Greater Melbourne in September 2019: drier than average in the city's north and west, some warm days

Rainfall totals for September were below average in some northern and western areas of Greater Melbourne, but totals were generally close to average in the east. Daytime temperatures for September tended to be warmer than average despite several cool days, and night-time temperatures were generally close to average for the month despite one of Melbourne's warmest September nights on record on the 21st.

Below average rainfall in the north and west

  • Rainfall totals for September were generally close to average in the east, but it was a drier than average month in some northern and western suburbs
  • Much of the rainfall for September was recorded during the first 16 days of the month, with fewer rain days later in the month
  • The wettest day was on the 16th, with many sites across Greater Melbourne recording daily totals over 20 mm
  • Rainfall totals ranged from around 41% of average at Wallan (Kilmore Gap) to 143% of average at Coldstream

Some warm days and nights

  • Mean maximum temperatures for September were warmer than average throughout Greater Melbourne
  • There were several warmer than average days spread throughout the month
  • On the 20th, many sites recorded temperatures over 25 °C, making it the warmest day around Greater Melbourne since April
  • Cold southerly winds saw several days with maximum temperatures below 15 °C across the city, with the coldest day being 7.8 °C at Ferny Creek on the 7th
  • Mean maximum temperatures ranged from 0.1 °C above average at Viewbank to 0.8 °C above average at Essendon Airport, Melbourne Airport and Scoresby
  • Night-time temperatures for September were generally within one degree of average at sites around Greater Melbourne
  • Overnight from 6pm on the 20th to 9am on the 21st, temperatures at Melbourne (Olympic Park) didn't drop below 20.3 °C, the warmest such overnight temperature in Melbourne city since 20.7 °C on 24 September 2001 at the old Melbourne Regional Office site
  • On the 21st, several sites had their warmest September night on record
  • The coldest night was -0.5 °C at Coldstream on the 18th, when minimum temperatures across Greater Melbourne were more than 4 °C below average
  • Mean minimum temperatures ranged from 0.3 °C below average at Melbourne Airport to 1.1 °C above average at Essendon Airport

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 41.0 mm
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 17.8 °C. The warmest day was 26.2 °C on the 20th, and the coolest day was on the 9th when the temperature reached 12.8 °C
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 9.1 °C. The coldest morning was 3.6 °C on the 17th, and the warmest morning was on the 20th when the minimum temperature was 15.7 °C

Further information

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Extremes in September 2019
Hottest day 26.3 °C at Moorabbin Airport on the 20th
Warmest days on average 17.8 °C at Melbourne (Olympic Park) and Viewbank
Coolest days on average 13.5 °C at Wallan (Kilmore Gap)
Coldest day 7.8 °C at Ferny Creek on the 7th
Coldest night -0.5 °C at Coldstream on the 18th
Coolest nights on average 5.3 °C at Coldstream
Warmest nights on average 9.1 °C at Melbourne (Olympic Park)
Warmest night 20.3 °C at Scoresby Research Institute on the 21st
Warmest on average overall 13.4 °C at Melbourne (Olympic Park)
Coolest on average overall 9.5 °C at Wallan (Kilmore Gap)
Wettest overall 151.6 mm at Warburton (O'Shannassy Reservoir (Quarte
Driest overall 27.8 mm at Laverton RAAF
Wettest day 31.2 mm at Ferny Creek on the 16th
Strongest wind gust 100 km/h at Melbourne Airport on the 20th

Record highest September daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Scoresby Research Institute 20.3 on the 21st 20.2 on the 30th in 1980 54 7.6
Essendon Airport 18.3 on the 21st 18.2 on the 30th in 1944 50 6.8
Coldstream 19.8 on the 21st 19.3 on the 24th in 2001 25 5.5
Viewbank 20.2 on the 21st 19.0 on the 24th in 2001 20 7.7



Summary statistics for September 2019
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2019
Diff
from
average
Highest for
September
2019
Mean for
September
2019
Diff
from
average
Lowest for
September
2019
Total for
September
2019
Average
for
September
Rank of
September
2019
Fraction of
September
average
Coldstream 17.4 +0.2 25.3 20th 5.3 -0.2 -0.5 18th 99.2 69.5 high 143%
Cranbourne Botanic Gardens 17.0 +0.4 25.3 20th     5.8 9th 77.1 83.2 average 93%
Essendon Airport 17.6 +0.8 24.9 20th 7.9 +1.1 2.3 18th 43.8 50.8 average 86%
Ferny Creek 13.7   21.4 20th 6.2   2.3 17th 104.6
Laverton RAAF 17.7 +0.7 25.3 20th 7.2 +0.5 2.2 18th 27.8 48.3 low 58%
Melbourne (Olympic Park) 17.8   26.2 20th 9.1   3.6 17th 41.0
Melbourne Airport 17.5 +0.8 24.7 20th 6.8 -0.3 1.1 17th 39.0 46.4 average 84%
Moorabbin Airport 17.3 +0.4 26.3 20th 8.6 +0.6 1.5 17th 66.8 64.0 average 104%
Scoresby Research Institute 17.3 +0.8 25.1 20th 7.6 0.0 2.9 18th 93.8 82.6 average 114%
Viewbank 17.8 +0.1 26.0 20th 7.6 -0.1 1.0 17th 67.0 54.7 average 122%
Wallan (Kilmore Gap) 13.5 +0.3 20.6 20th 5.5 -0.1 0.3 17th 24.2* 59.3 v low 41%

* note: there is a missing day of rainfall observations at this site on the 10th, when 1.4 mm was recorded at the nearby Wallan site


Daily maximum temperatures for September 2019
123456789101112131415161718192021222324252627282930
Cerberus19.616.719.017.717.915.611.913.612.913.920.418.214.717.119.812.913.219.813.314.914.6
Coldstream19.817.122.118.420.415.812.114.212.515.118.819.616.719.217.912.914.818.922.925.321.314.415.115.619.220.314.615.614.7
Cranbourne Botanic Gardens19.917.421.118.818.515.612.714.312.921.215.617.519.212.513.418.925.318.215.115.215.416.519.518.513.016.2
Essendon Airport19.117.122.020.020.315.813.116.012.714.619.720.618.420.119.412.613.719.322.624.919.615.615.215.116.619.918.914.916.314.6
Ferny Creek16.714.418.915.716.411.77.89.18.411.716.715.212.815.314.99.210.615.619.121.417.810.511.511.812.215.616.110.511.712.0
Laverton RAAF20.318.319.019.420.015.213.315.013.314.822.121.017.919.320.613.213.018.523.325.319.615.915.915.216.020.418.915.116.014.7
Melbourne (Olympic Park)19.617.619.618.721.216.012.915.112.814.820.820.818.620.021.812.814.818.924.026.219.415.515.215.116.620.318.814.915.814.1
Melbourne Airport18.817.521.619.619.415.613.115.412.714.520.220.017.619.919.512.413.219.423.024.718.915.415.914.916.520.519.414.615.314.7
Moorabbin Airport19.817.519.717.920.215.712.615.114.220.919.017.217.619.313.214.417.723.626.318.915.513.814.816.118.619.013.615.013.9
Scoresby Research Institute19.917.122.018.320.314.612.314.012.714.920.219.417.419.219.312.814.122.925.121.614.514.914.816.119.319.613.715.513.9
Viewbank20.117.022.620.021.115.912.715.212.714.919.820.418.719.719.612.814.419.523.426.020.515.114.816.019.619.414.816.214.2
Wallan (Kilmore Gap)14.412.517.215.914.210.98.811.811.014.817.014.615.714.98.610.014.517.920.614.511.011.410.712.515.316.110.611.611.1
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 September 2019
123456789101112131415161718192021222324252627282930
Cerberus8.99.15.94.05.710.58.17.86.77.23.511.17.28.710.08.84.38.98.59.09.4
Coldstream3.48.95.84.25.49.06.86.05.65.80.57.02.23.18.78.2-0.3-0.52.712.419.83.36.32.33.92.14.12.73.96.8
Cranbourne Botanic Gardens11.59.38.36.16.29.87.56.45.86.411.77.310.06.66.76.410.36.57.77.4
Essendon Airport10.17.610.86.46.810.07.56.65.45.84.511.77.97.711.98.43.42.35.016.818.35.28.06.06.56.611.84.87.07.0
Ferny Creek9.77.17.27.46.27.54.03.62.53.93.89.03.15.08.15.72.33.69.214.517.33.84.64.25.35.58.34.14.65.1
Laverton RAAF11.55.46.95.77.09.97.93.85.95.33.711.27.24.912.48.87.02.25.316.513.64.07.84.24.94.110.44.17.16.6
Melbourne (Olympic Park)11.110.29.28.28.711.38.88.26.87.75.011.17.79.312.49.73.64.38.215.714.57.98.98.38.78.312.37.29.110.1
Melbourne Airport8.76.710.15.37.49.67.14.44.94.93.710.54.56.611.47.91.12.95.216.116.04.17.34.14.64.810.14.55.05.5
Moorabbin Airport10.99.87.67.56.910.68.17.97.48.24.211.28.68.911.49.71.53.36.117.713.97.18.57.97.76.311.47.79.310.5
Scoresby Research Institute10.59.56.16.16.410.37.56.25.47.03.410.24.94.911.38.92.96.916.620.35.17.15.04.83.911.55.26.27.6
Viewbank8.99.78.08.06.69.37.96.75.76.62.88.86.66.510.98.71.01.66.216.620.25.07.95.27.05.98.75.46.29.0
Wallan (Kilmore Gap)5.86.27.26.66.76.34.64.02.23.35.06.03.45.97.65.50.33.36.711.514.43.24.34.15.15.47.23.73.94.7
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 September 2019
123456789101112131415161718192021222324252627282930
Bonbeach (Carrum) - 3.5 - - 3.0 3.0 17.0 3.0 - - - 24.0 - - - - 5.0
Bullengarook East - 6.6 0.4 - - 1.6 1.0 4.2 6.0 0.2 - - - 0.8 1.4 8.6 1.2 - - - - 1.4 1.6 0.8 - - -


Bundoora (Latrobe University) 6.6 5.2 16.4 2.0 18.6 7.2 1.6





Burnside - 3.4 0.8 - 1.2 0.2 1.8 0.3 6.0 - - - - - -
- - - - - - 1.2 4.8 - - - - - -
Cape Schanck - 3.0 - - 2.8 - 12.4 6.4 11.0 1.4 - - - - 2.0 18.6 - - - - - 5.0 0.6 1.8 - - - 4.8 1.0
Cerberus 0.2 2.8 1.8 - 0.4 1.2 12.0 7.4 18.2 0.4 - 0.2 - - 0.4 19.4 -









4.8 - 0.2
Cheltenham Kingston Centre - 3.2 0.4 - 3.2 1.0 6.4 2.0 8.0 - 2.0 - - - 0.4 11.0 - - - - - 2.6 - 1.6 - - - 2.8 0.1 -
Coldstream - 6.4 1.0 0.2 - 6.8 11.0 1.6 28.0 2.0 - - - - 3.4 27.4 - - 0.2 - - 8.0 1.4 0.6 - - - 1.2 - -
Cranbourne Botanic Gardens - 6.2 0.6 - 1.0 11.0 3.8 13.0 0.4 - - - - 3.8 23.4 - - - - - 4.5 1.0 1.0 - - - 4.0 - 0.2
Essendon Airport - 3.8 1.4 - 0.8 3.0 3.4 0.6 4.2 1.2 - - 0.2 - 1.0 14.0 - - - - - 5.8 2.0 2.2 - - - - 0.2 -
Ferny Creek - 12.2 1.0 0.2 5.0 7.4 11.2 3.8 20.2 3.4 - 0.2 0.8 - 3.0 31.2 - -
- -
3.0 1.8
0.2 -
-
Greenvale Reservoir - 6.6
-
3.0 0.2 2.2 8.6 0.6 1.0 - - - 2.6 17.2 -
0.2

4.6 5.0 3.6 0.2 - - - - -
Kinglake West 0.6 - - - - 10.0 5.6 10.2 11.6 6.0 - - 0.4 - 5.6 9.0 1.0 - - - - 7.6 2.0 3.6 - - - 2.2

Kinglake West (Wallaby Creek) 0.2 9.2
-
8.4 4.6 6.8 10.0 7.8 0.4 0.2 2.0 - 4.8 8.4 0.2
0.2

8.6 1.4 4.2 - - - 1.6 - -
Koo Wee Rup - 5.6 - - 1.4 4.6 10.4
16.4 1.2 - - - - - 23.2 - - - - - 6.2 0.8






Lancefield - 5.8 - - - 4.8 3.2 2.4 6.2 0.4 - - - - 1.8 1.4 - - - - 6.6 - 0.4 - - - - 0.8
Laverton RAAF - 2.6 1.4 - 2.6 0.4 1.2 0.4 5.4 0.4
- - - 0.6 9.6 - - - - - 0.6 0.6 1.8 - - - - 0.2 -
Main Ridge - 9.0 - - - 30.0 - 6.8 - - - 2.0 16.0 - - - - - 7.4 - - - - - 9.6

Melbourne (Olympic Park) - 2.4 0.6 - 3.4 2.0 1.0 0.6 5.6 2.6 - - - - 1.6 13.0 - - - - - 4.6 2.0 1.4 - - - 0.2 - -
Melbourne Airport - 3.0 1.4 0.2 0.2 1.4 2.2 1.0 9.4 0.2 - 0.2 - - 1.0 12.0 - - - - - 3.0 1.0 2.6 - - - 0.2 - -
Melbourne Botanical Gardens - 2.4 1.0 - 3.2 3.0 2.2 4.0 5.8 2.2 - - - 0.2 2.0 16.8 - - - - 0.2 4.4 2.8 1.2





Mitcham - 8.4
-
8.2 8.2 2.6 16.4 3.8 - 0.2 - 0.2 2.0 21.0 -
-

9.6 3.0 0.2 - - - 3.0 - -
Moorabbin Airport - 5.6 0.8 - 3.8 1.8 7.4 1.8 10.0 2.6 - 0.2 - - 1.4 20.8 - - - - - 3.0 2.2 1.4 0.2 0.4 - 3.4 - -
Mount Waverley (Riversdale Golf Club) - 7.2 1.5 - 2.5 7.0 6.0 1.7 11.0 3.0 0.7 - - - 2.0 18.0













Newham (Cobaw) 6.2 1.6 - - 2.6 2.6 2.2 7.0 - - - - - 2.0 1.6 - - - - - 4.4 2.2 - 1.0




Oakleigh (Metropolitan Golf Club) 6.4 1.6 - 3.4 3.4 6.2 11.0 4.6 - - - - 20.2 - - - - 1.0 3.0 2.8 2.0 - - - 2.0
Preston Reservoir - 5.8
-
7.6 7.4 1.8 6.4 2.8 - - - - 1.8 17.4 -
-

5.4 2.2 2.0 0.2 - - 0.6 - -
Romsey 5.2 1.0 - 0.2 0.2 2.8 2.4 - 7.4 - 0.2


















Rosebud (Country Club) - 9.0 2.4 - 1.4 - 11.4 8.2 9.2 0.6 - - - - - 15.6 - - - - - - - - - - - 5.2 0.6
Scoresby Research Institute - 10.2 1.0 0.2 2.4 7.4 10.8 1.4 18.8 2.8 0.2 - - - 1.2 21.2 - - - - - 8.0 2.4 1.4 - - - 4.4 - -
Springvale (Sandown) 3.4 0.6 0.8 2.8 0.2 8.8 1.4 5.6 10.6 0.8 - - - - 14.8 7.0 - - - - 3.4 2.0







Springvale Necropolis

- - - - 27.0 3.0 - - - 23.0 - - - - 6.5 2.0 - - - 6.0
Toorourrong Reservoir (Toorourrong) - 3.8
-
3.2 2.8 4.8 6.0 3.8 0.2 - 0.6 - 4.0 9.4 0.2
-

6.6 0.6 3.4 - 0.2 - 0.2 - -
Upper Plenty - 4.6 1.2 - - 3.0 2.2 5.2 3.6 1.4 - - 1.2 - 3.2 2.8 - - - - - 5.6 1.2 2.8





Viewbank - 6.8 1.4 - 0.6 5.0 7.8 1.4 11.4 1.0 0.2 - 0.8 - 2.2 18.4 0.2 0.2 - - - 5.8 2.0 0.8 - - 0.2 0.8 - -
Wallan 3.6 - - - 5.4 2.2 3.6 4.2 1.4 - - - - 3.2 4.0 - - - - 4.0 1.4 1.2





Wallan (Kilmore Gap) - 2.6 1.0 - 0.2 1.8 2.6 2.4 2.6
- - 0.8 - 1.6 2.8 - - - - - 3.2 1.0 1.4 - - 0.2 - - -
Warburton (O'Shannassy Reservoir (Quarte 0.2 11.6
-
16.6 20.0 6.2 23.8 7.2 - 0.6 4.2 - 4.0 26.4 2.8
-

17.8 3.6 3.4 - - - 3.2 - -
Willowmavin (Avalon Station) - 4.6 0.6 0.4 - 3.2 1.6 1.2 6.2 0.2 0.2 - - - 1.8 2.8 0.6 - - - - 2.6 1.6 1.4 - 0.2 0.2 - - -
Woodend - 10.3 1.6 0.2 0.2 1.9 1.0 2.8 6.4 - - - - - 2.1 3.5 2.0 - - 0.2 - 2.6 2.0 1.0 - - - 0.3 - 0.2
Yan Yean - 5.0
-
2.8 2.2 3.2 19.0 4.4 2.8 - 0.2 - 4.0 15.4 -
-

6.8 0.6 5.8 - - - 0.2 - -
Yarra River @ Warrandyte
6.0 1.8
- 5.0 9.8 3.0 14.8 2.8




20.0




5.2 1.6 0.6 -

2.2

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 10 am on Tuesday 1 October 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
Enquiries