Melbourne in summer 2015-16: Warm and generally drier than normal

Summer rainfall in Melbourne was generally below average across the city. Both daytime and night time temperatures were up to 2 °C warmer than average.

  • Generally average to below average rainfall
  • Above average summer rainfall at Avalon after 72.0 mm fell on 28 January
  • Both daytime and night time temperatures were warmer than normal

Most sites around Melbourne had a drier than normal summer. Avalon Airport recorded above average summer rainfall, however, more than half (72.0 mm) fell on a single day (to 9am on 28 January). For the rest of summer, rainfall totals at Avalon were below the long-term average.

Daytime temperatures were warmer than average at all sites around Melbourne. All sites recorded average daytime temperatures more than 1 °C above normal, with Scoresby 2.4 °C above average. Minimum temperatures for summer were also warmer than average at all sites across Melbourne. Average summer minimum temperatures ranged from 0.6 °C above average at Cerberus, Coldstream and Cranbourne to 2.1 °C above average at Essendon Airport. Several sites broke summer temperature records: Essendon Airport and Coldstream had their highest summer mean temperature on record; Scoresby and Coldstream had their highest summer mean daily maximum temperature on record; and Essendon Airport also had its highest summer mean daily minimum temperature on record.

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Extremes in summer 2015-16
Hottest day 45.0 °C at Avalon Airport on 19 Dec 2015
Warmest days on average 28.8 °C at Coldstream
Coolest days on average 24.2 °C at Ferny Creek
Coldest day 13.6 °C at Ferny Creek on 14 Jan 2016
Coldest night 2.3 °C at Coldstream on 2 Dec 2015
Coolest nights on average 11.7 °C at Coldstream
Warmest nights on average 16.1 °C at Melbourne (Olympic Park)
Warmest night 28.5 °C at Moorabbin Airport on 20 Dec 2015
Warmest on average overall 21.5 °C at Viewbank
Coolest on average overall 18.6 °C at Ferny Creek
Wettest overall 217.6 mm at Ferny Creek
Driest overall 81.4 mm at Cerberus
Wettest day 72.0 mm at Avalon Airport on 28 Jan 2016
Strongest wind gust 100 km/h at St Kilda Harbour - RMYS on 13 Jan 2016

Record highest summer mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Scoresby Research Institute 28.0 27.9 in 2000 55 25.6
Coldstream 28.8 28.7 in 2000 21 26.8



Record highest summer mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Essendon Airport 15.2 14.6 in 2007 45 13.1

Highest summer mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
summer
Laverton RAAF 15.0 15.8 in 1980 13.3



Record highest summer mean temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Essendon Airport 21.3 21.1 in 2006 45 19.3
Coldstream 20.2 = 20.2 in 2000 21 19.0



Summary statistics for summer 2015-16
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
summer
2015-16
Diff
from
average
Highest for
summer
2015-16
Mean for
summer
2015-16
Diff
from
average
Lowest for
summer
2015-16
Total for
summer
2015-16
Average
for
summer
Rank of
summer
2015-16
Fraction of
summer
average
Avalon Airport 26.8 +1.2 45.0 19 Dec 2015 14.4 +1.0 6.7 2 Dec 2015 136.6 96.6 high 141%
Bundoora (Latrobe University) 27.7 +1.6 43.1 13 Jan 2016 14.6 +1.0 6.8 12 Dec 2015 125.0 152.3 average 82%
Cerberus 25.4 +1.5 42.5 13 Jan 2016 13.9 +0.6 5.3 13 Dec 2015 81.4 129.4 low 63%
Coldstream 28.8 +2.0 42.6 13 Jan 2016 11.7 +0.6 2.3 2 Dec 2015 134.2 152.6 average 88%
Cranbourne Botanic Gardens 26.3 +1.4 41.8 19 Dec 2015 13.7 +0.6 5.7 13 Dec 2015 123.4 161.5 low 76%
Essendon Airport 27.5 +2.0 43.8 13 Jan 2016 15.2 +2.1 7.8 2 Dec 2015 101.0 139.5 average 72%
Ferny Creek 24.2   38.9 13 Jan 2016 13.0   4.6 2 Dec 2015 217.6
Laverton RAAF 26.5 +1.5 43.9 19 Dec 2015 15.0 +1.7 5.2 2 Dec 2015 101.8 131.2 average 78%
Melbourne (Olympic Park) 26.2   42.2 13 Jan 2016 16.1   9.2 2 Dec 2015 103.8
Melbourne Airport 27.8 +2.0 43.6 13 Jan 2016 14.5 +1.2 6.8 2 Dec 2015 88.6 131.2 low 68%
Moorabbin Airport 26.9 +1.7 42.9 13 Jan 2016 15.0 +1.3 8.2 13 Dec 2015 117.8 149.2 average 79%
Scoresby Research Institute 28.0 +2.4 42.9 13 Jan 2016 14.2 +1.2 6.5 13 Dec 2015 143.6 181.5 average 79%
Viewbank 28.4 +1.5 43.8 13 Jan 2016 14.6 +0.7 7.5 12 Dec 2015 90.2 150.8 low 60%

Notes

The Seasonal climate summary lists the main features of the weather in Melbourne using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

A climate summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Tuesday 1 March 2016. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

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