Greater Melbourne in spring 2018: dry with warm days

Spring in Melbourne was drier than average, despite some heavy rain at times. Daytime temperatures were warmer than average, while night time temperatures were close to average.

Drier than average

  • Spring rainfall totals were average to below average throughout Greater Melbourne
  • Rainfall totals ranged between 58% of average at Wallan (Kilmore Gap) to 98% of average at Coldstream
  • The highest daily rainfall total in spring, 47.0 mm, was recorded at Ferny Creek on 23 November
  • The wettest place in Greater Melbourne in spring was also Ferny Creek, with 315.6 mm recorded during the season

Warmer than average days

  • Mean maximum temperatures for spring were warmer than average at all sites, ranging from 0.2 °C above average at Viewbank to 1.3 °C above average at Essendon Airport
  • The hottest temperature in Greater Melbourne during spring was 34.8 °C, recorded at Laverton RAAF on 1 November; on the same day all sites except Cerberus had their hottest day this season
  • Mean minimum temperatures were close to or below the long-term average at most sites in Greater Melbourne
  • Spring started with cold nights, with most suburbs having the coldest night of the season on 3 or 4 September
  • The coldest night time temperature in Greater Melbourne during spring was −1.9 °C, recorded at Coldstream on 3 September

Melbourne (Olympic Park)

  • Melbourne (Olympic Park) site suffered equipment outages on 9 and 10 October and the 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 in October. Total rainfall at this site in September was 16.4 mm and in November it was 97.8 mm
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 20.2 °C. The warmest day was 34.3 °C on 1 Nov, and the coolest day was on 2 Sep when the temperature reached 12.3 °C
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 10.6 °C. The coldest morning was 3.4 °C on 4 Sep, and the warmest morning was on 20 Nov when the minimum temperature was 22.5 °C

Strong winds, flash flooding and hail

  • The strongest wind gust recorded in Melbourne during spring was 104 km/h at Viewbank on 20 November
  • Squally winds swept across Melbourne on 2 November, whipping up dust and reducing visibility locally
  • A slow-moving storm caused flash flooding in Melbourne on 6 November, as more than 30 mm of rain fell in 3 hours; this resulted in traffic delays and thousands of residents were left without power
  • A thin line of thunderstorms produced hail in parts of southeast and eastern Melbourne on the 7th, leaving some roads white with ice

Further information

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Extremes in spring 2018
Hottest day 34.8 °C at Laverton RAAF on 1 Nov
Warmest days on average 20.8 °C at Viewbank
Coolest days on average 16.5 °C at Ferny Creek
Coldest day 8.6 °C at Ferny Creek on 23 Sep
Coldest night -1.9 °C at Coldstream on 3 Sep
Coolest nights on average 6.1 °C at Coldstream
Warmest nights on average 10.6 °C at Melbourne (Olympic Park)
Warmest night 22.7 °C at Bundoora (Latrobe University) on 20 Nov
Warmest on average overall 15.4 °C at Melbourne (Olympic Park)
Coolest on average overall 12.3 °C at Ferny Creek
12.3 °C at Wallan (Kilmore Gap)
Wettest overall 315.6 mm at Ferny Creek
Driest overall 77.2 mm at Burnside
Wettest day 47.0 mm at Ferny Creek on 23 Nov
Strongest wind gust 104 km/h at Viewbank on 20 Nov

Summary statistics for spring 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
spring
2018
Diff
from
average
Highest for
spring
2018
Mean for
spring
2018
Diff
from
average
Lowest for
spring
2018
Total for
spring
2018
Average
for
spring
Rank of
spring
2018
Fraction of
spring
average
Cerberus 19.0 +0.5 31.6 13 Nov 9.1 +0.1 -0.2 4 Sep 156.4 187.1 average 84%
Coldstream 20.3 +0.3 31.5 1 Nov 6.1 -1.0 -1.9 3 Sep 202.8 207.9 average 98%
Essendon Airport 20.7 +1.3 34.5 1 Nov 9.3 +0.9 1.4 4 Sep 143.0 168.5 average 85%
Ferny Creek 16.5   28.9 1 Nov 8.0   0.9 16 Sep 315.6
Laverton RAAF 20.5 +1.2 34.8 1 Nov 9.2 +0.8 0.8 4 Sep 103.6 156.2 low 66%
Melbourne (Olympic Park) 20.2   34.3 1 Nov 10.6   3.4 4 Sep
Melbourne Airport 20.5 +1.1 34.2 1 Nov 8.5 -0.2 1.7 4 Sep 152.0 161.5 average 94%
Moorabbin Airport 20.2 +0.9 33.1 1 Nov 9.4 -0.1 1.7 24 Sep 165.4 195.3 average 85%
Scoresby Research Institute 20.3 +1.2 31.9 1 Nov     0.8 3 Sep 211.6 245.9 average 86%
Viewbank 20.8 +0.2 34.2 1 Nov 8.5 -0.9 0.5 4 Sep
Wallan (Kilmore Gap) 17.2 +0.8 30.4 1 Nov 7.5 +0.3 1.0 29 Sep 104.8 180.4 average 58%

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.

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 Monday 3 December 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