Greater Melbourne in August 2021: below average rainfall, mild days and nights

August rainfall was below average at most locations across Greater Melbourne. Both daytime and night-time temperatures were above average.

Below average rainfall

  • August rainfall was less than average at most locations in the Melbourne metropolitan area.
  • Averaged across all reporting sites, rainfall in Greater Melbourne was the lowest for August since 2014.
  • Cold frontal systems and a southerly airstream delivered the most precipitation, with the heaviest falls on the 1st, 12th, 17th, 23rd and 24th.
  • The highest daily rainfall total this month, 23.8 mm, was recorded at Ferny Creek on the 1st.
  • With 88.2 mm, Ferny Creek was also the wettest location in Greater Melbourne this month.
  • At Melbourne (Olympic Park), the count of 18 days with recorded rain this month was close to the city's August average.

Mild days and nights

  • For the month as a whole, daytime and night-time temperatures were more than 1 °C above average at most reporting sites.
  • Mean maximum temperatures ranged from 0.8 °C above average at Ferny Creek to 1.5 °C above average at Essendon Airport.
  • The warmest day of the month was the 22nd, when most sites reported daytime temperatures above 20 °C.
  • The highest daytime temperature in Greater Melbourne this August was 22.2 °C, recorded at Melbourne (Olympic Park) and Moorabbin Airport on the 22nd.
  • The warmest nights were at Essendon Airport, where the mean minimum temperature was 1.8 °C above the August average.
  • Averaged across all reporting sites, the mean minimum temperature in Greater Melbourne was the highest for August since 2013.

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 49.6 mm.
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 16.4 °C.
  • The warmest day was 22.2 °C on the 22nd, and the coolest day was on the 26th when the temperature reached 12.9 °C.
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 8.5 °C.
  • The coldest morning was 4.6 °C on the 27th, and the warmest morning was on the 11th when the minimum temperature was 12.4 °C.

Further information

Media
(03) 9669 4057

Extremes in August 2021
Hottest day 22.2 °C at Melbourne (Olympic Park) on the 22nd
22.2 °C at Moorabbin Airport on the 22nd
Warmest days on average 16.4 °C at Melbourne (Olympic Park)
Coolest days on average 11.6 °C at Ferny Creek
Coldest day 8.3 °C at Wallan (Kilmore Gap) on the 24th
Coldest night 0.5 °C at Coldstream on the 2nd
Coolest nights on average 4.9 °C at Wallan (Kilmore Gap)
Warmest nights on average 8.5 °C at Melbourne (Olympic Park)
Warmest night 13.1 °C at Scoresby Research Institute on the 11th
Warmest on average overall 12.4 °C at Melbourne (Olympic Park)
Coolest on average overall 8.4 °C at Wallan (Kilmore Gap)
Wettest overall 88.2 mm at Ferny Creek
Wettest day 23.8 mm at Ferny Creek on the 1st
Strongest wind gust 91 km/h at South Channel Island on the 11th

Summary statistics for August 2021
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
August
2021
Diff
from
average
Highest for
August
2021
Mean for
August
2021
Diff
from
average
Lowest for
August
2021
Total for
August
2021
Average
for
August
Rank of
August
2021
Fraction of
August
average
Cerberus 15.7 +1.1 20.9 22nd 7.6 +1.0 1.6 28th 46.0 75.4 low 61%
Coldstream 15.6 +0.9 21.0 22nd 5.1 +0.8 0.5 2nd 63.6 71.6 average 89%
Essendon Airport 15.9 +1.5 21.6 22nd 7.5 +1.8 1.8 28th 44.6 48.1 average 93%
Ferny Creek 11.6 +0.8 17.2 22nd 6.0 +0.8 3.3 24th 88.2 122.0 low 72%
Frankston (Ballam Park) 15.3   20.9 22nd 8.1   5.0 28th 67.4
Laverton RAAF 16.3 +1.4 21.9 22nd 7.0 +1.4 2.1 28th 57.4 44.4 high 129%
Melbourne (Olympic Park) 16.4   22.2 22nd 8.5   4.6 27th 49.6
Melbourne Airport 15.8 +1.4 21.4 22nd 6.4 +0.5 1.7 27th 34.0 44.1 average 77%
Moorabbin Airport 16.2 +1.4 22.2 22nd 8.2 +1.3 2.0 28th 51.2 64.9 average 79%
Scoresby Research Institute 15.7 +1.4 21.2 22nd 7.4 +1.1 2.2 28th 49.4 79.5 low 62%
Viewbank 16.1 +1.1 21.7 22nd 7.2 +1.0 2.1 27th 47.2 56.4 average 84%
Wallan (Kilmore Gap) 11.7 +1.2 17.2 22nd 4.9 +0.7 2.0 24th 51.4 62.2 average 83%

Daily maximum temperatures for August 2021
12345678910111213141516171819202122232425262728293031
Cerberus14.315.313.713.714.914.514.615.615.718.317.515.816.016.218.114.113.514.317.118.018.520.914.313.113.611.712.818.115.117.719.8
Coldstream14.515.213.614.014.513.014.015.816.317.218.615.317.016.318.014.213.814.317.415.719.121.013.913.014.613.212.517.614.716.219.0
Essendon Airport15.014.714.114.815.113.914.615.615.617.918.315.517.217.718.414.014.415.617.016.519.521.615.112.513.012.814.217.115.817.019.8
Ferny Creek11.011.28.99.110.19.010.512.112.213.314.711.312.912.714.48.88.69.713.212.414.917.210.68.510.28.610.213.710.013.115.8
Frankston (Ballam Park)13.515.413.313.713.612.813.515.315.717.917.714.815.215.916.713.213.913.717.117.618.220.914.312.613.412.412.917.614.617.019.7
Laverton RAAF15.315.614.414.915.913.915.515.715.818.720.116.217.317.618.514.214.415.017.718.219.821.914.712.313.412.313.317.716.317.820.9
Melbourne (Olympic Park)15.715.414.514.515.814.215.516.416.417.719.216.617.618.419.014.413.915.517.417.320.022.214.313.114.112.913.617.816.217.620.1
Melbourne Airport14.814.713.614.115.513.914.815.215.217.817.916.117.117.418.114.413.915.316.916.919.821.414.412.012.612.315.017.115.417.020.0
Moorabbin Airport14.616.413.714.813.914.816.418.419.116.016.317.018.413.713.714.417.318.519.522.213.614.813.113.018.214.717.520.3
Scoresby Research Institute14.815.213.814.815.213.414.315.615.617.518.416.017.117.318.113.413.914.117.115.919.121.213.813.214.412.912.517.214.216.719.4
Viewbank15.115.414.315.015.613.314.515.716.417.618.716.217.717.118.614.514.314.816.716.620.021.714.412.814.513.213.217.816.316.819.9
Wallan (Kilmore Gap)9.610.412.69.910.412.110.512.712.911.512.711.513.511.010.011.312.011.915.117.29.98.38.99.213.412.511.312.015.1
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for August 2021
12345678910111213141516171819202122232425262728293031
Cerberus7.94.94.28.18.810.29.55.44.86.112.49.09.66.89.010.49.16.25.67.210.310.810.38.58.23.36.31.67.03.110.7
Coldstream4.50.52.56.27.79.38.52.81.85.112.62.13.41.14.99.28.49.14.33.56.87.19.51.02.42.21.40.76.02.69.4
Essendon Airport8.06.87.96.58.110.19.33.54.97.411.36.07.36.09.09.99.17.87.67.59.611.010.15.25.14.93.31.89.27.19.8
Ferny Creek4.55.15.34.05.36.66.05.36.18.09.93.45.65.27.06.46.35.96.17.97.79.86.33.33.93.93.75.96.25.58.6
Frankston (Ballam Park)7.05.67.87.78.810.09.86.96.38.712.39.08.95.39.39.69.38.46.38.310.310.410.05.56.05.37.45.08.85.910.2
Laverton RAAF5.85.66.46.37.29.68.04.05.67.412.37.06.24.98.39.78.67.64.79.09.010.19.76.05.54.23.22.19.25.010.3
Melbourne (Olympic Park)8.06.58.77.89.810.710.55.87.19.112.48.18.16.910.111.09.87.68.28.710.611.310.86.48.05.54.65.39.16.411.0
Melbourne Airport6.05.16.05.76.38.57.93.86.34.910.86.25.85.17.39.28.04.25.78.38.69.09.64.75.43.31.72.48.76.19.3
Moorabbin Airport8.25.66.78.39.510.310.14.86.29.212.87.78.67.110.010.39.67.58.29.210.410.710.47.36.34.54.52.09.76.810.7
Scoresby Research Institute6.25.55.37.28.99.79.15.45.38.013.16.97.86.38.59.69.28.87.69.510.010.69.72.43.72.92.82.28.96.610.4
Viewbank6.63.57.96.97.610.09.74.25.06.912.38.17.73.87.89.89.18.56.07.610.610.510.44.95.54.02.12.57.04.710.5
Wallan (Kilmore Gap)3.65.76.55.85.36.26.56.52.24.04.44.65.75.95.74.45.55.56.76.82.03.92.73.14.25.64.25.0
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily rainfall for August 2021
12345678910111213141516171819202122232425262728293031
Bonbeach (Carrum (Patterson River Countr 16.2 4.5 - 2.5 - - - - - - 4.8 - 2.0 - 4.0 - - 3.2 7.0 2.5 1.8 - 4.0
Bullengarook East 16.0 - 2.2 3.2 0.8 0.2 0.2 0.2 - - - 9.0 0.8 0.6 - 0.2 0.6 0.2 - 0.2 - - 6.2 9.6 3.2 0.4 - 0.2 2.2 1.0 -
Burnside 17.0 - 2.0 - - - - 1.2 - - - 3.0 - - - - 2.0 - - 1.0 - - - 7.5 4.0 0.9 - - - 1.0
Cape Schanck 14.4 - 2.0 4.6 8.4 1.4 - - - - - - - - - 5.0 8.4 - - - - - 4.6 - 2.4 - - - 3.0

Cerberus 8.8 - 0.2 4.0 8.6 - 0.2 1.0 - - - 5.2 0.2 - - - 6.6 0.2 - 0.2 - - 3.2 1.0 1.4 1.2 - - 3.8 0.2 -
Cheltenham Kingston Centre 19.2 - 3.2 0.6 - 0.2 - - - - - 1.0 0.2 - - 0.3 5.8 0.8 - - - 0.1 0.4 3.4 1.2 0.2 - - 0.6 1.2 -
Coldstream 22.6 - 3.2 8.0 3.0 0.2 0.6 - - - - 6.0 - - - 0.8 7.2 1.8 - 0.4 0.8 - 1.0 2.0 1.0 0.4 - 0.2 3.8 0.4 0.2
Eltham 18.8 - 1.2 2.8 2.0 - - 0.4 - - - - - - - 0.4 3.2 - - 1.6 - - 0.8 - 2.0 - - - 4.6 0.8
Essendon Airport 17.2 - 1.6 0.4 0.8 - 0.2 0.2 - - - 2.4 - - - 0.2 0.8 0.6 - 0.8 0.2 - - 8.6 5.4 0.4 - - 0.6 4.0 0.2
Ferny Creek 23.8 - 3.8 4.4 3.2 2.2 2.8 1.4 - - - 5.0 0.6 - 0.2 3.8 13.4 5.8 0.2 0.2 0.8 0.2 3.6 3.0 1.6 0.6 - - 5.8 1.8 -
Frankston (Ballam Park) 19.2 - 2.8 2.2 5.4 - - 0.6 - - - 3.2 - - - 0.2 13.0 4.6 - - - - 3.2 5.8 1.8 0.6 - - 3.4 1.4 -
Greenvale Reservoir 16.4 - 0.6 1.8 1.0 - - 1.8 - 0.2
2.6 - - 0.2

1.3 -

- - 6.0


-
0.2 -
Hesket (Straws Lane) 11.0 - 3.4 1.2 0.8 0.4 0.4 1.8 - - - 5.2 0.2 - - 0.4 0.4 0.6 - - 1.4 - 3.6 11.8 3.4 1.0 - - 4.0 1.0 -
Kinglake West 19.0 - 1.2 9.2 1.0 0.4 1.4 - - - 8.2 - - - 0.8 7.0 2.4 - - 1.0 - 6.6 3.4 1.6 1.0 - - 10.0 1.0
Kinglake West (Wallaby Creek) 22.2 0.4 1.4 3.6 4.8 0.8 - 1.0 0.2 -
10.0 - 0.4 0.2

2.4 0.2

- 6.4 4.4


0.2
3.6 -
Lancefield - - 2.2 1.0 - 0.4 - - 0.4 - - - - 0.4 - - - - 0.6 - 1.4 - 4.4 3.4 2.0 1.0 - - 10.0 1.0
Laverton RAAF 19.0 - 5.4 1.0 1.2 - - 0.2 - 0.2 - 3.0 - - - - 0.8 0.2 - 0.8 0.4 - 1.2 17.8 5.0 0.2 - - 0.2 0.8 -
Melbourne (Olympic Park) 18.0 - 4.8 0.6 0.4 0.2 - 0.6 - - - 2.8 - - - 0.2 0.4 0.6 - 0.8 1.0 - 0.8 10.4 2.2 1.2 - - 0.6 4.0 -
Melbourne Airport 16.2 - 0.4 1.6 0.8 0.2 - 1.4 - - 0.2 2.2 - - - - 0.4 0.4 - - - - 0.2 6.2 1.6 0.4 - 0.2 0.4 1.2 -
Melbourne Botanical Gardens 19.2 - 6.0 0.6 1.6 - 0.6 1.0 - - - 2.8 - 4.0 - 0.4 0.4 0.6 - 0.8 1.4 - 0.8 9.8 2.6 1.8 - - 1.2 3.6 -
Mitcham 20.8 - 4.2 1.8 0.6 0.4 0.4 - - -
3.8 - - -

2.2 -

- 1.2 2.0


-
4.0 -
Monbulk (Spring Road) 22.8 - 0.8 7.0 3.8 - 1.0 2.4 - - - 7.8 - - - 3.8 9.4 3.2 - - 2.8 - 5.0 8.0 - 1.4 - - 7.2

Moorabbin Airport 17.8 - 6.2 - - 0.2 - 0.2 - - - 4.0 - - - 0.6 5.2 1.2 0.2 0.2 0.6 - 1.2 5.2 2.8 0.8 - - 2.2 2.6 -
Mount Waverley (Riversdale Golf Club) 20.0 - 7.8 0.6 0.4 0.5 - - - - - 3.8 0.3 - - 0.3 3.0 1.6 - - - - 2.1 5.4 2.2 0.4 - - 3.2

Newham (Cobaw) 11.8 - - - 11.4 - 2.0 - 0.4 - 8.6 - 0.4 - 0.4 0.2 0.6 - - - 1.6 1.0 - 6.0 - 0.8 - - 7.0

Oakleigh (Metropolitan Golf Club) 18.8 - 8.4 0.8 - - 0.6 - - - - 4.2 - - - 1.4 4.2 1.2 - 0.8 - 9.0 3.2 1.0 - - 2.2 1.6
Preston Reservoir 20.2 0.2 1.4 0.6 1.0 - 0.2 0.6 - -
3.4 - - -

0.6 -

- - 7.8


-
5.2 -
Romsey 10.2 2.0 0.4 0.4 0.2 - 0.2





















Rosebud (Country Club) 14.4 - - 13.0 - - 0.6 - - - 3.0 - - - 7.2 - - - - - 3.2 4.8 - - - - 4.0
Scoresby Research Institute 19.2 - 3.8 0.8 - 0.4 - 0.4 - - - 4.4 0.2 - - 1.0 6.2 0.8 - - 1.2 - 2.4 3.4 1.2 - - - 3.8 0.2 -
Springvale (Sandown) 0.2 - 4.8 - - - - - - - - - - - - 1.4 4.4













Springvale Necropolis 21.0 5.0 - - - - - - - - 6.0 - - - - 6.0 - - - - - 5.0 - - 15.0
Toorourrong Reservoir (Toorourrong) 21.0 - 0.8 1.6 2.0 0.2 - 0.8 - -
4.8 - 0.2 -

1.2 -

- 1.8 3.2


-
2.4 -
Upper Plenty 16.8 - 2.6 2.0 1.8 - - 2.4 - - - 4.2 - - - 1.0 2.2 1.8 - - 0.6 - 2.0 5.2 3.6 1.6 - - 9.0 0.2 -
Viewbank 21.6 - 2.0 0.4 1.4 0.2 - 0.6 - - - 3.2 - - - 0.2 2.2 1.2 - 1.0 0.2 - 0.4 3.6 2.2 0.2 0.2
3.0 3.4 -
Wallan 15.8 - 1.4 0.8 1.2 - - 1.2 - - - 2.8 0.4 - - - 2.0 1.2 - - - 1.0 0.8 3.4 4.2 1.4 - - 10.6

Wallan (Kilmore Gap) 14.4 - 1.8 1.4 1.0 - - 1.6 - 0.2 - 2.4 0.4 0.4 0.2 0.2 1.6 1.4 0.2 - 1.0 0.2 1.0 2.8 5.8 1.2 0.2 0.2 11.6 0.2 -
Warburton (O'Shannassy Reservoir (Quarte 21.8 - - - - - - - - -
15.8 - 0.2 -

- -

- - 21.2


0.4
- -
Willowmavin (Avalon Station) 13.4 - 3.0 0.6 - - 0.2 0.4 - - - 5.4 0.6 0.4 0.2 0.2 - 0.2 0.2 - 1.8 - 4.4 1.2 1.2 0.8 0.2 - 13.0 0.4 -
Woodend 13.4 0.2 5.0 1.6 0.8 0.4 0.4 1.0 0.2 0.2 - 7.2 1.0 0.2 - 0.4 0.4 0.2 0.2 0.2 1.8 0.4 5.4 6.8 3.2 0.4 0.2 0.2 3.6 0.8 0.2
Yan Yean 15.8 - 0.2 3.6 1.6 - - 0.2 - -
4.2 - - -

1.0 -

- 1.0 3.4


-
2.8 -
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

The Monthly climate summary, generally published on the first working day of each month, lists the main features of the weather in Greater Melbourne using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This summary includes data from observing sites in or near the Greater Melbourne “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 10 am on Wednesday 1 September 2021. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites are long-term means based on observations from all available years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057

Climate