Monthly Meteorological Report for Ferny Grove, Brisbane in December 2020 – warm nights and above average rainfall

In December at Ferny Grove overnight temperatures were over 1 ºC above average and the highest in 11 years. Daytime temperatures were close to average and the lowest in 5 years. In the Brisbane area the official sites observed above or well above average overnight temperatures and near average or above average daytime temperatures. There were many warm to hot days during the month. Rainfall at Ferny Grove was above average and was the highest in 10 years. Across the Brisbane area the official sites observed near average, above average and well above average rainfall totals. At Ferny Grove air pressure was below average, mean, mean minimum and mean maximum relative humidity was above average, mean minimum, mean maximum and mean dew point was above to average, wind speed was near average and there were 4 thunderstorms (3 thunder days).

 

Temperature – above average overnight and near average daytime temperatures

Monthly Mean Daily Minimum Temperature: 20.8 ºC, 1.6 ºC above average and 1.2 ºC higher than same month in 2019. This is the second highest on record for December and the second highest since the current record high of 21.1 ºC in 2009. All the official stations in the Brisbane area observed above or well above average mean maximum temperatures, with the highest anomalies observed by the inland sites. A number of sites observed temperatures that at least 2 ºC above average of 2.1 ºC above average at Archerfield with a mean minimum temperature of 21.2 ºC and Beaudesert (20.2 ºC) and Logan City Treatment Plant observed a mean minimum temperature of 2 ºC above average (21.3 ºC). The mean minimum temperature for Cape Moreton Lighthouse was closest to the long-term average at 1.2 ºC above average, with a mean minimum temperature 22.2 ºC. The lowest mean minimum temperature was 18.9 ºC at Canungra. The remaining sites were between 1.2 ºC and 1.8 ºC above average. The highest mean minimum temperature was 22.4 ºC at Redcliffe (1.4 ºC above average). Brisbane observed a mean minimum temperature of 22.2 ºC, 1.8 ºC above average. Amberley, Archerfield and Gatton observed the highest mean minimum temperature in 23 to 41 years and Logan City Treatment Plant, Brisbane Aero and Brisbane observed were the highest on record for December.

 

Monthly Mean Daily Maximum Temperature: 30.3 ºC, 0.3 ºC above average and 2.7 ºC lower than same month in 2019. This is the fourth lowest on record for December and the equal lowest since 30.3 ºC in 2015. Mean maximum temperatures were above average at many of the official sites in the Brisbane area. The inland sites observed mean maximum temperatures that were the highest above average of all the sites. Gatton observed the highest mean maximum temperature of 33.3 ºC, which was the highest above the long-term average at 1.9 ºC above average. Amberley and Archerfield were 0.9 ºC above average and was 31.8 ºC and 30.6 ºC respectively and Beerburrum was 0.6 ºC above average at 31.2 ºC. Cape Moreton Lighthouse was 1.7 ºC above average (27.9 ºC) in contrast to near average temperature at the coastal sites and observed the lowest mean maximum temperature. The sites measuring near average mean maximum temperatures were between 0.3 ºC above average at Logan City Treatment Plant (29.5 ºC) and Brisbane (29.9 ºC) and 0.5 ºC above average at Beaudesert (31.2 ºC).

 

Mean Monthly Temperature: 25.6 ºC, 1.0 ºC above average, 0.7 ºC lower than the same month in 2019. This is the fourth highest on record for December and the lowest since 24.9 ºC in 2018.

 

Lowest Temperature: 16.6 ºC on 27 December 2020 at 4:46 AM. Same month in 2019 was 14.4 ºC. This is the equal highest on record for December, equalling the current record high of 16.6 ºC in 2009 on 3 December, the equal twentieth lowest daily minimum temperature and the lowest since 15.1 ºC on 6 December 2019 at 4:52 AM. Official stations in the Brisbane area observed the lowest temperature of the month at most sites on the 12th and 27th and at some sites on the 9th, 13th and 26th. The lowest was 12.9 ºC at Canungra on the 9th and the highest was 24.4 ºC at Brisbane Aero on the 30th. In the Brisbane area overnight temperatures were above average during much of the month especially the first 8 days and on the 15th to 23rd. Brisbane observed its lowest temperature of 17.3 ºC on the 12th.

Highest Temperature: 35.9 ºC on 6 December 2020 at 11:38 AM. The same month in 2019 was 42.8 ºC. This is the fourth lowest monthly maximum temperature for December on record, the lowest since 35 ºC in 2015 on 11 December at 1:30 PM, the fourteenth highest daily maximum temperature and the highest since 42.8 ºC on 16 December 2019 at 1:00 PM. The official sites measured the highest temperature for the month at most sites on the 6th and 7th and at Point Lookout on the 10th. The lowest was 31.5 ºC at Point Lookout on the 10th and the highest was 43.5 ºC at Gatton on the 6th. The highest temperature observed at Brisbane was 33.9 ºC on the 7th. Most days in the first 8 days of month were above average before above average temperatures returned between the 15th and 23rd with low to severe-intensity heatwaves in the Brisbane area during this time. In the last week of the month, there were some warm days also. Gatton observed a run of three days that were above 40 ºC between the 4th and 6th, having only occurred two other times at Gatton. Gatton observed a new record for the highest December temperature of 43.5 ºC, exceeding the previous record high of 24.9 ºC on 18 December 2012.

 

Lowest Daily Maximum Temperature: 20.9 ºC on 12 December 2020 at 9:31 AM. This is the second lowest monthly and daily lowest daily maximum temperature for December on record and the lowest since the current record low of 18.9 ºC in 2011 on 7 December at 4:36 PM. Same month in 2019 was 26.6 ºC. The official sites measured the coolest day of the month on the 13th at most sites and at some sites on the 5th and 12th. These ranged between 22.7 ºC at Archerfield and Brisbane on the 13th and 24.3 ºC at Gatton on the 13th. In the middle of the month there were a few cool days before some days in the last week of the month were below average.

 

Highest Daily Minimum Temperature: 26.2 ºC on 7 December 2020 at 4:28 AM. This is the highest daily minimum temperature on record for December exceeding the previous record high of 24.5 ºC in 2012 on 18 December 2020 at 4:00 AM. Same month in 2019 was 26.2 ºC. In the Brisbane area the warmest nights occurred on the 7th at many sites and on the 2nd, 3rd, 19th and 30th at some sites. These ranged between 23.6 ºC at Beaudesert on the 7th and 25.8 ºC at Brisbane on the 7th. Many nights during the month were above average with warm nights between the 1st and 8th and between the 15th and 23rd and some nights at the end of the month. Archerfield observed the highest daily minimum temperature on record for December of 25.3 ºC on the 7th exceeding the previous record high of 24.9 ºC on 18 December 2012.

 

Monthly Mean Minimum Grass Temperature: 19.1 ºC (1.1 ºC higher than same month in 2019).

 

Lowest Daily Minimum Grass Temperature: 13.8 ºC on 27 December 2020 (1.8 ºC higher than same month in 2019). This coincided with the lowest minimum air temperature of 16.6 ºC for the month.

 

Highest Daily Minimum Daily Grass Temperature: 21.9 ºC on 7 December 2020 (1.1 ºC lower than same month in 2019). This coincided with the highest minimum air temperature of 26.2 ºC for the month.

 

Highest Minimum Grass Temperature Depression: 4.3 ºC on 7 December 2020 with a minimum grass temperature of 21.9 ºC and an air temperature of 26.2 ºC.

 

Lowest Minimum Grass Temperature Depression: -2.4 ºC on 13 December 2020 with a minimum grass temperature of 20.5 ºC and an air temperature of 18.1 ºC.

 

Minimum temperatures in December were predominately above average during the month and were near or below average in the middle of the month and at the end of the month. The first 8 days of the month were above average with the 1st at 4 ºC above average, 2 ºC above average on the 2nd, the 3rd was 3 ºC above average and the 4th was 3 ºC above average. On the 5th and 6th, it was 2 ºC above average before the warmest night at 7 ºC above average on the 7th easing to 2 ºC above average on the 8th. The 9th and 10th were close to average, warmed to 2 ºC above average on the 11th, cooled to 2 ºC below average on the 12th and was 1 ºC below average on the 13th and 14th. Another warm period followed between the 15th and 23rd starting with 2 ºC above average on the 15th and 16th, 3 ºC above average on the 17th and was 4 ºC above average on the 18th to 20th. The 21st was 3 ºC above average, 2 ºC above average on the 22nd and 4 ºC above average on the 23rd. The temperature eased to near average on the 24th, was 1 ºC above average on the 25th and was 1 ºC below average on the 26th. The 27th was 1 ºC below average and 1 ºC below average on the 28th. On the 29th it was near average, warming to 5 ºC above average on the 30th and eased to 1 ºC above average on the 31st.

 

Maximum temperatures in December saw two periods of warm days at the start of the month and between the 18th and 23rd, as well as near average or below average temperatures. The first 8 days of the month was warm with the 1st 4 ºC above average, 3 ºC above average on the 2nd, 2 ºC above average on the 3rd and 4 ºC above average on the 4th and 5th. The 6th was 6 ºC above average, 5 ºC above average on the 6th and 7th and 2 ºC above average on the 8th. The temperature eased to 2 ºC below average on the 9th and was near average on the 10th before several cool to cold days between the 11th and 14th. The 11th was 5 ºC below average, 9 ºC below average on the 12th and 13th and 4 ºC below average on the 14th. On the 15th and 16th, it was near average, 1 ºC below average on the 17th and 1 ºC above average on the 18th and 19th. A warm period followed of 3 ºC above average on the 20th, 2 ºC above average on the 21st, 4 ºC above average on the 22nd and 3 ºC above average on the 23rd. Cooler days followed at 3 ºC below average on the 24th and 1 ºC below average on the 25th to 27th. It was 1 ºC above average on the 28th, was near average on the 29th, 4 ºC below average on the 30th and near average on the 31st.

 

Heatwave Conditions (Maximum temperatures): 1st to 3rd: Low Intensity (33.8 ºC, 33.3 ºC, 31.7 ºC), 4th to 7th: Severe Intensity (34.2 ºC, 34.4 ºC, 35.9 ºC, 35.2 ºC)

 

MSL pressure – below average air pressure

Monthly Mean Daily Minimum MSL Pressure: 1010.2 hPa (0.3 hPa lower than same month in 2019). This is the equal fourth lowest on record for December and the equal lowest since 1010.3 hPa in 2017.

 

Monthly Mean Daily Maximum MSL Pressure: 1015 hPa (0.7 hPa lower than same month in 2019). This is the fifth lowest on record for December and the lowest since 1014.4 hPa in 2017.

 

Monthly Mean MSL Pressure: 1012.6 hPa (0.7 hPa below average, 0.5 hPa lower than same month in 2019). This is the fifth lowest on record for December and the lowest since 1012.3 hPa in 2017.

Lowest MSL Pressure: 1004.1 hPa on 6 December 2020 at 4:33 PM. The same month in 2019 saw 1006.5 hPa. This is the third highest monthly minimum air pressure for December, the highest since 1005.9 hPa in 2015 on 11 December at 4:40 PM, the twenty-first lowest daily minimum air pressure for December and lowest since 1003.9 hPa in 2019 on 16 December at 1:54 PM.

 

Highest MSL Pressure: 1020.9 hPa on 12 December 2020 at 10:26 AM. The same month in 2019 saw 1030 hPa. This is the fifth lowest December monthly maximum air pressure, the lowest since 1019.5 hPa in 2017 on 10 December at 8:42 PM, the equal sixteenth highest daily maximum air pressure for December and the highest since 1021.2 hPa in 2019 on 9 December at 8:07 AM.

Note: Air pressure measurements are being closely monitored to maintain its accuracy. Over the month of December, a difference of 0.12 hPa lower compared to the official BoM Brisbane site – No. 040913 was observed which is deemed as being optimum.

 

Relative Humidity – above average mean humidity, mean minimum humidity, and mean maximum humidity

Monthly Mean Daily Minimum Humidity: 54.4 % (11.1 % higher than same month in 2019 and 3.5 % above average). This is the fourth highest on record for December and the highest since 56.7 % in 2011.

 

Monthly Mean Daily Maximum Humidity: 92.5 % (6 % higher than same month in 2019 and 1.6 % above average). This is the equal fourth highest on record for December and the equal highest since 92.1% in 2017.

 

Monthly Mean Humidity: 73.4 % (8.5 % higher than same month in 2019 and 2.6 % above average). This is the third highest on record for December and the highest since 75.6 % in 2011.

 

Lowest Humidity: 19 % on 8 December 2020 at 3:49 PM (12 % higher than this month in 2019). This is the fourth lowest monthly minimum humidity for December on record, the highest since 26 % in 2017 on 7 December at 12:56 PM, the sixth lowest daily minimum humidity for December and the lowest since 9% on 16 December 2019 at 9:21 AM.

 

Highest Humidity: 99 % on 15 December 2020 at 5:28 AM (2 % higher than this month in 2019). This is the third highest and lowest monthly December maximum humidity on record and the equal lowest since 99% in 2017 since the current record low of 87% in 2016 on 20 December at 6:59 AM.

 

Dew point – above average mean, mean minimum and mean maximum dew point

Monthly mean daily minimum dew point: 17.8 ºC (1.3 ºC above average). This is the second highest monthly mean minimum dew point for December on record and the highest since the current record high of 19.1 ºC in 2010.

 

Monthly mean daily maximum dew point: 22.4 ºC (1.6 ºC above average). This is the highest mean maximum dew point for December on record exceeding the previous record high of 21.7 ºC in 2017.

Monthly mean dew point: 20.1 ºC (1.5 ºC above average). This is the second highest monthly mean dew point for December on record equalling 20.1 ºC in 2010.

 

Lowest dew point: 4.9 ºC on 8 December 2020 at 3:51 PM. This is the fourth lowest monthly minimum dew point for December on record, the highest since 10.9 ºC in 2017 on 6 December at 3:42 PM, the tenth lowest daily dew point for December and the lowest since 2.8 ºC on 16 December 2019 at 12:43 PM.

 

Highest dew point: 25.5 ºC on 17 December 2020 at 12:12 PM. This is the fourth highest daily and monthly maximum dew point on record for December and the highest since 25.7 C in 2016 on 31 December at 1:20 PM.

 

Wind Speed – near average wind speed

Maximum Wind Gust: 50 km/hr on 14 December 2020 at 5:16 AM. This is the fifth lowest monthly December maximum wind gust on record, the lowest since 48 km/hr in 2018 on 21 December at 5:45 PM, the twentieth highest daily wind gust for December and the highest since 54 km/hr on 11 December 2019 at 10:07 PM.

 

Maximum Wind Speed: 21 km/hr on 7 December 2020 at 2:27 PM (Moderate Force Wind). This is the lowest monthly maximum wind speed for December on record, exceeding the previous record low of 25 km/hr in 2018 on 21 December at 5:45 PM, the fifth-first highest daily wind speed for December and the equal highest since 21 km/hr in 2019 on 24 December at 3:48 PM.

 

Wind Run: 3720.2 km (743.2 km lower than same month in 2019), 418.1 km above average and 1.1 % above average. This is the third highest on record for December total wind run and the lowest since 1257.3 km in 2017.

 

Monthly Mean Wind Speed: 4.3 km/hr (1.7 km/hr lower than this month in 2019), 0.1 km/hr below the long term average). This is the third highest on record for December and the lowest since 1.7 km/hr in 2019.

 

Daily Mean Maximum Wind Gust: 28.1 km/hr (3.4 km/hr lower than this month in 2019), 0.9 km/hr above average and 3.9% above average. This is the fourth lowest daily mean maximum wind gust on record for December and the lowest since 26.3 km/hr in 2014.

 

Daily Mean Maximum Wind Speed: 14.9 km/hr, 1.7 km/hr lower than this month in 2019), 3.7 km/hr above average and 4.4 % above average. This is the second lowest on record for December and lowest since the current record low of 14.7 km/hr in 2018.

 

Dominant Direction: NE (E this month last year).

 

Rainfall – above average rainfall

Monthly Rainfall Total: 145.9 mm (16.7 mm above average) and 112.9% of the long-term average. This total is in decile 9/ 82nd percentile which ranks as high and 57.1 mm above the long-term median (161 % of long term median). This total is higher than this month in 2019 which was 56 mm, the seventh highest on record for December and the highest since the current record high of 450.1 mm in 2010.

 

Most long period rainfall totals continue to remain below or well below average, that improved for many of these periods. As compared to the previous month the 6 monthly rainfall improved a little to 18.3 mm below average (decile 3). 9 monthly rainfall deteriorated from 171.9 mm above average to 52.7 mm below average (decile 6 to decile 3), while 12 month rainfall improved by 91 mm to 94.2 mm above average (decile 6). 18 month rainfall was 38 mm below average (decile 3) and improved by 100mm compared to the previous month. 24 monthly and 36 monthly rainfall improved a little from the previous month while remaining below average and was 366.1 mm below average (decile 3) and 203 mm (decile 4) respectively. 48 monthly rainfall deteriorated a little and was 156.7 mm below average (decile 5). Compared with the same period in the previous year most of these periods have improved, though some of the longer periods have not improved as much. The anomaly from the long term average for the 12 monthly rainfall have improved by 564 mm which was largest improvement of these periods compared with the same period in the previous year.

 

The official sites in the Brisbane area observed near or above average rainfall totals at most sites. The lowest rainfall total observed by the main official sites was 47 mm at Gatton, which was 48 % of the long-term average and ranked as low. Many sites ranked as average with totals that were between 75 % at Cape Moreton (94 mm) and 100 % of the long-term average at Brisbane Aero (120.2 mm). Several sites ranked historically as high and these were 169 mm at Archerfield (136 % of the long-term average), 158 mm at Beaudesert (138 % of the long term average) and 150.4 mm at Redcliffe (130 % of the long term average). A total of 241 mm at Beerburrum ranked as very high and was 155 % of the long-term average. The highest total of the main official sites was 258 mm at Logan City Treatment Plant which was 206 % of the long-term average and was the highest on record for December. The previous record high was 252.6 mm in December 1995. The highest rainfall total of all the official sites was 445.8 mm at Mt Tamborine. Brisbane observed a total of 127.2 mm which was 99 % of the long-term average and ranked as average.

 

In the Brisbane area there were large cumulative rainfall totals between the 12th and 18th with periods of very heavy rainfall due to the presence of a coastal trough and surface low pressure system off the coastline as well as an upper-level trough. The 7 days between the 12th to 18th brought around 90% of the monthly rainfall total at Brisbane. There was flooding in south-east Queensland around the Logan River. The Brisbane Buoy measured a maximum wave height of 11 meters and there were 30 cm to 70 cm storm surges at south-east Queensland storm tide gauges during this time. There was coastal flooding in low-lying area south of Fraser Island from a storm surge of 50 cm that coincided with high tides. Since records began in 1980 Brisbane recorded at least its fourth-highest daily maximum sea level.

 

Number of Rain Days (0.1 mm or greater): 12 days, 5 greater than same month in 2019 and 1.9 days below average. This is equal tenth highest on record for December and is the highest since 13 days in 2018.

 

Highest Daily Total: 70.1 mm on 14 December 2020. This is the fifth highest on record for December on monthly and daily basis and the highest since 82 mm in 1999 on 28 December. The highest daily total in the Brisbane area of all official sites was 140 mm at Peachester on the 14th.

 

The year to date total is 1135.5 mm (53 mm above average and 23.3 % above average) and compared with previous annual totals is the highest since 1263.6 mm in 2015 and is the fourteenth highest on record.

 

Monthly Rainfall Total – (automatic gauge) 24 hours to 9am: 127.2 mm (7.6 mm less than the site official standard gauge and within 8.3 %). Highest daily total of automatic gauge, (24 hours to 9am): 57 mm on 14 December 2020, (24 hours from midnight): 41.4 mm on 14 December 2020.

 

Note: This automatic gauge for the month of December, reached the expected accuracy (of +/- 10% of the standard gauge) at -8.3%.

 

On the 7th was light rain in the early to mid-morning, then a mild thunderstorm that brought moderate falls, a light shower in the late afternoon before a mild decaying thunderstorm in the early evening. 9.3 mm was measured on the 8th. Some brief light showers in the late morning and early afternoon of the 11th, light showers in the mid-afternoon and again in the evening before tending to light rain periods later in the evening and in the early hours of the 12th. After very light rain in the morning, 14.9 mm was measured on the 12th. In the late afternoon were light showers and again in the evening with some brief moderate falls in the evening. In the early hours of the 13th were light and brief showers, increasing in frequency later in the early evening and continued less frequently until the mid-morning. 20.5 mm was measured on the 13th. Later in the morning was a light shower, then light rain or drizzle in the afternoon and evening before moderate falls later in the evening. Light to moderate rain from early in the day on the 14th, easing to light to moderate showers during the rest of the early hours until the mid-morning. 70.1 mm was measured on the 14th. In the middle of the day was light rain that cleared to light showers and drizzle in the afternoon that cleared in the late afternoon, with 12.3 mm observed on the 15th.

 

Later in the morning of the 15th were light to moderate showers and a brief light shower at 4am on the 16th that brought 3.6 mm on the 16th. In the late afternoon and in the evening were light showers, followed by some light showers early on the 17th. 3.4 mm was measured on the 17th. During the late morning were light to moderate showers, a light shower in the early afternoon before some light showers early on the 18th brining 6.2 mm on the 18th. At 4am on the 20th was a light shower with no measurable rain. In the evening were light falls from a mild thunderstorm passing to the south, with 1.6 mm on the 21st. In the mid to late afternoon of the 22nd and later in the evening were light showers. 1.9 mm was measured on the 23rd. A few drops of rain in the late evening on the 29th and on the 30th was some drizzle in the early morning and some very brief light showers and drizzle periods that brough 0.2 mm on the 30th. Some occasional light showers and drizzle in the afternoon and some light showers in the early hours and early morning of the 31st brought 1.9 mm on the 31st. In the early afternoon was a light shower and 1.3 mm was measured the next day.

 

There was 1 days with falls of at least 25 mm (1 greater than same month in 2019) with 1 days of less than 1 mm (equal to same month in 2019).

 

Highest rainfall rate was 56.2 mm/hr on the 1 December 2020 at 3:48 PM. This is the third lowest monthly rainfall rate for December on record, the lowest since 55.2 mm/hr in 2012 on 10 December at 12:45 PM, the thirteenth highest daily maximum rain rate for December and the highest since 188.8 mm/hr on 24 December 2019 at 7:51 PM.

 

The highest hourly rainfall total was 13.2 mm on the 14 December 2020 at 12:32 AM. This is the fourth lowest hourly rain for December on monthly basis, the lowest since 8.2 mm in 2018 on 16 December at 5:05 PM, the seventh highest daily hourly rainfall for December and the highest hourly total for December since 15.4 mm on 24 December 2019 at 8:45 PM.

 

Number of severe thunderstorms:0

 

Number of thunderstorms: 4 (Mild: 4, Moderate: 0)

 

Number of thunder days: 3 days

 

Number of nearby storms: 2

 

Severe thunderstorms of note in the Brisbane area: Nil

 

Remarks for month

• Smoke haze on the 1st to 4th.
• Warm in the early hours and in the late evening on the 1st.
• Cloudy in the afternoon of the 2nd and warm or very warm early in the day, in the morning and in the afternoon.
• Very warm early in the day eased during the morning on the 3rd.
• On the 4th it was mostly sunny with the temperature warm early in the day as the temperature rose slowly. Warm in the morning and evening. Variable temperature from the mid-morning to the mid-afternoon.
• Sunny on the 5th and was warm until the early afternoon. Warm in the evening.
• Smoke haze on the 6th and 7th.
• Warm early on the 6th and became hot in the morning before the maximum temperature was reached in the late morning. Hot in the evening with the temperature falling slowly.
• Cloudy on the 7th with some rainfall. Very hot in the early hours with the temperature not falling much, was warm in the morning before becoming cool in the afternoon after dropping 9 C in just over an hour. Low relative humidity in the early hours and early morning after briefly falling quickly early in the day and rose very slowly during the rest of the early hours.
• The 8th was mostly cloudy in the morning and was warm early in the day. Variable temperature from the mid-morning to the mid-afternoon. Low dew point in the afternoon after falling from the mid-morning before easing after the dew point rose sharply in the afternoon by 9 C in 10 minutes. Relative humidity became low in the afternoon to 21% before rising later in the afternoon of 33% in 20 minutes. An SSE to ESE wind change in the late afternoon.
• Smoke haze on the 9th, with quite variable temperature from the mid-morning to mid-afternoon and was cool. Low relative humidity in the early hours and in the morning.
• The temperature rose slowly in early hours after the minimum temperature was reached at the start of the 10th. Variable temperature from the mid-morning to the mid-afternoon.
• Cloudy in the afternoon of the 11th and was cool to cold in the afternoon after the maximum temperature was reached in the late morning accompanied with rainfall. High relative humidity from the mid-afternoon and in the evening.
• The 12th was cloudy with rainfall and was cool to cold from the mid-morning to the late afternoon. Very high relative humidity in the morning and eased in the afternoon.
• Cloudy with showers on the 13th and was cool to cold from the mid-morning after the maximum temperature was reached in the mid-morning and remained below this temperature over the entire day.
• Cloudy on the 14th with rainfall. The temperature rose or was stable in the early hours after the minimum temperature was reached in the previous evening. The maximum temperature of the previous day occurred in the mid-morning. Cool to cold in the late morning and in the afternoon. High relative humidity later in the morning and in the afternoon. Light and gusty SSW to SW tending S to SE in the morning before the wind died down after midday.
• Early fog on the 15th and was cloudy in the mid to late morning. Cool later in the morning with some showers. Near saturation early in the day and was high later in the morning before easing in the afternoon.
• On the 16th it was cloudy at times and after the minimum temperature was reached at 2am the temperature became warm later in the early hours. The temperature was variable from the mid-morning to the mid-afternoon and was warm later in the evening.
• A warm start to the 17th, was a cloudy day and became cool from the late morning to the late afternoon after the maximum temperature was reached in the middle of the day. High relative humidity later in the morning and in the afternoon.
• Warm early in the day and in the evening on the 18th, with variable temperature from the mid-morning to the mid-afternoon.
• Cloudy in the morning of the 19th, was warm early in the day and the temperature was variable from the mid-morning to the mid-afternoon.
• On the 20th it was cloudy in the afternoon. It was warm until the morning before the maximum temperature was reached in the middle of the day and was warm later in the evening.
• Warm until the mid-morning and in the evening and was cloudy in the afternoon on the 21st and 22nd. The temperature was variable from the mid-morning to the mid-afternoon on the 22nd.
• An ESE to ENE wind change in the early afternoon of the 23rd and was warm early in the day.
• On the 24th it became cloudy and became cool from the late morning to the late afternoon after the temperature rose more slowly later in the morning.
• Cloudy at times on the 25th.
• Variable temperature from the mid-morning to the mid-afternoon on the 25th and 26th
• Mostly sunny on the 27th and 28th
• On the 29th it became cloudy and became warm in the evening.
• Cloudy on the 30th, was warm early in the day with the temperature stable or fell slowly and eased in the morning. It became cool in the morning and afternoon while the temperature generally fell.
• Quite variable temperature from the mid-morning to the mid-afternoon of the 31st.
• 0 days of dew.

 

Weather influences

• On the 1st a high pressure system in the Tasman Sea extended a ridge along the east Queensland coast. A surface trough shifted eastwards over western Queensland and brought warm northerly flow.
• A decaying ridge extended along the east Queensland coast on the 2nd, while a trough became slow moving over the interior of the state and continued to extend warm northerly flow across to its east.
• On the 3rd a weakening ridge continued to extend along the east Queensland coast, while a surface trough remained over the inland and extended a warm and stagnant air mass over much of the state that continued to extend over eastern Queensland.
• The inland trough weakened over the inland of the state on the 4th that extended some instability in the south-east of the state and maintained a warm air mass. A weak ridge remained along the east Queensland coast from a weak high pressure system near New Zealand
• On the 5th the inland surface trough decayed while another trough shifted into western Queensland that shifted eastwards over the interior of the state on the 6th maintaining warm northerly flow over most of the state and over the south-east.
• On the 7th the trough shifted eastwards into central and south-eastern parts of the state and brought warm conditions to its east and instability in the region.
• On the 8th a surface trough and cold front shifted northwards through south-east Queensland reaching northern parts of the region in the evening and extended a south-easterly wind change with its passage. This brought instability with some showers and thunderstorms.
• A high pressure system over eastern New South Wales on the 9th moved into the Tasman Sea and extended a ridge along the southern Queensland coast.
• A weak high pressure system moved into the Tasman Sea and extended a ridge of high pressure of the east Queensland coast on the 10th
• On the 11th an upper low pressure system was located over northern New South Wales. A surface trough developed in the Coral Sea and brought unstable conditions especially on the southern Queensland coast. A high pressure system extended a ridge along the east Queensland coast.
• An upper low pressure system shifted northwards into south-east Queensland on the 12th as a coastal trough developed off the southern Queensland coast that brought instability. A high pressure system moving east into the Tasman Sea extended a ridge and onshore flow along the east Queensland coast.
• On the 13th an upper low pressure system moved northwards through south-east Queensland and shifted off the Rockhampton coast. This induced the surface trough off the southern and Fraser Coasts to deepen further and a low pressure system to develop off the Fraser coast while drifting towards the southern Queensland coast. A high pressure system in the Tasman Sea extended onshore wind flow along the east Queensland coast and this developed a convergent wind flow along the southern Queensland coast. This brought strong to gale force winds along the southern Queensland coast and resulted in dangerous surf conditions with coastal erosion and abnormally high tides as well as unstable conditions with rain and showers.
• On the 14th a high pressure system in the Tasman Sea extended a ridge along the east Queensland coast. An upper level low off the Capricornia coast shifted southwards into the south-east of the state while a coastal trough with multiple circulations on the trough shifted southwards towards the southern Queensland coast before moving onshore later in the afternoon while weakening. This produced severe weather with hazardous surf, abnormally high tides along the southern Queensland coast, heavy to intense rain and dangerous winds that eased during the day especially closer to the coastline.
• A weakening trough moved westwards over the south-east of the state, on the 15th while the upper low pressure system drifted southwards over the south-east. This brought further rainfall that eased early in the day as well as the high seas and abnormally high tides that also eased.
• On the 16th a weak trough over the south-east of the state in combination with a high pressure system in the Tasman Sea that extended a ridge along the east Queensland coast brought showers and thunderstorm over the south—east.
• An upper level trough on the 17th enhanced unstable conditions over the south-east of the state before shifting offshore later in the day. However unstable conditions persisted over most of the state, including the south-east as a trough in the previous few days remained over western parts of the state.
• On the 18th and 19th a trough remained over western Queensland while shifting slightly further eastwards. A high pressure system in the Tasman Sea extended a weak ridge along the east Queensland coast. Unstable conditions persisted in the region but was mostly over inland parts of the south-east.
• A trough over the west of the state shifted eastwards over the state and brought instability on the 20th and 21st, mostly away from the east Queensland coast. A new high pressure system moved eastwards into the Tasman Sea maintaining a weak ridge along the east Queensland coast.
• Warm ahead of a surface trough that shifted eastwards into the south-east of the state on the 22nd. This brought unstable conditions in the region.
• The trough cleared through the south-east of the state on the 23rd allowing a high pressure system developing in the Great Australian Bight to extend a south-easterly wind change over the south-east with settled conditions
• A ridge extended along the east Queensland coast on the 24th and 25th as a high pressure system remained over the Great Australian Bight moved into south-eastern Australia on the 25th. Cloud over the region as a trough extends over northern and central parts of the state.
• The high pressure system moved into the Tasman Sea on the 26th and extended a weakening ridge along the east Queensland coast on the 26th and 27th.
• On the 28th a weak ridge persisted along the east Queensland coast, contracting to the southern Queensland coast on the 29th as the high pressure system moved further east over the Tasman Sea and to near New Zealand on the 29th.
• A high pressure system moved into the Tasman Sea on the 30th and extended a ridge of high pressure along the east Queensland coast on the 30th and 31st.

Daily weather notes

• 1/12/20: Partly cloudy with Cu and Sc clouds. Smoke haze. The temperature fell slowly in the early hours and was warm, easing to slightly above average during the day, with the temperature a little variable from the mid-morning to the mid-afternoon. In the mid-afternoon the temperature temporarily eased to near average before slightly warm temperature became warm later in the evening. Stable and close to average or slightly above average dew point early in the day, fell slowly in the morning and in the afternoon and was near average that became slightly above average from the mid-morning before generally stable dew point in the evening. Slightly below average relative humidity early in the day, fell in the morning and became moderately low and then became near average during the day and in the evening. Light S to SE winds in the early hours, tended to S to SW later in the early hours with calm winds at times before S to ESE winds in the morning. This was followed by light and variable winds before NNE to ENE winds from the late morning, ESE to ENE winds in the mid-afternoon and ENE to NE during the rest of the afternoon and early in the evening. Light N to NNE winds during the rest of the evening.
• 2/12/20: Partly cloudy becoming cloudy in the afternoon with Cu and Ci clouds. Smoke haze. Warm from early in the day and warm during the morning. The temperature was slightly warm in the afternoon that fell a little slowly in the afternoon after the maximum temperature was reached in the middle of the day. In the evening, the warmth increased and became very warm in the late evening. Slightly above average dew point from early in the day that fell in the early hours, rose during the morning, became moderately high in the middle of the day before falling slowly in the afternoon, slightly above average. In the evening, the dew point was stable and slightly above average that became moderately high in the late evening. Near average relative humidity early in the day eased in the morning to slightly below average and back to near average from the late morning as the relative humidity fell more slowly. In the afternoon, the relative humidity was generally stable close to average or slightly above average before close to average relative humidity in the evening. Light N to NE winds at the start of the day became calm during the rest of the early hours before S to SW winds became E to SSE in the morning, became SE to NE from the mid-morning, E to NE in the afternoon and during the evening before E to SE winds later tonight.
• 3/12/20: Partly cloudy with Cu and Ci clouds. Smoke haze. Very warm start to the day as the temperature fell slowly, easing during the morning and became near average from the late morning. In the evening, the temperature became slightly warm. Stable dew point in the early hours and was moderately high before easing back to slightly above average in the morning as the dew point fell slowly. From the late morning the dew point returned to near average from the late morning, fell slowly in the afternoon before rising a little early in the evening before falling slowly later in the evening while remaining close to average. Relative humidity rose slowly in the early hours, slightly above average becoming near average from the mid-morning after the relative humidity that fell quickly in the morning fell more slowly. The relative humidity in the early evening was slightly below average and near average during the rest of the evening. Light ENE to SE winds early, N to ENE winds later in the early hours with some calm winds, NE to ESE in the morning, SE to NE in the afternoon before E to SE winds from the late afternoon. Winds tended ENE to NNE in the evening before calm winds later in the evening.
• 4/12/20: Mostly sunny with Ci clouds and some Cu clouds and Ac clouds in the morning. Smoke haze. During most of the early hours the temperature rose very slowly and was warm. After easing to slightly warm the temperature returned to warm during the morning as the temperature rose, then eased to slightly warm in the afternoon after the maximum temperature was reached in the middle of the day and was warm in the evening. Variable temperature from the mid-morning to the mid-afternoon. In the early hours, the dew point rose and during the morning and was slightly above average after the dew point was near average at the start of the day. In the morning, the dew point became stable and returned to near average, rose for a brief moment in the early afternoon and became slightly above average, was stable during the rest of the afternoon before falling slowly in the late afternoon and early in the evening. The dew point was stable during the rest of the evening and remained slightly above average. Relative humidity was slightly below average from early in the day that fell quickly in the morning and returned to near average from the afternoon. Calm winds early before light NNW to NE winds in the morning, shifting to ESE to ENE in the early afternoon, ESE to SE in the mid-afternoon before backing to ENE to NE in the late afternoon and early evening. Winds then became SSE to ESE before NNW to NE later in the evening that were followed by E to ENE winds.
• 5/12/20: Sunny with Ci clouds in the morning clearing in the afternoon. Warm from early in the day to the early afternoon before returning to near average in the mid to late afternoon as the temperature rose more slowly from the late morning and then fell from the mid-afternoon. Warm in the evening as the temperature fell slowly. In the early hours, the dew point fell slowly before rising in the morning, became stable from the mid-morning before falling slowly in the late evening while remaining slightly above average over the entire day. Near average or slightly below average relative humidity in the early hours while rising slowly, then became slightly below average in the morning as the relative humidity fell quite quickly in the morning before falling more slowly. From the mid-morning the relative humidity was near average. Light E to NE winds at the start of the day, tending N to NE before calm winds during the rest of the early hours, before NNW to WNW winds in the early morning became mostly S to ESE and then E to SSE from the mid-morning. Winds backed during the rest of the morning to E to NE from the late morning and until early evening. Light N to NE winds later in the evening with some N to NW winds.
• 6/12/20: Partly cloudy with Ci and Cs clouds. Smoke haze. Warm from early, became hot in the morning with the temperature rising quite quickly during the morning. After the maximum temperature was reached in the late morning, the temperature generally fell in the afternoon while easing to slightly warm. In the evening, the temperature became hot as the temperature fell slowly. In the early hours, the dew point fell slowly, rose a little in the early morning before falling very slowly afterwards slightly above average from early and near average in the morning. The dew point became stable during the morning, rose in the late morning, and became slightly above average, rose slowly in the afternoon, and became moderately high before becoming stable from the late morning. The relative humidity rose a little slowly in the early hours becoming slightly below average before moderately low relative humidity during the morning as the relative humidity fell quickly during the morning before easing to slightly to below average later in the morning as the relative humidity fell more slowly. From the late morning the relative humidity rose, quickly at first and quite steadily but more slowly afterwards with the relative humidity returning to near average. The relative humidity rose a little slowly in the evening slightly below average. Light N to NE winds in the early hours became calm later in the early morning before N to NE winds in the morning with some E to NE winds from the mid-morning. SE to NE later in the morning, ESE to SE in the early afternoon that became E to NE through to early evening. With some calm winds at times winds continued to E to NE before NW to NE winds later in the evening before calm winds at the end of the day.
• 7/12/20: Cloudy periods of Cu, Ac and As clouds becoming cloudy with Cu and Cb clouds in the afternoon Smoke haze. Light rain in the early to mid-morning. The edge of a mild thunderstorm at 2pm, followed by a mild thunderstorm with moderate falls and a light shower in the late afternoon. A mild decaying thunderstorm in the early evening. Very hot in the early hours, with the temperature rising and falling several times while generally not falling much. In the morning, the temperature eased to slightly warm, then after briefly rising sharply in the late morning and became warm the temperature stabilised in the middle of the day while remaining warm. Following this with the thunderstorms the temperature fell 9 C in just over an hour and became cool in the mid-afternoon before generally continuing to fall slowly during the rest of the afternoon and evening. During the evening, the temperature eased to near average and to slightly warm in the late evening. Dew point was stable at the start of the day, moderately high before sharply falling for a brief period and then became stable during the rest of the early hours slightly above average and early in the morning close to average. The dew point rose slowly in the morning and was close to average, then fell slightly in the middle of the day before rising in the early to mid-afternoon and became moderately high, reaching 24 C. During the rest of the afternoon the dew point was stable before falling a little and eased to slightly above average. In the evening, the dew point was slightly above average and stable. Relative humidity fell sharply for a brief period at the start of the day and became low and remained low during the rest of the early hours and during the early morning that only rose slowly before remaining stable but eased to slightly below average. During the morning, the relative humidity returned to near average, then rose in the afternoon and became very high from the mid-afternoon after rising 48% in 2 hours. As the relative humidity rose slowly or was stable the relative humidity eased during the evening to slightly above average later in the evening. Light WSW to WNW winds early in the day, backed during the rest of the early hours to NNE to NNW later in the early hours with some calm winds before N to NNE winds in the morning that were followed by calm winds before N to NE winds N from the mid-morning, then variable winds later in the morning and in the early afternoon that were followed by E to SE winds in the early afternoon. During the rest of the afternoon were N to NE winds with some E to NE winds of light strength and briefly moderate with the first thunderstorm. Light N to NNE winds in the evening with N to NW winds with the evening thunderstorm.
• 8/12/20: Mostly cloudy with Ac and As clouds, easing to partly cloudy in the afternoon with Cu and Sc clouds. Warm early in the day, easing to slightly warm in the morning. Variable temperature from the mid-morning to the mid-afternoon. In the afternoon, the temperature fell slowly and more quickly later in the afternoon before becoming slightly warm from the late afternoon as the temperature fell slowly. In the early hours, the dew point was stable, rose in the morning and was slightly above average, then fell from the mid-morning until the mid-afternoon from near average in the morning to low in the mid-afternoon. Later in the afternoon the dew point rose before rising sharply and returned to near average after rising 9 C in 10 minutes. In the evening, the dew point fell slowly close to average. Near average relative humidity was near average that rose slowly in the early hours, fell quickly during the morning reaching slightly below average in the late morning and to low in the afternoon as the relative humidity continued to fall but more slowly. After falling to a low of 21% the relative humidity rose later in the afternoon before rising sharply of 33% in 20 minutes easing to slightly below average. In the evening, the relative humidity rose slowly while remaining slightly below average. Light N to NNE winds at the start of the day, was followed by variable winds that became calm during the rest of the early hours before light WNW to NNW winds became N to NNW that tended WSW to NW during the rest of the morning and in the afternoon. An SSE to ESE wind change in the late afternoon with winds becoming S to SE in the evening with some calm winds early in the evening.
• 9/12/20: Partly cloudy with Cu and Sc clouds. Smoke haze. From early the temperature was near average or slightly warm and was quite variable from the mid-morning to the mid-afternoon. From the late morning to the mid-afternoon the temperature cooled from near average to slightly cool or cool. From the late afternoon the temperature returned to near average. For one hour the temperature rose instead of falling. Early in the day the dew point fell slowly, rose in the morning close to average before becoming stable from the mid-morning but was a little variable slightly below average. Slightly below average relative humidity at the start of the day, reduced to low later in the early hours and to low in the morning as the relative humidity rose slowly in the early hours and fell quickly in the morning. From the mid-morning the relative humidity fell more slowly and eased to near average from the late morning. In the evening, the relative humidity was slightly below average as the relative humidity rose a little slowly in the and fell for 1 hour during the evening. Light S to SE winds at the start of the day tended S to SSW winds with calm winds at times before SW winds in the early morning and then E to SE winds, E to NE in the late morning, E to SE in the early afternoon and was followed by E to NE winds with some E to SE winds before becoming calm late in the evening.
• 10/12/20: Partly cloudy with Cu and Sc clouds. The temperature rose slowly in the early hours after the minimum temperature was reached at the start of the day. Variable temperature from the mid-morning to the mid-afternoon. Later in the evening the temperature fell slowly before stabilising in the late evening and became slightly warm. Close to average dew point over the entire day that steadily rose in the early hours, became generally stable from the morning and a little variable. Relative humidity was stable and slightly below average early in the day, fell during the morning and became moderately low before returning to near average from the mid-morning to the late afternoon and then became slightly below average in the evening as the relative humidity rose a little slowly. Calm winds early, light N to ENE winds in the morning, E to NE from later in the morning, ENE to NE from the late afternoon before N to NE winds later in the evening and was followed by calm winds at the end of the day.
• 11/12/20: Partly cloudy with Cu and Sc clouds becoming cloudy in the afternoon. Some brief light showers in the late morning and early afternoon, light showers in the mid-afternoon before returning in the evening and tended to light rain periods later in the evening. Slightly warm in the early hours and in the morning as the temperature fell slowly or was stable in the early hours. In the morning and the first half of the afternoon the temperature was variable, with the maximum temperature reached in the late morning and was cool in the afternoon. The temperature reduced from near average in the morning to cold in the mid-afternoon as the temperature fell quickly in the mid-afternoon with the rainfall becoming stable or fell slowly during the rest of the afternoon and during the evening while remaining slightly cool. Stable dew point in the early hours, then rose a little in the early morning before falling in the morning close to average. From the mid-morning the dew point was generally stable but was a little variable and near or slightly below average and was slightly below average in the afternoon. In the evening, the dew point was stable and returned to near average later in the evening. Slightly below average relative humidity in the early hours as the relative humidity rose slowly before falling a little later in the early hours. As the relative humidity fell quickly in the morning this became moderately low. From the mid-morning the relative humidity stopped falling, was a little variable during the day while becoming moderately high in the afternoon and then rose in the mid-afternoon and became very high. As the relative humidity stabilised or rose slowly it returned to near average later in the evening. Mostly calm winds early before SSE to ESE winds with some S winds in the morning, tending SSW to SE from the mid-morning, then calm winds later in the evening, that were followed by SSW to SW winds in the evening.
• 12/12/20: Cloudy with As, Cu and Ns clouds and partly cloudy from the early to mid-afternoon. Light rain periods in the early hours, easing to very light rain in the morning until the mid-morning. Light showers in the late afternoon and evening with some brief moderate falls in the evening. Slightly cool in the early hours and initially fell before falling very slowly or was stable. In the morning, the temperature rose slowly and was cold to very cold from the mid-morning. The temperature rose more quickly in the afternoon, then soon stabilised soon afterwards and was quite variable and eased a little to cold. While remaining cold the temperature fell or was stable during the rest of the afternoon, then was cool that was generally stable before falling quickly for a brief period before becoming stable. Later in the evening the temperature eased to slightly cool. In the early hours, the dew point fell slowly close to average, rose slowly in the morning slightly below average before easing to near average in the early morning. During the morning, the dew point rose, stabilised later in the morning and was slightly below average or near average. In the early afternoon, the dew point rose, then fell from 2pm before slowly rising and was near average during the rest of the day. Slowly rising relative humidity in the early hours was close to average, then fell very slowly in the morning and became very high quite quickly before easing to slightly above average in the afternoon as the relative humidity fell during the day. In the evening, the relative humidity became moderately high after rising for a brief period before falling slightly while easing to slightly above average. During the rest of the evening the relative humidity rose slowly slightly above average. Light SSW to SW winds early, light S to SW winds in the morning and afternoon, S to SE in the early evening and after a brief period of calm winds there were S to SW winds before WSW to SSW winds with some variable winds at 10pm.
• 13/12/20: Cloudy with Cu and Ns clouds. Light and brief showers in the early hours, increasing in frequency later in the early hours and in the early morning and continued less frequently until the mid-morning. Light showers later in the morning, then light rain or drizzle during the afternoon, increasing a little in intensity in the evening before moderate falls in the later evening. In the early hours, the temperature rose slowly in the early hours, rose quite slowly in the morning, stopped rising from the mid-morning while rising that became cold in the mid-morning to very cold from the late morning. In the afternoon, the temperature rose slowly, while remaining below the earlier maximum temperature, then fell slowly later in the afternoon and early in the evening remaining very cold that eased to cold in the evening. The temperature rose slowly during the rest of the evening that eased to slightly cool later in the evening.
• 14/12/30: Cloudy with Cu and Ns clouds. Light to moderate rain at the start of the day, eased to light to moderate showers during the rest of the early hours and ceasing in the mid-morning. Light rain in the middle of the day cleared to light showers and drizzle during the afternoon that cleared in the late afternoon. The remnants of a thunderstorm passed through in the evening. Pressure reached a high of 1009.4 hPa at 8:26am that fell to a low of 1005.3 hPa at 11:23am that coincided with rain starting later in the morning then rose quickly from 11:50 am to 1007.3 hPa at 12:02pm. Following this the pressure fell slowly. The wind started to increase just before 10 am after the pressure had started to drop before easing as the pressure rose. The temperature was close to average early in the day, then became slightly warm as the temperature rose at the start of the day and was stable or rose slowly during the rest of the early hours. The minimum temperature occurred at 8pm in the previous day, whilst the previous day maximum temperature occurred in the mid-morning. In the morning, the temperature rose slowly and was slightly cool before becoming cold later in the morning. At 11am the temperature stopped rising, fell and became very cold and stabilised in the middle of the day. In the afternoon, the temperature rose slowly to the maximum temperature in the late afternoon but was a little variable and was cool. In the evening, the temperature eased to near average while falling slowly before stabilising later in the evening. At the start of the day the dew point rose at the start of the day and became slightly above average, then was stable during the rest of the early hours, rose slowly during the morning, slowly fell from the mid-morning, and returned to near average. In the middle of the day the dew point stabilised, then slowly rose that returned to slightly above average in the afternoon, fell slowly from the late afternoon before stabilising later in the evening while remaining slightly above average. Near saturation in the early hours and was stable, that became moderately high in the morning as the relative humidity remained stable. Later in the morning the relative humidity fell slowly and became very high, then rose in the late morning, stabilised in the afternoon, and fell slowly later in the afternoon while remaining very high. As the relative humidity rose a little from the late afternoon the relative humidity eased to moderately high before stabilising later in the evening. Light but gusty winds at times of SSW to SW early in the day that shifted to S to SE and then S to SSE in the morning. Increasing gusty winds at times light to briefly moderate S to SSE winds which was accompanied by the rainfall in the middle of the day before the wind died down just after midday. Light SSE to NE winds followed midday, tending S to SE of decreasing wind speed during the rest of the afternoon, with some calm winds late in the afternoon. Light S to SW winds in the evening with periods of calm before calm winds later in the evening.
• 15/12/20: Partly cloudy with Cu and Sc clouds and cloudy in the mid to late morning. Light to moderate showers later in the morning. Early fog lifted in the early morning before clearing. Early in the day the temperature fell slowly and was slightly warm before returning to near average in the morning. The temperature fell temporarily with the rainfall and became cool before easing back to near average by the early afternoon as the temperature rose but was a little variable. From the mid-afternoon the temperature generally fell close to average before falling more steadily from the late afternoon and became slightly warm in the evening. Dew point fell very slowly early, then rose in the morning slightly above average, generally fell in the afternoon while easing to slightly above average, stabilised in the late afternoon, rose a little early in the evening before stabilising during the rest of the evening, while remaining slightly above average. Close to average relative humidity and was stable and near saturation in the early hours and early morning at 99% for nearly 2 hours. Relative humidity was slightly above average in the morning, that became very high later in the morning as the relative humidity rose quickly to a high of 95% before generally falling through to the mid-afternoon and then was slightly above average from the mid-afternoon. Calm winds from early, then light and variable in the mid-morning, N to NNE winds in the late morning before NNE to ENE winds in the early afternoon. During the rest of the afternoon and early evening were E to NE winds before calm winds later in the evening.
• 16/12/20: Cloudy at times with Cu, Sc and Ac clouds. A brief light shower at 4am. Light showers in the late afternoon and in the evening. Slightly warm that became warm during the early hours and in the early morning after the minimum temperature was reached at 2am and then rose during the rest of the early hours. Near average temperature in the morning and afternoon and was variable while rising and falling many times from the mid-morning to the mid-afternoon. In the evening, the temperature became slightly warm and warm later in the evening while the temperature fell slowly. Dew point fell a little in the first 2 hours of the day before rising afterwards and was slightly above average before becoming moderately high from later in the early hours. In the morning and afternoon, the dew point was stable and moderately high, fell a little later in the afternoon before becoming stable in the evening while being slightly above average or moderately high. Relative humidity was near average that rose slowly in the early hours, fell rather slowly during the day and was a little variable and was moderately high in the morning and afternoon and became high later in the afternoon. In the evening, the relative humidity stabilised while easing to slightly above average later in the evening. Calm winds early before light WNW to SSW winds in the morning became ESE to SE from the late morning, became E to SE in the afternoon before ESE to ENE winds later in the afternoon. Light E to NE winds in the evening while gradually backing to N to NE later in the evening.
• 17/12/20: Cloudy periods with Cu, Sc and Ac clouds. Some light showers in the early hours. A light to moderate shower in the late morning and another light shower in the early afternoon. Stable or falling slowly temperature in the early hours with a warm night. The temperature returned to near average in the morning and was a little variable, then fell later in the morning with the shower and became cool before rising in the middle of the day. The temperature fell again in the early afternoon with the shower before rising afterwards but did not rise much higher than the maximum temperature that was reached in the middle of the day. The temperature returned to near average from the late afternoon before becoming slightly warm later in the evening as the temperature fell slowly in the evening. The dew point fell slightly in the early hours, then rose from the early morning moderately high but was quite variable before falling in the afternoon and eased to slightly above average from the late afternoon. In the evening, the dew point was stable and returned to moderately high late in the evening. Near average relative humidity from early, fell rather slowly in the morning before rising later in the morning and became very high. In the afternoon, the relative humidity fell slowly but rose and fell a few times while remaining very high. In the late afternoon, the relative humidity eased to moderately high and to slightly above average in the late evening as the relative humidity rose quite slowly from the late afternoon. Light N to NNE with some NE winds and was calm at times in the early hours and in the morning, light E to NE from the mid-morning, ENE to NE from the early afternoon before becoming NNE to NE in the evening and N to ENE later in the evening.
• 18/12/20: Partly cloudy with Cu and Sc clouds. Some light showers in the early hours. Warm in the early hours as the temperature was stable or fell slowly, then eased during the morning to near average from the late morning as the temperature rose more slowly later in the morning. The temperature was variable from the mid-morning to the mid-afternoon. Slightly warm early in the evening and became warm as the temperature fell more slowly before stabilising later in the evening. Dew point was stable in the early hours and rose a little in the morning, then after briefly falling the dew point rose during the morning while remaining moderately high before falling in the afternoon slowly that became slightly above average in the late afternoon. In the evening, the dew point rose slowly moderately high. Relative humidity was near average from early in the day, fell quickly in the early morning to mid-morning that became generally stable from the mid-morning. Near average relative humidity became moderately high from the middle of the day, eased to slightly above average later in the afternoon and was near average in the evening. Light N winds early in the day became NNE to ENE before calm winds from later in the early hours, and then N to NNE winds in the morning. From the late morning were E to NE winds, ENE to NE from the late afternoon, then N to NE in the early evening before N to NNW winds in the late evening.
• 19/12/20: Cloudy in the morning and partly cloudy in the afternoon with Cu and Sc clouds. Warm early in the day while the temperature fell slowly, eased to slightly warm in the morning and to near average later in the morning. Variable temperature from the mid-morning to the mid-afternoon. In the evening, the temperature fell slowly and was slightly warm. Dew point fell very slowly early in the day, rose a little in the morning moderately high, returned to moderately high from the morning as the dew point rose during the morning and afternoon. From later in the afternoon the dew point fell and more slowly in the evening while returning to slightly above average. Relative humidity was near average or slightly above average in the early hours, fell in the morning slightly below average, became generally stable from the mid-morning to the mid-afternoon becoming moderately high in the middle of the day and eased to slightly above average later in the afternoon. In the evening, the relative humidity was close to average. Light N to NE winds became NNE to E in the early hours with some variable winds that became calm later in the early hours and during the early morning. Light N to NE in the morning became E to NNE later in the morning, E to ESE in the afternoon with some ENE winds and then E to NE later in the afternoon. Early in the evening were ENE to NE winds before N to NW winds later in the evening.
• 20/12/20: Partly cloudy with Cu and Sc clouds in the morning and became cloudy in the afternoon with Cu and Sc clouds. A light shower at 4am. Distant thunder in the evening and a mild thunderstorm with light falls as a thunderstorm passes to the south. Some very brief light showers followed the thunderstorm. Warm early in the day as the temperature fell slowly or was stable. Warm in the morning and after the maximum temperature was reached in the middle of the day the temperature returned to near average in the afternoon. In the evening, the temperature fell slowly and became slightly warm in the early evening and warm later in the evening. Dew point was stable in the early hours moderately high, rose a little in the early morning generally stable during the rest of the morning while rising to slightly above average. In the afternoon, the dew point briefly rose in the early afternoon and became moderately high before falling during the rest of the afternoon and returned to slightly above average from the mid-afternoon. In the evening the dew point rose before stabilising later in the evening and became moderately high. Relative humidity was near average from early, slightly above average in the afternoon, near average in the early evening and slightly above average late in the evening. Light NNW to NE winds with some NW winds in the first 4 hours of the day, then calm before NNW to NE winds in the morning with some E to NE winds later in the morning became E to NE in the afternoon and early evening, then NNE to ENE, followed by variable winds that became calm before N to NE at the end of the day.
• 21/12/20: Partly cloudy with Cu and Sc clouds and cloudy with some Ci/ Cs clouds in the afternoon. Warm from early in the day to the mid-morning as the temperature fell quite slowly in the early hours and rose quite quickly in the morning. The temperature returned to near average from the mid-morning that rose more slowly from the late morning to the maximum temperature in the mid-afternoon. Slightly warm to warm in the evening as the temperature fell a little slowly. Dew point fell slowly in the early hours, rose slowly in the morning before stabilising from the mid-morning moderately high, rose a little later in the morning and then fell in the afternoon before becoming slightly above average later in the afternoon and after falling slightly in the early evening the dew point rose slowly before falling in the late evening remaining slightly above average. Near average relative humidity from early, slightly above average during the day and near average in the evening. Light NNW to NE winds from early in the day, then calm during the rest of the early hours and in the early morning except for some W to SW in the early morning, N to ENE winds in the morning with some ESE to ENE winds later in the morning, SE to NNE in the early afternoon that became E to NE before N to NE winds from the mid-afternoon. Later in the evening were light N to NW winds.
• 22/12/20: Partly cloudy with Cu and Sc clouds and cloudy in the afternoon. Warm early in the day that eased to slightly warm in the morning. Some brief light showers in the mid and late afternoon and some light showers later in the evening. The temperature was variable from the mid-morning to the mid-afternoon. Slightly warm during the day before easing to near average from the mid-afternoon as the temperature fell. The temperature fell slowly in the early evening and became slightly warm and became warm later in the evening and as the temperature fell slowly. Dew point was slightly above average from early, fell slowly in the early hours, rose slowly in the morning, and became stable from later in the morning, and then became moderately high in the mid-afternoon as the dew point rose briefly, after which the dew point fell and returned to slightly above average. Later in the evening the dew point rose a little. Relative humidity was near average in the early hours, slightly below average in the early morning and was near average until the mid-afternoon while the relative humidity fell. From the mid-afternoon the relative humidity rose and became moderately high, that then eased to near average from the late afternoon. In the evening, the relative humidity was slightly below average after initially and temporarily falling. Light NNW to NW winds at times in the early hours with calm winds otherwise, and NNE to NW winds in the morning becoming N to NW in the afternoon with some variable winds, then NNE to E in the mid-afternoon that veered from later in the afternoon to WNW to WSW with some W winds in the evening.
• 23/12/20: Partly cloudy with Cu and Sc clouds with increasing Ci clouds in the afternoon. Warm early in the day as the temperature fell slowly or was stable. In the morning as the temperature rose steadily the temperature eased to slightly warm. From the early afternoon the temperature eased further to near average after the maximum temperature was reached. Later in the evening the temperature became slightly warm after the temperature rose slowly in the evening. In the early hours, the dew point fell slowly slightly above average, more slowly in the morning and became near average. Later in the morning the dew point became moderately low after the dew point started to fall from later in the morning to the early afternoon. After a wind change the dew point rose briefly and returned to near average and rose slowly during the rest of the afternoon. Later in the afternoon and early in the evening the dew point fell slowly, became slightly below average and was stable later in the evening. Relative humidity was slightly below average early before becoming moderately low as the relative humidity fell before easing to slightly below average or near average from the mid-afternoon after rising with the wind change. Light W to WSW winds in the early hours, W to SW that became SSW to SW in the early morning before WSW to SSW in the morning, shifted to WNW to SSE in the late morning, WSW to ESE in the early afternoon before an ESE to ENE wind change after which the wind slowly veered to E to SE early in the evening. S to SE winds later in the evening.
• 24/12/20: Partly cloudy early before the cloud increased from the mid-morning and became cloudy with Cu and Sc clouds. In the mid-morning, the temperature stopped rising temporarily and rose more slowly through to the maximum temperature in the mid-afternoon that became slightly cool in the mid-morning and cool from the late morning. From the late afternoon the temperature returned to near average and then was slightly warm later in the evening as the temperature fell a little slowly in the evening. Dew point was stable in the early hours and was slightly below average that became near average for the rest of the day, rose in the early morning before stabilising in the morning, fell a little early in the afternoon, rose a little in the mid-afternoon before falling slowly later in the afternoon and have been stable in the evening. Relative humidity was moderately low in the early hours before returning to slightly above average or near average during the day and was slightly below average in the evening while the relative humidity rose slowly. Light S to SW winds at the start of the day became calm, then S to SW winds in the early morning backing during the morning to E to SE in the morning, variable winds between N and SE in the afternoon, ESE to ENE from the mid-afternoon and became calm later in the evening.
• 25/12/20: Partly cloudy and cloudy at times with Cu and Sc clouds. Slightly warm in the early hours as the temperature fell slowly. Variable temperature from the mid-morning to the mid-afternoon. Slightly cool in the afternoon. Dew point rose slowly and was near average from early, became stable in the morning, rose slowly in the afternoon before falling from later in the afternoon. Relative humidity was slightly below average from early, near average in the morning, became slightly above average in the afternoon as the relative humidity became generally stable, near average later in the afternoon and early in the evening and was slightly below average during the rest of the evening. Calm winds early, then S to SW winds in the morning, followed by NNW to NW winds that became variable in the morning, then ESE to NE from later in the morning, E to NE from the mid-afternoon that became ESE to ENE in the evening before calm winds late in the evening.
• 26/12/20: Partly cloudy with Cu and Sc clouds. Slightly cool in the afternoon after the temperature fell a little following the maximum temperature that was reached in the middle of the day. From the late afternoon the temperature returned to near average. Variable temperature from the mid-morning to the mid-afternoon. Stable and near average dew point in the early hours, rose early in the morning, generally fell from the mid-morning, and became slightly below average later in the morning and stabilised in the afternoon while returning to near average. In the evening, the dew point fell slowly. Relative humidity was slightly below average from early, became near average from the morning and was slightly below average in the evening. Calm winds early, light S to SW winds followed by S to SE winds in the early morning became SE to NE, ESE to ENE winds from later in the morning, E to NE later in the afternoon, then E to SE during in the evening before calm winds.
• 27/12/20: Mostly sunny with Cu clouds. Near average temperature over the entire day. The temperature was slightly variable from the mid-morning to the mid-afternoon. Dew point was near average that slowly fell in the early hours, rose in the morning generally, became stable in the afternoon that fell very slowly from later in the afternoon before becoming stable in the evening. Relative humidity was near average early that became slightly below average in the morning as the relative humidity fell quickly before becoming stable close to average from the morning. From later in the morning the relative humidity generally rose slowly, became briefly moderately high in the early afternoon before near average relative humidity during the rest of the afternoon, while the relative humidity rose slowly. In the evening, the relative humidity was slightly below average or near average. Calm winds early, then SSE to SW winds in the early morning became E to NE with some N to NE winds. Light E to NE winds late in the morning became ENE to NNE in the afternoon that slowly backed during the afternoon to N to NE in the evening before N to NW winds later in the evening with periods of calm winds.
• 28/12/20: Mostly sunny with cu clouds and ci clouds in the afternoon. Near average temperature from early in the day, that became slightly warm in the late morning and early afternoon after the temperature rose quickly in the morning. In the afternoon, the temperature returned to near average before becoming slightly above average in the evening. Dew point fell slowly in the early hours, rose, and fell twice in the morning and afternoon close to average, rose slowly in the evening, then became stable before falling slowly later in the evening while remaining close to average. Relative humidity was slightly below average at the start of the day, then was near average later in the early hours, was near average during the day and slightly below average in the evening. Calm winds early before light N to NW winds in the early morning tended to N to NE from the mid-morning, became NNE to E in the early afternoon that tended to ENE to NNE and then NNE to NE from later in the afternoon. In the evening, the wind became N to NW before calm winds later in the evening.
• 29/12/20: Partly cloudy in the morning becoming cloudy with Cu, Sc and As clouds. A few drops of rain in the late evening. Near average or slightly warm temperature in the early hours, returning to near average from the morning, becoming warm in the evening while the temperature fell slowly. Dew point slowly fell in the early hours close to average, rose from the early morning slightly above average, fell a little from the mid-morning, remained slightly above average that rose slowly in the late morning and early afternoon and became stable during the rest of the afternoon and in the evening. Relative humidity was slightly below average in the early hours and returned to near average in the morning, was slightly above average in the afternoon, moderately high briefly in the mid-afternoon, after the relative humidity stopped falling from the late morning. In the evening, the relative humidity returned to near average. Calm winds early became N to NE with some E to NE winds in the morning, light N to NW winds in the late morning, then E to NE in the afternoon and N to NE from the mid-afternoon.
• 30/12/20: Cloudy with Cu and Sc clouds. Some drizzle in the early morning, some very brief light showers and periods of drizzle in the morning and occasionally in the afternoon and evening. Warm early in the day as the temperature fell slowly or was stable, returned to near average in the morning and became cool during the morning as the temperature stopped rising in the mid-morning and generally fell during the rest of the morning and in the afternoon. Later in the afternoon the temperature eased to slightly cool to near average in the evening as the temperature fell. Dew point fell slightly in the early hours and became stable in the morning slightly above average, fell very slowly in the afternoon close to average before falling very slowly from the late afternoon. Relative humidity was slightly below average in the early hours that was stable before falling slowly in the morning and returned to near average, was generally stable during the morning and afternoon that became high from the late morning that eased from later in the afternoon to slightly above average during the evening after the relative humidity started to rise from the late afternoon. Light E to NE winds in the early hours with some calm winds, then E to SE winds in the early morning before E to NE winds from the mid-morning became N to NW from the late morning with some N to NNW winds in the afternoon, before backing from later in the afternoon to E to SE winds early in the evening to S to SE later in the evening.
• 31/12/20: Some light showers in the early hours and early morning. A light shower in the early afternoon. Slightly warm in the early hours, that returned to near average from the morning but was quite variable from the mid-morning to the mid-afternoon. In the early afternoon, the temperature was temporarily slightly cool. Slightly warm in the evening. Slightly above average dew point was stable in the early hours, rose in the morning that became stable before falling from later in the morning while returning to near average. In the early evening, the dew point rose a little before falling slowly later in the evening. Relative humidity was near average in the early hours and slightly above average or moderately high relative humidity during the day that was rather variable, which temporarily rose in the early afternoon with the shower. In the evening, the relative humidity was near average or slightly below average. Light S to SW winds in the early hours with some calm winds, that backed during in the morning to E to SE from later in the morning, then veered in the evening to S to SE and then to S to SW in the late evening.

 

Station records for December 2020

NOTE: This is a summary of the aforementioned monthly records exceeded over a monthly basis. Additionally, it lists records that are the lowest or highest in at least 5 years. See end notes for more information about record periods.

 

Record high December mean daily minimum temperature in at least 5 years
Observed [C]	Most recent higher	Years of record	Monthly average
20.8	21.1 in 2009	11	19.2
Record low December mean daily maximum temperature in at least 5 years
Observed [C]	Most recent lower	Years of record	Monthly average
30.3	=30.3 in 2015	11	30
Record high December daily minimum temperature
Observed [C]	Old record	Years of record	Monthly average
16.6 on 27th at 4:46 AM	=16.6 in 2009 on 3rd	11	19.2
Record low December daily maximum temperature at least 5 years
Observed [C]	Most recent lower	Years of record	Monthly average
35.9 on 6th at 11:38 AM	35 in 2015 on 11th at 1:30 PM	11	30
Record low December lowest daily maximum temperature in at least 5 years
Observed [C]	Most recent lower	Years of record	Monthly average
20.9 on 12th at 9:31 AM	24.4 in 2009 in 21st	11	30
Record high December highest daily minimum temperature
Observed [C]	Old record	Years of record	Monthly average
26.2 on 7th at 4:28 AM	24.5 in 2012 on 18th at 4:00 AM	11	19.2
Record high December minimum MSL pressure in at least 5 years
Observed [hPa]	Most recent higher	Years of record	Monthly average
1004.1 on 6th at 4:33 PM	1005.9 hPa in 2015 on 11th at 4:40 PM	11	1011.2
Record high December mean daily minimum relative humidity in at least 5 years
Observed [%]	Most recent higher	Years of record	Monthly average
54.4	56.7 in 2011	11	50.8
Record high December mean relative humidity in at least 5 years
Observed [%]	Most recent higher	Years of record	Monthly average
73.4	75.6 in 2011	11	70.8
Record high December mean daily maximum dew point
Observed [C]	Old record	Years of record	Monthly average
22.4	21.7 in 2017	11	20.8
Record high December mean dew point in at least 5 years
Observed [C]	Most recent higher	Years of record	Monthly average
20.1	=20.1 in 2010	11	18.6
Record low December highest wind speed in at least 5 years
Observed [km/hr]	Most recent lower	Years of record	Monthly average
21 on 7th at 2:27 PM	25 in 2018 on 21st at 5:45 PM	10	10.5
Record low December mean maximum wind gust in at least 5 years
Observed [km/hr]	Most recent lower	Years of record	Monthly average
28.1	26.3 in 2014	10	24.2
Record high December highest total rainfall total in at least 5 years
Observed [mm]	Most recent higher	Years of record	Monthly average
145.9	450.1 in 2010	9	129.2
Record high December highest daily rainfall total in at least 5 years
Observed [mm]	Most recent higher	Years of record	Monthly average
70.1 on 14th	82 in 1999 on 28th	33	41.8
Record low December maximum rainfall rate in at least 5 years
Observed [mm/hr]	Most recent lower	Years of record	Monthly average
56.2 on 1st at 3:48 PM	55.2 in 2012 on 10th at 12:45 PM	33	89.1

 

Key records for December 2020

NOTE: These records are drawn from automatic data record for this site. See end notes for more information.

 

All time records

No records

 

Monthly records

No records

 

Data summary tables for December 2020