Greater Melbourne in May 2019: mild days and nights

Rainfall in May was above average across Greater Melbourne. Both daytime and night-time temperatures were warmer than average

Above average rainfall

  • Rainfall in May was above average at most sites across Greater Melbourne
  • The wettest days were on the 2nd, 10th, 11th and between the 26th and the 31st, when cold fronts brought mostly moderate falls
  • The wettest location was Main Ridge (Mornington Peninsula), receiving 169.1 mm during the month
  • Eltham, Kinglake West and Essendon Airport had their highest total May rainfall since at least 1995

Mild days and nights

  • Both daytime and night-time temperatures were warmer than average across Greater Melbourne, with some sites reporting temperatures 1.0 °C or more above the May average
  • The month started with mild daytime and night-time temperatures, due to the warm northerly flow preceding the approaching cold front
  • In Greater Melbourne, the warmest daytime temperature recorded for the month was 23.6 °C at Cranbourne Botanic Gardens on the 1st, and the warmest night-time temperature of 17.1 °C was at Olympic Park on the morning of the 2nd
  • May finished with cool daytime and night-time temperatures, as a pool of cold air followed the passage of cold fronts
  • The lowest daytime temperature in Greater Melbourne was 5.6 °C, recorded at Ferny Creek on the 29th

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 53.4 mm
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 17.8 °C. The warmest day was 22.8 °C on the 1st, and the coolest day was on the 29th when the temperature reached 10.6 °C; this was the coldest May day since 2000
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 10.6 °C. The coldest morning was 6.2 °C on the 18th, and the warmest morning was on the 2nd when the minimum temperature was 17.1 °C

Further information

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Extremes in May 2019
Hottest day 23.6 °C at Cranbourne Botanic Gardens on the 1st
Warmest days on average 17.9 °C at Laverton RAAF
Coolest days on average 13.1 °C at Wallan (Kilmore Gap)
Coldest day 5.6 °C at Ferny Creek on the 29th
Coldest night 0.3 °C at Coldstream on the 18th
Coolest nights on average 6.8 °C at Coldstream
Warmest nights on average 10.6 °C at Melbourne (Olympic Park)
Warmest night 17.1 °C at Melbourne (Olympic Park) on the 2nd
Warmest on average overall 14.2 °C at Melbourne (Olympic Park)
Coolest on average overall 10.2 °C at Wallan (Kilmore Gap)
Wettest overall 169.1 mm at Main Ridge
Wettest day 28.2 mm at Woodend on the 2nd
Strongest wind gust 111 km/h at South Channel Island on the 7th

Highest May total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
May
Eltham 89.0 109.2 in 1987* 65.6
Kinglake West (Wallaby Creek) 141.0 158.0 in 1995* 109.5
Essendon Airport 77.2 119.5 in 1981* 48.7

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported




Summary statistics for May 2019
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
May
2019
Diff
from
average
Highest for
May
2019
Mean for
May
2019
Diff
from
average
Lowest for
May
2019
Total for
May
2019
Average
for
May
Rank of
May
2019
Fraction of
May
average
Cerberus 17.3 +0.7 23.2 1st 8.7 +0.2 1.8 18th 83.2 70.1 average 119%
Coldstream 17.2 +0.6 21.9 1st 6.8 +1.2 0.3 18th 96.6 67.6 high 143%
Cranbourne Botanic Gardens 17.5 +1.0 23.6 1st 8.7 +0.2 5.0 30th 100.3 67.2 high 149%
Essendon Airport 17.8 +1.5 22.2 1st 9.7 +1.8 4.1 18th 77.2 48.7 high 159%
Ferny Creek 13.2   17.6 1st 7.9   2.1 30th 166.4
Laverton RAAF 17.9 +1.0 23.4 1st 9.1 +1.3 3.2 18th 55.6 45.9 average 121%
Melbourne (Olympic Park) 17.8   22.8 1st 10.6   6.2 18th 53.4
Melbourne Airport 17.5 +0.8 22.0 18th 8.9 +0.6 4.6 30th 59.4 39.8 high 149%
Moorabbin Airport 17.8 +0.8 23.0 1st 9.9 +1.2 3.8 17th 80.4 69.0 average 117%
Scoresby Research Institute 17.3 +1.0 21.9 22nd 9.2 +0.9 3.5 18th 92.6 87.1 average 106%
Viewbank 17.8 +0.6 22.5 22nd 8.9 +0.9 3.2 17th 71.0 52.5 high 135%
Wallan (Kilmore Gap) 13.1 +0.2 17.5 18th 7.2 +0.3 2.3 30th 86.8 58.4 high 149%

Daily maximum temperatures for May 2019
12345678910111213141516171819202122232425262728293031
Cerberus23.219.919.716.617.016.818.815.417.114.415.116.817.819.314.815.618.119.421.918.519.319.921.719.218.914.613.914.111.613.814.2
Coldstream21.921.420.515.615.816.717.617.015.914.713.016.517.519.816.517.219.120.920.519.418.819.820.018.820.414.313.013.010.811.714.2
Cranbourne Botanic Gardens23.620.219.516.916.816.815.416.316.614.615.416.617.818.815.215.718.320.521.619.318.720.422.519.114.613.714.29.8
Essendon Airport22.219.720.716.117.016.319.217.116.913.616.617.818.520.417.117.319.622.021.819.120.122.020.919.319.114.513.815.210.813.313.7
Ferny Creek17.617.115.511.012.212.513.412.511.49.910.111.812.715.812.213.915.717.216.815.015.417.417.216.015.49.79.99.45.69.29.2
Laverton RAAF23.421.021.116.417.117.119.817.316.313.415.918.019.120.016.816.818.818.822.019.120.221.922.821.719.715.213.915.510.113.313.5
Melbourne (Olympic Park)22.820.220.716.416.316.718.717.416.214.216.417.718.120.215.816.118.621.521.819.620.422.321.320.219.815.114.015.710.613.314.3
Melbourne Airport22.020.320.715.717.317.019.216.816.113.515.317.218.219.916.117.019.322.020.717.920.421.821.018.819.014.813.115.410.112.513.1
Moorabbin Airport23.020.919.815.816.917.518.716.817.914.616.117.118.619.816.415.717.719.422.319.420.021.222.220.120.115.514.715.110.712.914.6
Scoresby Research Institute21.721.319.615.316.216.317.816.515.613.315.016.117.319.716.317.519.521.120.519.618.821.921.120.119.913.813.813.510.212.114.2
Viewbank22.119.920.715.716.316.518.016.716.213.916.417.217.520.716.817.520.422.222.020.520.222.521.620.820.414.613.313.911.012.113.8
Wallan (Kilmore Gap)16.514.216.112.312.012.814.812.811.89.811.412.712.816.813.214.314.917.517.013.114.316.715.413.815.010.19.49.67.48.89.0
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 May 2019
12345678910111213141516171819202122232425262728293031
Cerberus9.315.69.811.912.18.46.010.77.010.89.811.410.610.89.310.92.01.83.86.48.69.64.612.46.99.97.17.47.46.710.2
Coldstream11.116.27.310.310.05.61.78.83.910.08.09.112.44.97.03.00.50.31.95.64.23.93.79.413.86.15.86.68.14.56.7
Cranbourne Botanic Gardens9.710.110.09.49.47.09.68.410.08.411.011.310.910.69.15.65.26.98.89.47.87.912.58.16.96.97.05.08.4
Essendon Airport15.816.110.611.910.09.56.89.48.59.39.011.111.610.310.79.74.34.17.113.811.011.511.514.713.17.16.27.47.54.46.9
Ferny Creek13.712.99.58.87.68.35.76.46.57.66.16.88.98.68.85.87.39.211.112.58.79.610.513.510.24.32.93.04.02.14.8
Laverton RAAF15.715.79.611.810.18.35.69.97.89.78.411.611.310.69.89.63.73.26.19.510.09.09.314.610.47.26.17.17.24.47.5
Melbourne (Olympic Park)15.617.111.813.011.311.77.410.39.710.210.212.212.711.312.010.56.56.28.912.011.110.79.913.813.79.57.88.28.76.78.5
Melbourne Airport14.515.69.410.99.98.06.08.97.78.78.39.610.58.99.56.15.24.95.812.59.910.311.014.211.36.76.06.96.74.67.1
Moorabbin Airport12.016.211.112.710.29.87.310.39.411.210.411.312.911.410.810.03.84.25.29.911.710.89.014.913.09.27.47.67.75.19.4
Scoresby Research Institute16.216.010.011.79.38.35.29.28.410.38.910.212.210.29.17.14.33.55.412.89.310.210.713.912.18.06.26.88.05.27.6
Viewbank10.716.012.012.09.79.34.99.08.09.99.110.511.810.810.88.33.23.66.310.29.76.97.010.113.29.16.47.58.05.56.7
Wallan (Kilmore Gap)12.212.49.88.47.58.05.76.16.16.25.47.79.06.78.05.76.58.910.39.88.37.98.010.08.94.62.72.63.32.34.2
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 May 2019
12345678910111213141516171819202122232425262728293031
Bonbeach (Carrum) - 11.5 - - - - - 15.4 2.8 2.8 - - - - - - - - - - 7.0 - - - 21.0 2.5 2.0 14.0 7.3
Bullengarook East 6.0 27.2 - 1.0 - 1.2 - 7.6 - 17.6 22.4 - 0.2 - - 0.2 0.2 - - 2.2 1.6 - - - 0.8 3.8 12.2 1.2 2.2 0.4 2.0
Burnside - 8.0 - 1.0 - - - 4.2 - 12.2 4.4 - - - - - - - - - - - - - 0.4 7.4 6.4 0.6 1.0 11.0 0.4
Cape Schanck - 15.6 2.4 2.4 1.6 - - 10.0 1.4 18.8 2.0 3.4 - - - - - 2.2 10.0 - - 1.4 1.6 10.0 4.8 3.4 5.0 10.2 7.2
Cerberus - 13.8 1.2 2.2 3.2 - - 5.0 1.4 3.6 4.0 - 0.2 - - - - - 0.2 1.8 4.0 - - 0.2 1.6 4.0 13.0 6.6 3.4 8.4 5.4
Cheltenham Kingston Centre - 6.6 - 1.0 1.2 - - 3.6 - 5.4 1.6 1.0 - - - - - - - - 0.2 - - - 0.4 2.4 7.0 - 2.4 10.5 4.4
Coldstream - 6.4 4.4 3.0 1.0 0.2 - 6.6 1.2 2.4 6.6 0.4 - - - - - 0.2 - 0.2 0.6 - - - 1.2 11.0 13.6 1.8 4.4 17.0 14.4
Cranbourne Botanic Gardens 7.6 - 5.1 2.6 0.2 - 12.9 5.7 3.2 4.2 0.3 - - - - - - - 1.2 1.3 - - 2.2 7.4 13.2 7.6 1.6 13.8 10.2
Essendon Airport - 4.4 0.6 - 1.0 - - 4.4 0.2 12.0 16.2 - - - - - - - - - - - - - 0.8 12.4 9.4 - 2.2 12.6 1.0
Ferny Creek - 11.6 9.4 7.6 9.4 0.2 0.2 12.8 - 3.2 22.0 1.4 0.4 - - - - - - 0.4 0.8 - 0.2 - 4.6 22.4 9.0 1.6 3.4 20.0 25.8
Greenvale Reservoir
4.6 6.2 - 0.6 0.8 - 3.0 - 13.0 5.2 0.2 5.8 - - - - - -
- - - - -
7.0 0.2 2.0 9.2 10.2
Kinglake West 0.8 13.8 6.8 0.4 13.2 0.4 - 11.0 2.4 9.8 26.0 1.6 0.4 - - - - - - 0.8 2.8 - 0.4 - 2.0 7.2 14.0 2.6 3.0 16.4 13.2
Kinglake West (Wallaby Creek) - 15.0 5.4 - 14.6 0.6 - 10.6 1.0 10.8 25.2 1.0 - 0.2 - - 0.2 - -
2.8 - 0.2 - 1.8 10.4 16.0 1.2 3.8 9.8 10.4
Lancefield 4.8 13.6 2.4 - - - - - - - - - - - - - - - - 2.4 2.2 - - - 3.0 8.2 13.4 0.8 6.8 0.4
Laverton RAAF - 7.2 1.2 - 0.4 - - 6.4 0.2 9.8 5.4 - - - - - - - - 0.2 0.6 - - - 0.6 4.6 6.8 0.2 1.4 10.0 0.6
Main Ridge 19.0 18.0 - 10.0 - - - 18.4 - 18.6 5.2 - - - - - - - - 8.8 1.2 - - 2.4 8.2 - 13.2 13.1 9.4 10.8 12.8
Melbourne (Olympic Park) - 3.6 0.2 0.2 2.0 0.2 - 5.2 0.6 7.2 8.2 - - - - - - - 0.2 0.4 0.4 - - - 1.6 6.6 8.2 0.2 1.2 5.8 1.4
Melbourne Airport - 5.2 0.8 0.2 0.2 - - 3.2 - 12.2 11.8 - - 0.2 - - - - - - - - - - - 9.6 6.0 0.4 1.0 8.4 0.2
Mitcham - 11.4 0.8 0.8 2.6 - 0.2 5.4 0.2 4.4 8.2 - - - - - - - -
0.6 - 0.2 - 2.8 15.8 8.6 1.8 3.0 18.2 5.4
Moorabbin Airport - 16.8 0.4 0.6 1.6 - - 11.4 - 3.8 2.6 - - - - - - - - 0.6 2.0 - - - 1.6 6.8 10.0 1.0 0.8 16.6 3.8
Newham (Cobaw) 8.4 21.0 4.0 - - - - 7.0 - 17.0 9.6 - - - - - - - - 2.0 2.2 - - - 3.0 6.0 13.8 1.6 8.0 - 0.6
Oakleigh (Metropolitan Golf Club) - 14.6 - 4.0 - 7.6 - 5.4 3.0 - - - - - - 1.8 - - - - - 8.0 11.8 - - 16.6
Preston Reservoir - 8.0 - 0.2 1.8 0.2 - 3.6 1.6 9.0 3.8 - - - - - - - -
- - - - 0.6 15.8 8.0 0.6 1.8 9.6 2.4
Romsey 3.8 10.0 2.8 - - - - 3.8 - 28.6 - - - - - - - - 1.4 1.2 0.2 - 0.2 2.0 5.0 9.4 1.2 5.6 0.8 0.4
Rosebud (Country Club) - 23.6 1.8 2.0 - - - 17.4 25.6 3.0 1.2 - - - - 1.8 7.4 - - 1.2 5.4 - 8.6 3.8 1.4 10.2 13.4
Scoresby Research Institute - 11.2 1.6 1.4 4.6 - - 7.4 0.4 2.6 11.6 - - - - - - - - 0.2 0.2 - 0.2 - 3.2 14.2 7.8 1.4 2.6 14.8 7.2
Springvale (Sandown) - 11.4 - 1.8 - - 1.0 8.0 - 5.8 0.2 - - - - - - - - 2.2 - - - 3.0 - 8.0 10.6 1.8 0.2 17.8
Springvale Necropolis - - 10.0 - - - - 9.0 - 4.0 - - - - - - - 1.5 - - - - 19.0 20.0 5.0 - 6.0
Toorourrong Reservoir (Toorourrong) - 9.8 6.4 - 6.2 0.2 0.2 4.8 0.4 7.8 15.4 0.2 - - - - 0.2 - -
2.0 - 0.2 - 0.6 5.8 10.6 0.4 0.6 5.0 3.0
Upper Plenty - 13.8 7.4 - 5.4 0.4 - 6.2 - 11.4 19.0 0.8 - - - - - - - 0.6 2.6 - - - 0.8 6.4 15.8 0.2 1.6 4.6 3.2
Viewbank - 6.4 - 1.0 5.2 0.4 0.4 4.0 0.8 9.4 5.6 - - - - - - - - 0.4 - - - - 1.0 12.6 8.8 0.6 1.0 11.6 1.8
Wallan - 16.6 2.0 - 3.2 0.4 - 4.2 - 16.2 19.2 0.4 - - - - - - - - 2.0 - - - 1.0 4.8 - 0.6 1.6 4.2 2.0
Wallan (Kilmore Gap) 0.2 19.4 2.2 - 3.0 0.2 - 4.2 0.4 14.6 19.0 0.4 0.2 - - - - - - 0.4 2.2 0.4 0.2 - 0.8 4.6 8.2 0.2 1.6 2.8 1.6
Warburton (O'Shannassy Reservoir (Quarte - - - - - 1.4 - 6.8 1.2 3.4 14.6
- - - - - - -
- 1.2 - - 1.6 22.8 10.6
- - -
Willowmavin (Avalon Station) 1.8 21.4 2.2 - - - - 4.8 - 12.8 15.2 - - - - - 0.4 - 0.2 1.4 4.2 0.2 0.4 - 3.8 7.8 12.2 0.6 10.6 0.2 0.4
Woodend 7.6 28.2 1.6 0.8 0.4 0.4 0.2 7.4 0.6 14.8 20.8 0.4 0.2 - - - 0.2 - - 2.4 2.8 0.2 0.2 0.2 2.4 3.0 9.2 2.6 6.8 0.4 1.0
Yan Yean 0.2 8.8 12.6 - 7.2 - 0.2 3.2 0.2 9.0 10.4 - 8.2 - - - - - -
1.0 1.0 0.2 0.2 0.2 4.0 14.6 0.2 1.4 9.2 3.6
Yarra River @ Warrandyte
9.4 2.8 0.4 3.4

3.4
4.4 24.0











- 0.8 10.8 9.4 1.2 2.2 18.2 3.6
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 11 am on Monday 3 June 2019. 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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