Melbourne in winter 2017: Near average temperatures, below average rainfall

Daytime temperatures tended slightly warmer than average during winter for most locations across Melbourne, nights were generally cooler than average. Winter rainfall totals were generally below average, owing mostly to drier conditions throughout June and July; August rainfall was closer to average.

This summary includes data from observing sites in or near the Greater Melbourne “Greater Capital City Statistical Area” (GCCSA) – see the notes.

Drier than average

  • Rainfall was below average across Melbourne, with particularly dry conditions occurring during June and July; August rainfall tended closer to average
  • The drier than average winter period resulted in locations in the northern suburbs reporting their driest winter for at least 20 years

Mild days, cool nights

  • Winter 2017 daytime temperatures tended to be warmer than average across most suburbs of Melbourne. Minimum temperatures were cooler than average
  • The mean minimum temp at Melbourne (Olympic Park) was 7.0 °C; this is the coolest winter nights since the site opened in 2013, and the coolest since 7.0 °C was recorded at the La Trobe Street site in 1997
  • The cold nights were particularly notable in Melbourne's north, where some locations had their coolest winter nights in 20 years
  • A particularly strong cold spell at the start of July brought the east of Melbourne its coldest nights since August 1997

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 101.0 mm
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 14.8 °C. The warmest day was 20.1 °C on 14 Aug, and the coolest day was on 3 Aug when the temperature reached 9.0 °C
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 7.0 °C. The coldest morning was 0.8 °C on 2 Jul, and the warmest morning was on 14 Aug when the minimum temperature was 12.3 °C

Cold fronts and Snow

  • A cold front moved through Victoria in late August, bringing snow flurries to low levels (around 250 to 350 m) in the Dandenong Ranges, at Kilmore Gap, and at Arthurs Seat on the Mornington Peninsula

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Extremes in winter 2017
Hottest day 21.3 °C at Laverton RAAF on 14 Aug
Warmest days on average 14.8 °C at Melbourne (Olympic Park)
Coolest days on average 10.1 °C at Ferny Creek
10.1 °C at Wallan (Kilmore Gap)
Coldest day 5.7 °C at Wallan (Kilmore Gap) on 27 Jun
Coldest night -5.3 °C at Coldstream on 2 Jul
Coolest nights on average 3.0 °C at Coldstream
Warmest nights on average 7.8 °C at Frankston AWS
Warmest night 12.3 °C at Bundoora (Latrobe University) on 14 Aug
12.3 °C at Melbourne (Olympic Park) on 14 Aug
Warmest on average overall 10.9 °C at Melbourne (Olympic Park)
Coolest on average overall 7.1 °C at Wallan (Kilmore Gap)
Wettest overall 346.2 mm at Warburton (O'Shannassy Reservoir (Quarte
Wettest day 53.4 mm at Warburton (O'Shannassy Reservoir (Quarte on 16 Aug
Strongest wind gust 107 km/h at Fawkner Beacon on 29 Jul


Lowest winter total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
winter
Preston Reservoir 80.2 71.8 in 1928 153.5
Bundoora (Latrobe University) 102.0 83.6 in 1997 162.3



Record lowest winter temperature
New record
(°C)
Old
record
Years of
record
Average for
winter
Cerberus -3.0 on 3 Jul -2.9 on 19 Jul 2015 26 6.6



Lowest winter mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
winter
Melbourne Airport 5.2 5.1 in 1997 5.9
Wallan (Kilmore Gap) 4.0 3.7 in 1997 4.4



Summary statistics for winter 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
winter
2017
Diff
from
average
Highest for
winter
2017
Mean for
winter
2017
Diff
from
average
Lowest for
winter
2017
Total for
winter
2017
Average
for
winter
Rank of
winter
2017
Fraction of
winter
average
Bundoora (Latrobe University) 14.4 +0.3 19.9 10 Aug 5.1 -0.9 -2.7 2 Jul 102.0 162.3 v low 63%
Cerberus 14.1 -0.1 19.4 14 Aug 5.9 -0.7 -3.0 3 Jul 174.0 220.8 low 79%
Coldstream 14.0 0.0 19.5 10 Aug 3.0 -1.1 -5.3 2 Jul 143.4 196.0 v low 73%
Essendon Airport 14.5 +0.8 19.0 14 Aug 5.7 0.0 -2.0 1 Jul 84.2 131.7 v low 64%
Ferny Creek 10.1   15.8 14 Aug 5.0   1.3 28 Aug 268.8
Frankston AWS 13.1 -0.3 18.2 10 Aug 7.8 -0.5 2.0 1 Jul
Laverton RAAF 14.6 +0.3 21.3 14 Aug 5.1 -0.4 -1.7 1 Jul 86.6 121.7 low 71%
Melbourne (Olympic Park) 14.8   20.1 14 Aug 7.0   0.8 2 Jul 101.0
Melbourne Airport 14.2 +0.5 19.8 14 Aug 5.2 -0.7 -0.6 2 Jul 72.8 119.8 v low 61%
Moorabbin Airport 14.5 +0.2 20.3 14 Aug 6.4 -0.2 -2.1 2 Jul 114.8 183.4 v low 63%
Scoresby Research Institute 14.1 +0.5 20.0 14 Aug 5.5 -0.7 -0.6 1 Jul 169.8 223.9 low 76%
Viewbank 14.4 -0.1 20.0 14 Aug 5.1 -1.1 -2.8 2 Jul 108.6 158.5 v low 69%
Wallan (Kilmore Gap) 10.1 +0.3 14.1 16 Jun 4.0 -0.4 0.0 16 Jul 142.2 190.8 low 75%

Notes

The Seasonal 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.

In September 2017 this summary was broadened to include 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 Friday 1 September 2017. 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

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