Greater Melbourne in August 2018: drier than average with cool nights

August rainfall in Greater Melbourne was below average in most suburbs, but was close to average in some parts of the north and east. Daytime temperatures were generally close to average, while more than a week of cold nights towards the end of the month resulted in below average mean minimum temperatures.

Drier than average

  • August rainfall was slightly below average in most suburbs
  • At Melbourne (Olympic Park), the count of 16 rain days for the month was close to the city's long-term average
  • Rainfall totals ranged from 44% of average at Melbourne Airport to 115% of average at Coldstream
  • On the 19th, snow and graupel fell in the Dandenong Ranges, covering the ground around Ferny Creek in a white blanket

Cool nights late in the month

  • Daytime temperatures for August were generally close to average in Greater Melbourne
  • Mean maximum temperatures ranged from 0.2 °C cooler than average at Coldstream and Viewbank to 0.7 °C warmer than average at Essendon Airport
  • Night time temperatures tended to be cooler than average for August
  • Towards the end of the month, clear skies and dry air resulted in more than a week of colder than average nights
  • In the city, Melbourne Olympic Park's coldest temperature for the month was 0.8 °C on the 29th, which was the city's coldest in August since 0.8 °C on 5 August 1997, and the city's coldest morning so late in the season since 0.3 °C on 2 September 1957
  • North of the city, Melbourne Airport recorded −2.0 °C on the 29th, the site's coldest temperature in August since −2.5 °C on 11 August 1986
  • Mean minimum temperatures for August ranged from 1.2 °C cooler than average at Cranbourne and Viewbank to equalling the average at Essendon Airport
  • On the 29th, several sites had either their lowest August temperature on record
  • Melbourne Airport and Cranbourne Botanic Gardens had their lowest August mean daily minimum temperature for at least 20 years

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 42.8 mm
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 15.1 °C. The warmest day was 20.0 °C on the 10th, and the coolest day was on the 28th when the temperature reached 11.2 °C
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 7.2 °C. The coldest morning was 0.8 °C on the 29th, and the warmest morning was on the 15th when the minimum temperature was 11.5 °C

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Extremes in August 2018
Hottest day 20.0 °C at Melbourne (Olympic Park) on the 10th
Warmest days on average 15.1 °C at Essendon Airport, Laverton RAAF
, and Melbourne (Olympic Park)
Coolest days on average 10.5 °C at Ferny Creek
Coldest day 6.8 °C at Wallan (Kilmore Gap) on the 19th
6.8 °C at Ferny Creek on the 20th
Coldest night -4.2 °C at Coldstream on the 29th
Coolest nights on average 3.6 °C at Wallan (Kilmore Gap)
Warmest nights on average 7.2 °C at Melbourne (Olympic Park)
Warmest night 11.7 °C at Cerberus and Moorabbin Airport on the 15th
Warmest on average overall 11.1 °C at Melbourne (Olympic Park)
Coolest on average overall 7.2 °C at Wallan (Kilmore Gap)
Wettest overall 170.2 mm at Warburton (O'Shannassy Reservoir)
Driest overall 19.2 mm at Melbourne Airport
Wettest day 60.0 mm at Warburton (O'Shannassy Reservoir) on the 8th
Strongest wind gust 113 km/h at South Channel Island on the 19th

Record lowest August temperature
New record
(°C)
Old
record
Years of
record
Average for
August
Scoresby Research Institute -2.3 on the 29th = -2.3 on the 4th in 1997 51 6.3
Essendon Airport -2.4 on the 29th -2.2 on the 20th in 2003 49 5.7
Cerberus -2.5 on the 29th -2.4 on the 20th in 2003 27 6.6



Lowest August mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
August
Melbourne Airport 5.0 4.9 in 1994 5.9
Cranbourne Botanic Gardens 5.3 4.9 in 1997 6.5



Summary statistics for August 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
August
2018
Diff
from
average
Highest for
August
2018
Mean for
August
2018
Diff
from
average
Lowest for
August
2018
Total for
August
2018
Average
for
August
Rank of
August
2018
Fraction of
August
average
Cerberus 14.5 -0.1 19.2 3rd 6.0 -0.6 -2.5 29th 71.4 75.1 average 95%
Coldstream 14.5 -0.2 18.9 3rd 3.8 -0.6 -4.2 29th 79.8 69.5 average 115%
Cranbourne Botanic Gardens 14.5 -0.1 19.4 3rd 5.3 -1.2 -0.8 29th 67.6 80.4 average 84%
Essendon Airport 15.1 +0.7 19.4 10th 5.7 0.0 -2.4 29th 26.2 47.8 low 55%
Ferny Creek 10.5   14.8 3rd 4.3   1.2 12th 105.2
Laverton RAAF 15.1 +0.2 19.9 10th 5.3 -0.3 -2.1 29th 24.4 43.8 low 56%
Melbourne (Olympic Park) 15.1   20.0 10th 7.2   0.8 29th 42.8
Melbourne Airport 14.8 +0.4 19.2 10th 5.0 -0.9 -2.0 29th 19.2 43.7 v low 44%
Moorabbin Airport 14.9 0.0 19.5 10th 6.5 -0.4 -1.6 29th 47.6 64.9 low 73%
Scoresby Research Institute 14.6 +0.4 19.0 3rd 5.6 -0.7 -2.3 29th 63.8 79.8 average 80%
Viewbank 14.9 -0.2 19.1 10th 5.1 -1.2 -2.7 29th 52.4 54.8 average 96%
Wallan (Kilmore Gap) 10.8 +0.2 15.1 10th 3.6 -0.7 0.4 29th 43.4 61.4 low 71%

Daily maximum temperatures for August 2018
12345678910111213141516171819202122232425262728293031
Bundoora (Latrobe University)15.215.519.213.814.415.316.016.018.914.812.012.217.212.011.814.1
Cerberus14.615.919.214.817.913.413.815.615.718.312.713.013.716.515.514.315.612.812.411.512.513.515.915.815.213.712.912.312.112.914.6
Coldstream15.115.118.913.716.912.913.713.314.118.212.713.614.315.318.013.115.213.711.310.911.214.115.116.617.615.212.712.614.816.212.4
Cranbourne Botanic Gardens14.619.414.516.413.013.915.014.718.912.113.213.516.316.513.515.512.011.613.213.816.815.715.813.112.412.212.515.814.2
Essendon Airport14.315.418.114.716.714.014.516.114.219.414.114.815.116.318.115.616.114.012.412.912.514.516.416.217.114.913.111.913.615.315.9
Ferny Creek10.512.514.89.912.98.39.69.011.114.49.09.59.311.714.69.210.69.57.56.87.79.711.713.013.810.98.78.510.112.99.0
Frankston AWS12.915.818.013.716.612.212.514.718.211.012.212.4
Laverton RAAF15.215.418.315.217.314.314.816.614.619.914.414.614.918.017.514.915.814.712.212.912.613.516.315.815.414.512.412.112.615.016.2
Melbourne (Olympic Park)14.816.118.415.317.613.814.816.015.420.014.714.814.916.718.414.715.913.811.912.412.414.016.015.415.214.712.911.212.516.716.0
Melbourne Airport15.114.917.214.516.513.714.216.413.419.213.814.315.516.518.314.615.213.812.011.411.814.016.416.417.014.412.611.713.814.216.1
Moorabbin Airport13.916.519.514.718.214.014.816.215.219.512.913.915.016.517.314.315.713.311.911.712.313.515.914.514.113.513.612.413.316.416.2
Scoresby Research Institute14.815.319.014.217.312.514.314.414.518.611.913.614.016.417.814.314.913.812.111.312.313.516.016.516.813.313.112.114.016.112.8
Viewbank15.315.218.714.717.613.314.615.315.219.112.214.315.316.118.614.715.714.911.712.312.013.115.516.616.814.812.311.614.216.314.7
Wallan (Kilmore Gap)11.210.912.212.012.67.98.910.97.815.110.010.111.911.612.812.010.79.96.87.810.112.612.414.413.88.48.39.812.010.3
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 2018
12345678910111213141516171819202122232425262728293031
Bundoora (Latrobe University)7.01.87.66.25.48.73.06.810.75.35.36.76.21.51.3-1.71.3
Cerberus8.52.36.38.110.68.16.68.54.28.98.15.37.610.711.78.35.08.85.95.78.17.32.41.20.45.17.2-0.3-2.52.37.0
Coldstream4.6-0.24.25.79.98.46.67.70.66.77.90.76.06.210.42.42.07.65.24.45.57.60.2-0.5-0.90.00.1-3.0-4.2-0.46.2
Cranbourne Botanic Gardens4.17.410.58.36.56.53.95.64.76.89.66.54.28.05.04.97.17.83.63.52.94.43.71.0-0.81.96.8
Essendon Airport7.64.98.56.99.48.15.19.14.38.57.84.08.07.610.75.46.07.85.74.17.07.12.51.51.33.23.81.2-2.43.27.8
Ferny Creek4.94.97.04.57.14.93.03.52.25.54.71.22.85.87.64.14.24.62.02.03.74.75.05.55.74.22.51.71.55.06.7
Frankston AWS9.46.18.08.810.19.58.39.19.09.38.36.47.710.3
Laverton RAAF5.82.58.77.39.47.96.49.52.99.87.82.07.47.711.46.05.37.06.52.84.95.52.50.90.43.84.10.9-2.12.77.2
Melbourne (Olympic Park)9.94.97.88.010.69.47.39.65.69.48.15.47.99.411.58.77.78.96.75.58.68.75.64.83.94.96.81.90.84.88.9
Melbourne Airport6.63.47.84.98.27.55.38.72.98.37.53.18.26.410.64.65.06.95.33.85.15.53.92.22.12.02.9-0.4-2.02.47.1
Moorabbin Airport9.04.38.57.810.59.37.49.35.58.58.15.37.510.311.78.57.08.46.36.18.18.02.81.92.34.64.81.1-1.61.78.6
Scoresby Research Institute7.04.88.87.310.08.66.97.84.47.37.73.26.59.611.36.84.97.65.64.16.07.55.12.41.02.41.0-1.4-2.32.69.7
Viewbank7.52.04.07.510.18.56.38.62.77.27.93.26.29.311.07.04.57.95.74.66.92.71.81.02.52.9-1.6-2.71.66.3
Wallan (Kilmore Gap)3.92.43.93.84.14.22.73.93.04.53.91.64.53.85.62.93.24.42.02.04.14.63.86.45.44.62.10.80.43.44.4
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 2018
12345678910111213141516171819202122232425262728293031
Bonbeach (Carrum) 1.5 - - - - - - 6.0 - - 6.4 5.6 - - - - - 2.0 8.2 5.0 1.2 2.6 - - - - - - - - -
Bullengarook East 4.2 - - 14.0 - 1.8 3.6 8.4 0.2 - 5.8 2.2 0.2 - - 0.2 - 2.4 4.8 4.8 2.4 - 0.2 - - - 1.6 1.4 0.6 0.2 4.4
Bundoora (Latrobe University) 7.0 - - 1.2 - 2.4 3.0 - 8.6 - 0.2 - 7.0 1.4 0.6 - - 2.8 - - -
Burnside 3.0 - - 1.4 - - - - 1.4 - 5.8 1.2 - - - - - - 7.4 2.0 1.0 - - - - - 1.8 - - - 1.8
Cape Schanck - - - - - - - - - - - - - - - - - - - - - - - - - - 1.4 2.0 - - 5.8
Cerberus 2.6 - - 7.0 - 1.2 5.2 2.4 1.6 - 12.2 9.0 0.8 0.2 - 0.4 0.2 3.2 9.8 2.0 3.0 3.4 - 0.2 - - 3.6 0.2 - - 3.2
Cheltenham Kingston Centre 2.0 1.0 - 1.0 - - - 1.0 3.2 - 9.6 4.0 0.5 - - - - - 18.0 3.5 1.0 1.0 - - - - 1.8 - - - -
Coldstream 5.8 0.2 - 3.6 - 0.4 0.2 8.8 3.4 - 4.0 4.2 2.6 0.2 - 0.6 0.4 3.4 19.4 14.6 3.4 0.6 0.4 0.2 - 0.2 1.8 - - 0.2 1.2
Cranbourne Botanic Gardens 4.4 5.8 - 0.4 2.0 3.6 0.2 9.6 6.0 1.4 - - 0.2 - 3.6 12.8 2.4 4.6 4.0 0.4 1.6 - - 0.8 0.2 - - 1.6
Essendon Airport 4.2 - - 1.8 - - - 1.2 1.4 - 5.8 0.2 - - - 0.2 - 0.6 4.2 3.4 0.8 - - 0.2 - - 1.2 - - - 1.0
Ferny Creek 6.4 - - 6.2 - 1.2 0.6 5.6 5.6 - 11.2 8.2 6.4 1.6 - 1.6 1.6 7.6 11.2 10.2 8.2 6.8 0.2 - - - 4.0 - - - 0.8
Greenvale Reservoir 3.4
- 3.0 0.2 - 0.6 2.0 2.4
4.4



0.8 - 1.6 4.6
1.2 0.6


- 3.2 0.2 - -
Kinglake West 4.4 0.4 - 12.4 - 1.4 1.2 9.0 3.8 - - 1.0 1.6 1.0 - - - 5.8 12.0 12.2 6.8 2.2 0.6 - - - 5.4 - - - 7.6
Kinglake West (Wallaby Creek) 5.2 0.2 0.2 13.8
1.6 1.8 15.4 2.2 0.2 3.8 6.4 0.4 0.2
0.6 - 6.0 7.8
4.2 1.2


0.2 5.2
0.4 - 2.8
Lancefield 3.2 - - 15.8 - 2.0 5.2 11.6 3.2 - 2.6 2.4 0.4 - - 1.0 - 4.4 3.2 3.8 0.8 - - - - - 0.8 - - - 4.2
Laverton RAAF 0.6 - - 1.4 - - - 0.6 2.6 - 6.4 3.0 - - - - - - 6.0 1.4 - - 0.2 - - - 1.0 - - - 1.2
Main Ridge 0.6 - - 8.4 - - - 13.0 10.0 - 10.2 - 0.6 - - 2.8 8.2 2.8 9.2 - 5.2 - - - 1.8 1.4 - - 1.6
Melbourne (Olympic Park) 1.6 - - 1.6 - - - 1.0 2.2 - 10.4 4.6 - 0.2 - 0.2 - 2.2 9.2 2.0 1.2 1.0 - - - - 3.6 0.2 - - 1.6
Melbourne Airport 3.2 - - 2.4 - - - 0.8 0.6 - 3.6 0.2 - - - - - 0.2 4.0 1.2 0.8 0.2 - - - - 1.6 - - - 0.4
Mitcham 5.4
- 2.4
0.2 - 2.6 3.2
5.0 3.8 0.8 0.4
0.8 - 4.2 17.6
2.2 0.6


- 1.8 0.4 - 0.2 1.2
Moorabbin Airport 0.2 - - 2.2 - 0.2 - 3.6 1.6 - 11.4 6.6 0.4 - - - - 1.4 12.8 3.6 0.2 0.6 - - - - 2.4 - - - 0.4
Newham (Cobaw) 2.6 - - 19.6 - 1.4 4.0 16.4 5.0 - 3.4 3.0 0.8 - - - - 5.2 7.0 1.4 0.8 - - - - - - - - - 4.4
Oakleigh (Metropolitan Golf Club) 1.5 - - 1.8 - - - 3.2 3.4 - 8.9 7.3 - - - 1.0 - 4.2 13.2 5.2 2.2 - - - - - 2.8 - - - -
Preston Reservoir 7.2
- 1.2
- - 2.0 2.2
5.2 1.6 - 0.4 0.4 0.2 - 1.0 4.8
1.0 0.4


- 3.6 0.4 - - 1.6
Romsey 3.6 0.2 13.2


























Rosebud (Country Club) 4.0 - - 8.0 - - 4.0 0.8 2.6 - 10.0 6.0 - - - - 3.5 16.4 5.6 5.6 1.0 - - - 2.2 - - 4.0
Scoresby Research Institute 3.6 - - 3.0 - 0.4 - 3.4 4.0 - 6.2 2.8 0.8 0.2 - 1.2 0.6 5.0 13.2 10.2 4.4 2.2 - - 0.2 - 2.0 - - - 0.4
Springvale (Sandown) 0.6 - - 2.0 - - - 3.6 2.0 - - 14.2 0.6 - - 0.6 - 2.8 10.8 5.0 0.8 1.4 - - - - 2.0 0.6 - - 4.0
Springvale Necropolis 1.0 - - 3.0 - 4.0 3.0 - 17.0 - - 1.8 - 22.0 - - - - - - - - - - 4.0
Toolangi (Mount St Leonard DPI) - - - - - - - - 40.3 - - - - - 13.6 - - 38.2 3.2 - 5.6 - - - - 6.4 - - 4.8
Toorourrong Reservoir (Toorourrong) 4.6 0.2 - 9.6
0.6 0.2 6.8 0.8
1.4 2.8 -


- 2.8 3.8
3.0 0.2


- 4.4
0.2 0.2 2.0
Viewbank 10.0 - 0.2 1.2 - - - 1.6 2.2 - 6.2 4.0 - - - 0.6 - 1.8 8.8 7.2 1.6 0.6 - - - - 4.4 - - - 2.0
Wallan - - - 8.4 - 0.6 - 3.0 1.2 - 3.4 1.0 - - - - - 2.2 5.0 2.4 0.4 - - - - 3.8 - - - 3.8
Wallan (Kilmore Gap) 2.8 - 0.2 9.6 - 1.0 1.8 4.2 1.0 - 4.0 0.4 - - - 0.4 - 3.0 0.6 4.0 2.8 0.2 - 0.2 - - 3.4 0.2 0.2 - 3.4
Warburton (O'Shannassy Reservoir (Quarte 16.8 0.4 - 20.8 1.2 5.2 - 60.0 11.6

4.6 0.8 0.2
5.2 1.0 15.2 24.0
1.6



- 1.6
- -
Willowmavin (Avalon Station) 3.2 - 0.2 12.4 - 1.4 2.8 12.0 3.0 - 2.6 2.8 0.4 - 0.2 2.2 - 3.6 1.2 1.4 0.4 - - 0.2 0.2 - 0.6 0.4 0.2 - 4.2
Woodend 9.4 0.1 0.2 18.8 0.1 2.8 3.6 19.6 4.6 0.1 4.0 1.4 0.5 0.1 - - - 5.2 8.4 3.0 2.4 0.2 - - - - 1.6 0.6 - - 4.6
Yan Yean 4.6
- 4.4
0.6 - 4.6 3.6
5.0
0.4


- 2.6 7.2

0.6


-

- - 2.8
Yarra River @ Warrandyte 5.8 0.2 - 2.2 - 0.4 0.4 2.2 2.8 - 6.2 3.4 0.8 0.4 - 0.2 0.2 2.4 10.2 7.2 2.8 1.0 - 0.2 - - 1.8 - - - 2.0
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 9 am on Monday 3 September 2018. 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
Enquiries