Greater Melbourne in December 2022: close to average rainfall

Rainfall in December was close to average at most reporting sites in Greater Melbourne. Both mean maximum and mean minimum temperatures were generally within one degree of average.

Close to average rainfall

  • Rainfall in December was close to average at all reporting sites in Greater Melbourne except at Melbourne Airport where it was nearly double the December average due to thunderstorms and heavy rainfall on the 22nd.
  • The highest daily rainfall total in Greater Melbourne this month was 60.4 mm at Melbourne Airport to 9 am on the 23rd.
  • The wettest place was Kinglake West where 122.2 mm were recorded for a month.

A warm end of the month

  • After a generally cold first half of December due to a series of cold fronts, temperatures across Greater Melbourne started to increase, culminating in the first heatwave this summer that developed between the 25th and 27th.
  • The lowest daytime temperature recorded in Greater Melbourne this December was 11.4 °C at Wallan (Kilmore Gap) on the 14th.
  • Melbourne's hottest days were on the 26th and 27th when warm northerly winds resulted in maximum temperatures in the high-30s at most sites.
  • The highest temperature recorded for the month was 38.4 °C at Laverton RAAF on the 27th.
  • The coldest nights were at Viewbank, where the mean minimum temperature was 0.9 °C below the December average.

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 42.4 mm, which is 82% of the long-term average of 51.5 mm.
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 23.9 °C.
  • The warmest day was 37.3 °C on the 27th, and the coolest day was on the 14th when the temperature reached 15.8 °C.
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 13.3 °C.
  • The coldest morning was 8.1 °C on the 10th, and the warmest morning was on the 28th when the minimum temperature was 25.0 °C.

Thunderstorms and flash flooding

  • Thunderstorms that moved over Greater Melbourne on the 22nd generated heavy rainfall, strong winds and hail, resulting in damage to homes in Melbourne's northern suburbs. Many households were left without power due to fallen trees and damaged powerlines, while Melbourne Airport grounded flights because of flooded terminals and the risk of lightning.

Further information

Media
(03) 9669 4057

Extremes in December 2022
Hottest day 38.4 °C at Laverton RAAF on the 27th
Warmest days on average 25.0 °C at Coldstream
Coolest days on average 20.7 °C at Ferny Creek
Coldest day 11.4 °C at Wallan (Kilmore Gap) on the 14th
Coldest night 3.2 °C at Wallan (Kilmore Gap) on the 14th
Coolest nights on average 10.0 °C at Coldstream
Warmest nights on average 13.3 °C at Melbourne (Olympic Park)
Warmest night 27.0 °C at Scoresby Research Institute on the 28th
Warmest on average overall 18.6 °C at Melbourne (Olympic Park)
Coolest on average overall 15.6 °C at Ferny Creek
Wettest overall 122.2 mm at Kinglake West (Wallaby Creek)
Wettest day 60.4 mm at Melbourne Airport on the 23rd
Strongest wind gust 91 km/h at South Channel Island on the 12th




Summary statistics for December 2022
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
December
2022
Diff
from
average
Highest for
December
2022
Mean for
December
2022
Diff
from
average
Lowest for
December
2022
Total for
December
2022
Average
for
December
Rank of
December
2022
Fraction of
December
average
Cerberus 22.5 0.0 37.5 27th 12.2 +0.2 5.0 10th 47.2 52.7 average 90%
Coldstream 25.0 -0.3 36.1 26th 10.0 +0.1 3.4 10th 71.8 58.3 high 123%
Essendon Airport 24.4 -0.2 37.5 27th 12.2 +0.2 6.2 10th 59.0 51.5 average 115%
Ferny Creek 20.7 -1.2 32.3 26th 10.6 -0.7 3.7 14th 115.6 95.1 average 122%
Frankston (Ballam Park) 23.4   36.7 27th 12.5   8.0 16th 55.4
Laverton RAAF 23.6 -0.3 38.4 27th 12.4 +0.3 5.6 10th 38.0 45.8 average 83%
Melbourne (Olympic Park) 23.9   37.3 27th 13.3   8.1 10th 42.4 51.5 average 82%
Melbourne Airport 24.1 -0.6 36.7 27th 11.6 -0.5 5.2 10th 97.6 51.1 v high 191%
Moorabbin Airport 23.6 -0.4 37.9 27th 12.7 0.0 6.9 10th 60.8 59.6 average 102%
Scoresby Research Institute 24.5 +0.3 36.5 27th 11.4 -0.5 4.7 10th 61.8 74.2 average 83%
Viewbank 24.9 -0.9 37.4 27th 11.8 -0.9 5.3 10th 62.6 65.8 average 95%
Wallan (Kilmore Gap) 21.5 -0.9 33.5 26th 10.1 -0.2 3.2 14th 41.8 45.6 average 92%

Daily maximum temperatures for December 2022
12345678910111213141516171819202122232425262728293031
Cerberus18.227.933.618.519.117.916.016.923.428.917.417.916.417.018.920.621.823.924.225.523.321.619.828.825.437.524.419.424.826.0
Coldstream20.226.730.632.917.622.021.616.818.825.527.417.218.216.517.720.222.023.226.727.128.627.427.827.133.136.135.826.821.330.231.0
Essendon Airport19.323.931.234.119.020.720.316.818.326.528.617.817.716.317.419.722.424.025.627.629.325.224.125.032.631.437.526.319.327.330.1
Ferny Creek14.722.426.829.513.317.517.212.614.721.923.913.012.212.013.615.117.318.921.122.124.423.223.121.929.332.332.224.318.826.926.5
Frankston (Ballam Park)19.024.030.033.318.420.019.616.218.125.429.116.517.116.216.718.720.821.724.524.926.223.624.723.930.830.036.724.219.327.328.3
Laverton RAAF18.822.730.535.118.520.120.016.617.324.129.517.717.816.617.619.520.922.024.525.527.026.024.123.329.827.638.426.919.926.728.1
Melbourne (Olympic Park)18.821.431.034.518.120.019.316.017.625.928.617.317.915.816.620.322.323.726.027.329.425.223.123.531.927.537.327.619.326.230.3
Melbourne Airport18.924.330.733.818.820.720.216.317.226.728.617.118.416.116.519.121.923.024.827.428.625.624.225.032.232.836.726.118.628.429.6
Moorabbin Airport20.123.329.934.717.920.819.216.318.825.029.717.517.916.118.120.221.622.525.625.927.624.221.722.530.725.537.926.720.225.629.2
Scoresby Research Institute19.725.830.233.217.621.820.516.318.925.928.317.416.816.418.219.521.322.225.326.028.924.425.425.133.034.336.527.919.830.131.8
Viewbank20.425.830.734.117.422.121.416.818.926.428.717.317.616.517.320.622.423.826.527.929.326.625.026.134.234.437.427.119.529.931.3
Wallan (Kilmore Gap)16.423.626.929.215.418.019.011.814.921.322.213.315.011.413.316.719.621.022.424.324.223.923.723.830.033.533.123.418.427.928.4
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 December 2022
12345678910111213141516171819202122232425262728293031
Cerberus13.07.512.613.514.38.09.310.85.011.09.011.412.07.212.410.311.59.315.512.215.99.415.117.022.712.715.417.6
Coldstream10.85.910.012.415.312.49.86.86.33.411.010.89.75.95.66.66.06.94.95.08.215.711.614.98.814.415.120.813.08.512.5
Essendon Airport11.58.111.815.515.012.111.17.58.76.213.511.010.17.69.810.79.49.49.99.911.816.114.715.410.815.116.626.013.212.316.8
Ferny Creek9.17.512.518.712.29.19.74.75.65.911.98.26.43.76.86.97.98.08.48.710.813.513.912.710.715.219.724.19.610.414.7
Frankston (Ballam Park)9.58.613.116.014.811.910.79.38.812.711.311.19.310.38.09.412.011.011.011.515.114.415.911.916.016.423.911.512.616.9
Laverton RAAF12.511.411.714.815.312.610.97.910.75.614.311.09.57.410.511.912.412.38.07.710.015.813.416.010.515.016.925.514.612.216.5
Melbourne (Olympic Park)12.19.413.617.316.213.413.19.49.98.114.011.511.69.011.110.810.911.79.810.212.916.815.716.712.917.017.725.014.012.617.9
Melbourne Airport12.27.612.414.714.711.210.56.87.65.213.510.98.76.89.410.57.97.68.48.110.715.512.815.110.814.416.625.113.213.915.7
Moorabbin Airport10.410.413.316.815.412.611.48.89.66.912.812.011.68.810.510.19.711.39.99.810.515.816.116.812.017.416.824.711.611.917.2
Scoresby Research Institute10.47.513.115.112.110.57.87.74.713.011.010.67.07.08.18.511.06.06.38.515.613.816.110.916.116.027.013.310.117.6
Viewbank11.07.712.014.515.612.210.87.88.55.313.110.710.47.89.28.49.78.88.47.710.716.014.716.210.916.416.324.613.010.417.4
Wallan (Kilmore Gap)8.66.911.117.412.08.39.94.04.85.812.88.05.73.25.86.26.37.28.38.512.113.713.312.110.315.720.421.09.610.413.2
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 December 2022
12345678910111213141516171819202122232425262728293031
Bonbeach (Carrum (Patterson River Countr - - - - - - - 9.2 - - - 18.0 4.0 6.0 - - - - - - - 7.0 4.0 - - - - - - - -
Bullengarook East 0.6 0.2 - - - 3.4 0.6 1.6 0.4 - 0.2 17.0 2.8 1.8 5.4 6.8 1.2 - 0.2 - - 2.8 24.8 - - - - - 1.8

Burnside 1.0 - - - - 3.0 - - - - - 17.0 5.0 6.0 4.0 2.0 - - - - - 5.0 15.1 - - - - - 0.5 - -
Cape Schanck - - - - 1.0 5.8 - 2.0 - - - 28.4 - 4.8 1.8 - - - - - - 0.8








Cerberus - - - - 0.8 2.8 0.2 2.8 - - - 23.4 3.6 10.4 0.2 0.2 - - - - - 0.4 2.2 - - - - - 0.2 - -
Cheltenham Kingston Centre - - - - - - 2.0 1.0 - - - 8.8 6.4 1.6 0.4 - - - - - - 7.0 1.3 - - - - - - - -
Coldstream - - - - 0.2 2.2 0.2 12.8 1.4 0.2 - 22.2 13.0 13.0 3.0 0.2 0.2 - - - - 1.8 1.4 - - - - - - - -
Eltham 0.2 - - - - 6.2 - 6.2 - - 15.0 6.6 10.0 3.4 - - - - - - 3.4 9.0







Essendon Airport - - - - - 7.4 - 0.2 0.2 - - 14.6 5.6 6.0 7.8 0.2 - - - - - 4.4 12.0 - - - - - 0.6 - -
Ferny Creek 0.4 - - - 0.2 21.0 0.2 13.6 - - - 28.2 19.6 17.2 4.4 - - - - - - 4.8 2.8 0.2 - 0.2 - - 2.8 - -
Frankston (Ballam Park) - - - -
3.4 0.2 6.4 0.2 - - 21.6 3.0 7.0 3.8 1.2 - - - - - 3.6 4.4 0.2 - - - - - - 0.4
Greenvale Reservoir - - - - - 5.4 - - 0.6 - - 16.0 4.2 2.8 11.0 0.4 - - - - - 4.0 36.8 0.2 - - - - - - -
Hesket (Straws Lane) 1.0 - - - - 1.6 0.8 0.4 1.4 - - 14.6 2.8 2.0

13.0 - - - - 2.2 1.0 - - - - - 0.8 0.2 -
Kinglake West - - - - - 18.4 - 1.2 2.4 - - 26.8 12.6 16.0 5.0 1.2 - - - - - 2.2 18.2 - - - 12.8 - 0.8

Kinglake West (Wallaby Creek) - - - - - 28.4 0.2 0.2 0.8 0.2 - 27.2 11.0 16.2 12.8 0.4 0.2 - - - - 1.6 22.0 0.2 - - - - 0.6 - 0.2
Koo Wee Rup 0.2 - - - 0.2 8.0 - - 5.8 - - 21.6 7.2 12.2
















Lancefield - - - - - - - - - - - - 14.8 0.8 4.8 2.2














Laverton RAAF - - - - - 2.4 - 0.2 0.2 - - 14.2 3.0 6.6 2.6 - - - - - - 5.2 3.6 - - - - - - - -
Melbourne (Olympic Park) - - - - - 1.2 0.2 0.6 2.4 - - 17.4 3.2 6.2 3.4 - 0.2 - - - - 5.2 1.6 - - - - - 0.8 - -
Melbourne Airport 0.2 - - - - 1.0 0.2 - - - - 13.2 5.6 6.6 4.8 1.4 - - - - - 4.0 60.4 0.2 - - - - - - -
Melbourne Botanical Gardens - - - - - 1.2 - - 3.4 - 0.2 18.4 3.4 6.0 4.0 - 3.0 - - - - 6.0 2.0 - - - - - 1.2 -
Mitcham 0.2 1.2 - - - 7.2 0.2 12.0 3.0 - - 17.0 14.0 13.2 5.2 - - - - - - 3.4 3.2 - - - - - 0.4 - -
Monbulk (Spring Road) - - - - - 8.4 - 16.4 0.6 - - 20.0 19.8 15.4 4.8 - - - - - - 5.0 5.4 - - - 10.0 - 2.6

Moorabbin Airport - - - - - 0.2 - 5.0 2.0 - - 20.2 9.0 5.4 2.6 0.4 - - - - - 8.0 8.0 - - - - - - - -
Mornington - - 0.4 2.2 - 2.1 - 28.0 3.2 7.2 3.0 - - - - - - - 14.8 - - - - -


Mount Waverley (Riversdale Golf Club) - - - - - 2.0 - 4.0 6.0 - - 11.0 23.3 6.5 7.0 0.4














Newham (Cobaw) - - - - - - - - - - 13.2 - 5.0 3.8 - - - - - - 2.2








Oakleigh (Metropolitan Golf Club) - - - - - - - 6.0 - - 12.6 15.6 10.0 - - - - - - 10.0









Preston Reservoir - - - - - 6.8 - - 1.2 - - 15.6 5.4 10.0 11.0 0.6 - - - - - 4.4 12.8 - - - - - 1.0 - -
Rosebud (Country Club) - - - - 0.6 2.4 - - - - - 26.4 3.0 7.6 - - - - - - - - 4.4







Scoresby Research Institute 0.4 - - -
9.0 - 8.8 1.2 - - 17.2 7.8 8.6 2.2 - - - - - - 4.4 1.8 - - - - - 0.4 - -
Springvale (Sandown) - - - - 2.0 0.6 2.0 6.0 - - 6.4 14.6 5.2 1.8 0.4 - - - - - - 7.4 - - - - - - - - -
Springvale Necropolis - - - - - 5.0 - 5.0 5.0 - - - 27.5 - 6.5















Toorourrong Reservoir (Toorourrong) - - - - - 7.2 0.2 - 1.0 - - 18.6 7.6 8.8 9.4 0.4 - - - - - 1.4 12.0 - - - - - - - -
Upper Plenty - - - - - 5.8 - 0.8 1.2 - - 18.8 2.6 4.8 9.2 - - - - - - 2.0 8.4 0.2 - - - - 0.4 - -
Viewbank 1.0 - - - - 7.6 - 2.0 1.6 - - 17.2 4.8 13.8 3.2 - - - - - - 4.6 6.2 0.2 - - - - 0.4 - -
Wallan - - - - - 2.0 - - - - - 0.4 1.2 2.4 8.4 - - - - - - 1.2 8.0







Wallan (Kilmore Gap) 0.2 0.2 - - - 2.4 0.2 1.0 0.4 - - 16.4 2.0 1.6 8.2 0.2 - - - - - 1.4 7.4 - - - - - - 0.2 -
Willowmavin (Avalon Station) - - - - - - - - 0.2 - - 19.0 0.8 2.0 6.8 0.2 - - - - - 0.6 10.4 - - - - 0.2 - - -
Woodend - - - - - 0.6 0.6 0.8 0.4 - - 15.0 3.2 2.4 5.6 4.2 - - - - - 3.2 0.8 - - - - 0.2 0.4 0.2
Yan Yean 0.2 - - - - 9.2 - - 1.2 - - 19.0 5.4 16.6 12.6 - - - - - - 2.4 14.4 0.2 - - - - - - -
Yarra River @ Warrandyte












0.8
















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 third 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 Tuesday 3 January 2023. 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

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