Greater Melbourne in October 2018: rainfall below average, warm days and nights

Rainfall in October 2018 was below average across Greater Melbourne. Both daytime and night time temperatures were warmer than average.

Below average rainfall

  • October rainfall was below average across Greater Melbourne, with rainfall totals ranging between 39% of average at Essendon Airport and 87% of average at Wallan (Kilmore Gap)
  • There were two wet periods during the month, one on the 9th and 10th, and the other between the 16th and 21st
  • The highest daily total, 28.8 mm, was recorded at Kinglake West (in the north of Greater Melbourne) on the 17th and resulted from a complex low-pressure system that crossed Greater Melbourne bringing tropical moisture from the north
  • During this event, many sites across Greater Melbourne had daily rainfall totals between 10 mm and 20 mm
  • Woodend (in the north of Greater Melbourne) was the wettest location in October, receiving 69.0 mm during the month

Warm days and mild nights

  • Daytime temperatures were warmer than average across Greater Melbourne, with most sites reporting temperatures between 1.5 and 2.0 °C above the October average
  • In Greater Melbourne, the warmest daytime temperature for the month, 28.9 °C, was recorded at Essendon Airport on the 8th
  • Night time temperatures were also warmer than average at all sites except Coldstream
  • The warmest night time temperature was 20.0 °C, recorded at Melbourne (Olympic Park) on the 16th, in a warm and humid northerly air-flow
  • Previous night at the same site was also warm, with minimum temperature of 19.5 °C; this was the first time that the Melbourne city had two consecutive nights in October with minimum temperatures above 19 °C
  • Coldstream had its warmest October night (highest daily minimum temperature) on record on the 16th

Melbourne (Olympic Park)

  • Melbourne (Olympic Park) site suffered equipment outages on the 9th and 10th and total daily rainfall on these two days is not known; based on the surrounding sites, it is estimated that 3 to 5 mm fell on these two days, in addition to the 18 mm recorded on the remaining 29 days
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 21.4 °C. The warmest day was 28.2 °C on the 8th, and the coolest day was on the 4th when the temperature reached 14.6 °C
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 11.2 °C. The coldest morning was 4.7 °C on the 1st, and the warmest morning was on the 16th when the minimum temperature was 20.0 °C

Further information

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Extremes in October 2018
Hottest day 28.9 °C at Essendon Airport on the 8th
Warmest days on average 22.2 °C at Viewbank
Coolest days on average 17.6 °C at Ferny Creek
Coldest day 10.9 °C at Ferny Creek on the 10th
Coldest night -0.5 °C at Coldstream on the 11th
Coolest nights on average 6.5 °C at Coldstream
Warmest nights on average 11.2 °C at Melbourne (Olympic Park)
Warmest night 20.0 °C at Melbourne (Olympic Park) on the 16th
Warmest on average overall 16.3 °C at Melbourne (Olympic Park)
Coolest on average overall 13.1 °C at Wallan (Kilmore Gap)
Wettest overall 69.0 mm at Woodend
Wettest day 28.8 mm at Kinglake West on the 17th
Strongest wind gust 80 km/h at Wallan (Kilmore Gap) on the 15th
80 km/h at Wallan (Kilmore Gap) on the 16th

Record highest October daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
October
Coldstream 19.9 on the 16th 18.6 on the 30th in 2010 25 6.7



Summary statistics for October 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
October
2018
Diff
from
average
Highest for
October
2018
Mean for
October
2018
Diff
from
average
Lowest for
October
2018
Total for
October
2018
Average
for
October
Rank of
October
2018
Fraction of
October
average
Cerberus 19.7 +1.1 27.2 15th 9.6 +0.8 1.2 1st 33.0 65.6 low 50%
Coldstream 21.3 +1.6 27.2 30th 6.5 -0.2 -0.5 11th 46.8 65.5 low 71%
Cranbourne Botanic Gardens 21.0 +2.0 27.8 15th 9.0 +0.2 4.3 1st 37.6 74.9 low 50%
Essendon Airport 22.0 +2.6 28.9 8th 9.7 +1.4 2.7 1st 23.0 59.0 low 39%
Ferny Creek 17.6   23.2 30th 8.8   3.6 28th 55.4
Laverton RAAF 21.4 +2.1 28.2 19th 9.8 +1.5 1.7 1st 25.0 54.9 low 46%
Melbourne (Olympic Park) 21.4   28.2 8th 11.2   4.7 1st
Melbourne Airport 21.8 +2.4 27.8 19th 9.0 +0.5 3.0 1st 36.2 52.9 average 68%
Moorabbin Airport 21.3 +2.0 28.5 19th 9.5 +0.2 3.3 1st 36.4 68.3 low 53%
Scoresby Research Institute 21.2 +2.1 28.4 8th 8.9 +0.1 2.1 1st 49.2 82.8 low 59%
Viewbank 22.2 +1.7 28.7 8th 9.0 +0.1 2.0 1st 34.8 60.0 average 58%
Wallan (Kilmore Gap) 18.0 +1.8 24.2 30th 8.1 +1.3 3.0 11th 44.4 50.8 average 87%

Daily maximum temperatures for October 2018
12345678910111213141516171819202122232425262728293031
Bundoora (Latrobe University)25.026.520.215.226.528.517.416.521.027.028.322.523.020.028.026.516.022.519.227.2
Cerberus20.522.617.216.318.119.522.916.118.520.621.126.127.220.421.419.226.416.118.426.917.115.417.017.118.515.416.621.618.4
Coldstream22.022.918.114.920.723.025.126.617.316.120.522.123.925.726.422.522.218.926.215.518.824.618.017.622.119.619.219.121.227.223.4
Cranbourne Botanic Gardens24.915.718.822.824.125.917.115.218.420.224.125.527.821.121.826.715.918.426.819.119.119.216.117.625.419.4
Essendon Airport23.925.818.816.120.124.726.128.917.217.020.223.325.327.727.722.822.821.427.816.218.927.219.517.422.619.420.817.618.926.320.9
Ferny Creek19.120.315.111.416.120.121.423.214.810.916.417.919.822.623.118.118.715.522.411.015.321.314.513.118.515.915.514.116.223.220.4
Laverton RAAF23.727.117.116.418.422.624.626.717.416.019.121.224.827.927.922.922.722.528.216.518.927.820.016.319.418.920.916.317.625.119.8
Melbourne (Olympic Park)23.325.818.114.620.523.824.728.217.916.520.722.724.927.327.523.122.620.727.416.119.227.018.815.519.518.319.615.917.025.219.5
Melbourne Airport23.225.919.116.419.224.225.527.516.416.219.522.624.427.227.323.222.721.327.816.618.827.020.116.622.319.021.217.218.226.921.0
Moorabbin Airport21.426.616.315.220.322.724.527.517.316.519.922.224.628.328.523.023.620.328.515.618.727.317.917.518.318.319.216.719.924.220.9
Scoresby Research Institute23.323.617.314.819.824.428.417.915.720.222.324.826.126.522.122.119.426.915.418.825.719.017.021.319.218.918.219.926.721.7
Viewbank23.325.519.121.124.525.928.717.716.321.223.224.627.622.222.319.927.516.119.426.620.118.323.120.420.719.120.227.522.5
Wallan (Kilmore Gap)18.520.516.811.716.419.521.224.013.413.116.119.119.421.822.817.417.716.322.312.515.121.616.313.820.015.918.014.916.824.220.5
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 October 2018
12345678910111213141516171819202122232425262728293031
Bundoora (Latrobe University)2.315.510.35.35.514.39.33.85.06.519.015.113.710.54.99.08.04.57.05.010.2
Cerberus1.28.914.310.48.65.36.910.613.49.610.011.48.313.112.317.614.813.511.311.37.06.88.19.34.56.57.09.09.43.212.6
Coldstream0.18.313.19.02.62.63.87.112.99.4-0.52.73.16.611.319.912.814.76.211.54.23.36.45.10.63.66.21.25.52.27.0
Cranbourne Botanic Gardens4.38.67.96.96.48.813.78.08.18.86.610.113.317.914.813.110.76.77.29.86.28.35.46.36.29.8
Essendon Airport2.710.815.110.36.76.97.211.414.79.24.65.87.611.118.718.915.113.911.410.86.16.510.75.26.57.59.39.28.85.513.9
Ferny Creek5.010.612.95.85.97.812.913.811.75.64.27.310.512.915.416.312.310.610.68.56.38.79.44.84.36.37.03.64.87.39.1
Laverton RAAF1.79.814.410.710.75.76.211.814.610.37.55.57.811.718.019.214.814.111.210.76.17.310.85.94.45.87.610.310.95.713.4
Melbourne (Olympic Park)4.711.414.710.99.18.310.313.516.110.16.48.710.512.419.520.016.114.712.811.77.68.913.09.26.49.611.39.39.18.313.0
Melbourne Airport3.010.315.210.05.06.06.410.513.58.63.25.46.710.216.218.114.413.610.110.06.47.79.14.74.85.97.18.38.85.912.4
Moorabbin Airport3.39.814.610.18.37.56.510.59.18.05.76.610.315.519.215.311.08.37.711.39.05.29.610.37.36.87.511.8
Scoresby Research Institute2.19.813.98.87.27.86.59.315.38.93.44.87.29.317.919.014.813.412.211.56.86.78.07.14.56.68.83.25.56.110.3
Viewbank2.010.213.410.25.36.07.310.614.89.42.75.86.511.519.715.014.110.511.25.06.110.38.34.97.99.66.67.55.511.7
Wallan (Kilmore Gap)4.710.413.65.45.47.211.613.811.75.13.05.87.712.013.914.212.110.28.97.35.48.19.83.34.75.36.74.04.47.19.5
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 October 2018
12345678910111213141516171819202122232425262728293031
Bonbeach (Carrum) - - - - - - - - 2.0 2.2 - - - - - 2.0 6.6 5.2 3.3 14.5
Bullengarook East - 0.2 - 2.8 - - - - 3.6 23.4 - - - - - 3.2 15.8 1.4 - 7.2 3.6 - - - - - - - - - -
Bundoora (Latrobe University) 1.4 - - - - - - 0.5 8.6 - - - - - 0.7 7.3 6.6 - 10.6 - - 2.0 - - - - - -
Burnside - - - - - - - - - 4.4 - - - - - - 10.6 2.0 - 5.2 7.0 - - - - - - - - - -
Cape Schanck - - 0.4 - - - - - 2.2 6.6 - - - - - 3.8 - 7.8 - - - - 11.0 - - - 0.4 - - - -
Cerberus - 0.2 - - - - - - 3.0 3.8 0.6 - - - - 0.6 14.2 1.0 1.0 4.6 4.0 - - - - - - - - - -
Cheltenham Kingston Centre 1.5 - - - - - - - 1.5 18.8 2.0 - - - - 1.0 3.4 1.0 0.1 8.2 3.4 - - - - - - - - - -
Coldstream - - 0.2 - - - - - - 17.2 - - - - - - 9.8 1.4 0.4 6.2 11.6 - - - - - - - - - -
Cranbourne Botanic Gardens 0.1 - - - - - - - 0.4 3.6 - - - - - 1.4 12.8 5.2 10.4 3.7 - - - - - - - - - -
Essendon Airport - - - - - - - - - 7.4 - - - - - - 4.0 1.8 - 4.6 5.2 - - - - - - - - - -
Ferny Creek - - - 0.6 - 0.2 - - - 8.8 - 0.2 - - - 0.8 19.0 7.8 1.2 7.2 9.4 - 0.2 - - - - - - - -
Greenvale Reservoir -




- - - 7.0
- -

0.4 6.4 1.4
1.2 3.2 0.2








Kinglake West - - - 2.8 - - - - - 10.8 - - - - 2.2 - 28.8 - - 3.6 14.6









Kinglake West (Wallaby Creek) 0.2

1.2
0.2 - - - 18.6 0.2 - -

3.0 21.8 0.2 0.2 0.8 18.8 -








Lancefield - - - - - - - - 22.0 - - - - - 2.4 22.0 1.6 - 2.6 5.4









Laverton RAAF - - - - - - - - - 2.2 - - - - - - 11.8 1.6 - 5.0 4.4 - - - - - - - - - -
Melbourne (Olympic Park) - - - - - - - -

- - - - - 0.2 5.2 2.0 - 5.0 5.6 - - - - - - - - - -
Melbourne Airport - - - - - - - - - 6.6 - 0.2 - - - - 7.6 2.2 0.2 5.4 14.0 - - - - - - - - - -
Mitcham -

0.4

- - - 6.8

-

0.6 12.6 12.2 1.2 3.6 10.0 -








Moorabbin Airport - - - - - - - - 8.2 3.0 - - - - - 2.0 5.4 2.2 0.6 9.2 5.6 0.2 - - - - - - - - -
Newham (Cobaw) - - - - - - - - 0.4 19.4 - - - - - 5.2 - 5.0 - 4.6 3.0









Preston Reservoir -




- - - 8.4
- -

- 0.2 7.0 0.6 4.2 8.0 -








Romsey - - - 1.0 - - - - 0.4 19.2 - - - - - 1.4 16.6 2.0 0.2 8.0









Rosebud (Country Club) 10.2 0.5 - - - - - 2.0 6.4 - - - - - 5.4 7.2 2.8 1.2 5.2 4.8









Scoresby Research Institute - - - 0.4 - - - - - 6.2 0.2 - - - - 2.2 14.8 9.6 - 8.6 7.2 - - - - - - - - - -
Springvale Necropolis - 4.0 - - - - - - - 5.0 - - - - - 2.0 12.2 - - 13.5








Toorourrong Reservoir (Toorourrong) -



0.2 - - - 17.4
- -

1.2 15.4 0.2
0.8 17.2 -








Upper Plenty - - - 2.0 - - - - 0.2 12.8 - - - - - 1.4 17.6 - 0.2 1.2 16.0









Viewbank - - - 0.4 - - - - 1.6 7.4 - - - - - - 9.0 4.8 - 4.4 7.2 - - - - - - - - - -
Wallan - - - 0.6 - - - - 9.2 - - - - - 1.8 12.0 0.4 - - - 13.2








Wallan (Kilmore Gap) - - - 0.4 - - - - 0.8 11.8 - - - - - 1.0 14.4 0.2 0.2 0.8 14.8 - - - - - - - - - -
Warburton (O'Shannassy Reservoir (Quarte -

1.0

- - - 9.4 0.2 - -

- 1.4 2.6
2.4 15.6 -








Willowmavin (Avalon Station) - - - - - - - - - 17.8 - - - - - - 22.8 0.2 - 1.0 7.6 0.2 - - - - - - - - -
Woodend - 0.4 - 2.0 - - - - 0.6 23.0 - 0.2 - - - 3.6 24.1 4.7 0.3 7.2 2.7 0.2 - - - - - - - - -
Yan Yean -

0.4

- - 0.2 6.4
- -

0.4 12.6 0.2
- 6.8 0.2








Yarra River @ Warrandyte - - - - 0.2 - - - - 3.4 0.2 - 0.2 - - 1.2 13.0 2.6 0.4 3.2 7.0 - - - - 0.2 - - - - -
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 Thursday 1 November 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