Melbourne in summer 2016–17: Warm but not extreme

Summer rainfall was mostly close to average across Melbourne. Daytime temperatures were generally warmer than usual, but no site reached 40 °C. There were some very warm nights, but average overnight temperatures were cooler than usual in the outer southeast.

Rainfall mostly near average

  • Rainfall was mostly average tending to above average in parts of the east
  • The main exception was in the far north where Wallan (Kilmore Gap) only recorded about half its typical summer rainfall
  • The largest totals were recorded in the Dandenong Ranges, as is usual
  • Heavy rainfall on the afternoon of 29 December made a significant contribution to the seasonal totals at some stations and delivered Bundoora (Latrobe University) their highest summer daily rainfall on record (more information in the Special Climate Statement Humidity, heavy rain and heat in central and southern Australia)

Very warm days in the north; some very warm nights

  • Melbourne avoided much of the exceptional heat in southeast Australia in early 2017, including across northern Victoria, due to a more maritime airflow
  • No site around Greater Melbourne reached 40 °C this summer, for the first time since summer 2004–05; the highest temperature was 38.9 °C at Essendon Airport on 17 January
  • While the number of extremely hot days was lower than average, there were more days above 25 °C, 30 °C and 35 °C for Melbourne city than usual
  • Both Essendon and Moorabbin Airports set new records for the number of nights that did not drop below 25 °C in a season (3 and 2 nights respectively)
  • Moorabbin and Laverton airports had their warmest summer night (highest daily minimum temperature) on record
  • Overnight temperatures were a little below average in the outer southeast

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Extremes in summer 2016-17
Hottest day 38.9 °C at Essendon Airport on 17 Jan 2017
Warmest days on average 27.5 °C at Viewbank
Coolest days on average 22.8 °C at Ferny Creek
Coldest day 11.8 °C at Ferny Creek on 19 Feb 2017
Coldest night 2.8 °C at Coldstream on 19 Dec 2016
Coolest nights on average 11.6 °C at Coldstream
Warmest nights on average 15.3 °C at Melbourne (Olympic Park)
Warmest night 28.9 °C at Laverton RAAF on 8 Jan 2017
Warmest on average overall 20.8 °C at Viewbank
Coolest on average overall 17.5 °C at Ferny Creek
Wettest overall 319.0 mm at Ferny Creek
Driest overall 72.6 mm at Wallan (Kilmore Gap)
Wettest day 108.0 mm at Bundoora (Latrobe University) on 30 Dec 2016
Strongest wind gust 89 km/h at Fawkner Beacon on 28 Dec 2016
89 km/h at Wallan (Kilmore Gap) on 28 Dec 2016

Record highest summer daily rainfall
New record
(mm)
Old
record
Years of
record
Bundoora (Latrobe University) 108.0 on 30 Dec 2016 104.8 on 3 Feb 2005 39



Record highest summer daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
summer
Laverton RAAF 28.9 on 8 Jan 2017 = 28.9 on 21 Jan 1997 74 13.4
Moorabbin Airport 28.7 on 8 Jan 2017 28.6 on 15 Jan 2014 46 13.7
Coldstream 24.7 on 29 Dec 2016 24.4 on 12 Jan 2010 23 11.2



Summary statistics for summer 2016-17
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
summer
2016-17
Diff
from
average
Highest for
summer
2016-17
Mean for
summer
2016-17
Diff
from
average
Lowest for
summer
2016-17
Total for
summer
2016-17
Average
for
summer
Rank of
summer
2016-17
Fraction of
summer
average
Cerberus 24.3 +0.4 36.8 23 Jan 2017 13.1 -0.3 4.9 3 Dec 2016 143.0 129.9 average 110%
Coldstream 27.2 +0.3 38.2 17 Jan 2017 11.6 +0.4 2.8 19 Dec 2016 139.8 152.0 average 92%
Cranbourne Botanic Gardens 25.4 +0.4 36.5 23 Jan 2017 12.6 -0.5 6.2 19 Dec 2016 208.4 163.4 high 128%
Essendon Airport 27.1 +1.5 38.9 17 Jan 2017 14.2 +1.1 6.5 19 Dec 2016 115.0 139.1 average 83%
Ferny Creek 22.8   33.2 17 Jan 2017 12.1   5.7 9 Dec 2016 319.0
Frankston AWS 24.3 +0.2 35.0 25 Dec 2016 14.6 -0.5 8.8 19 Dec 2016
Laverton RAAF 26.1 +1.1 38.8 28 Dec 2016 14.1 +0.7 5.6 18 Dec 2016 99.8 130.8 average 76%
Melbourne (Olympic Park) 25.9   38.2 28 Dec 2016 15.3   8.8 19 Dec 2016 111.4
Melbourne Airport 26.9 +1.0 38.3 17 Jan 2017 13.4 +0.1 5.5 19 Dec 2016 130.4 131.3 average 99%
Moorabbin Airport 25.7 +0.4 38.0 28 Dec 2016 14.3 +0.6 7.4 19 Dec 2016 167.0 149.5 average 112%
Scoresby Research Institute 26.7 +1.1 37.5 17 Jan 2017 13.4 +0.3 6.5 19 Dec 2016 215.0 182.0 high 118%
Viewbank 27.5 +0.5 38.2 17 Jan 2017 14.1 +0.2 7.5 21 Feb 2017 187.2 152.8 average 123%
Wallan (Kilmore Gap) 25.4 +1.5 38.5 17 Jan 2017 11.9 +0.2 4.6 18 Dec 2016 72.6 140.6 v low 52%

Notes

The Seasonal climate summary, generally published on the first working day of each month, 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. 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 statement has been prepared based on information available at 10 am on Wednesday 1 March 2017. 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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
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