Greater Melbourne in autumn 2018: warmer and drier than average

Daytime and night time temperatures were above average for all sites across Greater Melbourne. Rainfall totals for autumn were below average in most suburbs, except in Melbourne's outer north

Below average rainfall

  • Autumn rainfall across Greater Melbourne was generally below average, with very much below average rainfall in the northeast
  • In March rainfall was close to average in most suburbs, while in April and May it was below average across the Greater Melbourne area
  • Rainfall totals ranged generally between 60% and 80% of the autumn average
  • Ferny Creek recorded the highest rainfall total in Greater Melbourne during autumn with 258.4 mm
  • The highest daily rainfall total in autumn, 40.0 mm, was recorded at Lancefield (in the northern part of Greater Melbourne) on both 25 March and 15 April

Warm days and mild nights

  • Autumn daytime temperatures were warmer than average in all Melbourne suburbs
  • Mean maximum temperature ranged from 0.7 °C above average at Frankston to 1.9 °C above average at Wallan (Kilmore Gap)
  • The highest daytime temperature recorded in Greater Melbourne during autumn was 36.3 °C at Essendon Airport on 10 March
  • Wallan (Kilmore Gap) and Coldstream had their highest autumn mean daily maximum temperature on record
  • Coldstream had its warmest autumn night on record

Melbourne (Olympic Park)

  • Total rainfall for Melbourne (Olympic Park) was 105.0 mm
  • The mean daily maximum temperature for Melbourne (Olympic Park) was 21.5 °C. The warmest day was 35.1 °C on 10 March, and the coolest day was on 10 May when the temperature reached 12.8 °C
  • The mean daily minimum temperature for Melbourne (Olympic Park) was 12.5 °C. The coldest morning was 5.2 °C on 26 May, and the warmest morning was on 18 March when the minimum temperature was 22.6 °C
  • Strong winds

    • Melbourne's strongest recorded wind gust during autumn was 115 km/h at South Chanel Island on the 18th March
    • There were several more days (e.g. 14 April, 3 May and 11 May) during which maximum wind gusts over 70 km/h were recorded at most sites in the Greater Melbourne area

    Further information

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    Extremes in autumn 2018
    Hottest day 36.3 °C at Essendon Airport on 10 Mar
    Warmest days on average 22.4 °C at Viewbank
    Coolest days on average 18.1 °C at Ferny Creek
    Coldest day 7.6 °C at Ferny Creek on 10 May
    Coldest night -0.1 °C at Coldstream on 1 May
    Coolest nights on average 7.9 °C at Coldstream
    Warmest nights on average 12.8 °C at Frankston AWS
    Warmest night 23.5 °C at Coldstream on 18 Mar
    Warmest on average overall 17.0 °C at Melbourne (Olympic Park)
    Coolest on average overall 14.1 °C at Ferny Creek
    Wettest overall 258.4 mm at Ferny Creek
    Driest overall 79.2 mm at Laverton RAAF
    Wettest day 40.0 mm at Lancefield on 25 Mar
    40.0 mm at Lancefield on 15 Apr
    Strongest wind gust 115 km/h at South Channel Island on 18 Mar

    Record highest autumn mean daily maximum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    autumn
    Wallan (Kilmore Gap) 19.0 = 19.0 in 2016 24 17.1
    Coldstream 22.3 = 22.3 in 2016 23 20.8



    Record highest autumn daily minimum temperature
    New record
    (°C)
    Old
    record
    Years of
    record
    Average for
    autumn
    Coldstream 23.5 on 18 Mar 20.7 on 3 Apr 2005 24 7.4



    Summary statistics for autumn 2018
    Maximum temperatures
    (°C)
    Minimum temperatures
    (°C)
    Rainfall
    (millimetres)
    Mean for
    autumn
    2018
    Diff
    from
    average
    Highest for
    autumn
    2018
    Mean for
    autumn
    2018
    Diff
    from
    average
    Lowest for
    autumn
    2018
    Total for
    autumn
    2018
    Average
    for
    autumn
    Rank of
    autumn
    2018
    Fraction of
    autumn
    average
    Cerberus 20.7 +0.9 34.4 10 Mar 10.6 +0.3 1.6 26 May 147.8 175.7 average 84%
    Coldstream 22.3 +1.5 35.0 10 Mar 7.9 +0.5 -0.1 1 May
    Cranbourne Botanic Gardens 21.3 +1.3 34.6 10 Mar 10.6 +0.2 4.3 26 May 153.0 180.5 average 85%
    Essendon Airport 22.1 +1.9 36.3 10 Mar 11.4 +1.3 3.0 26 May 92.4 142.0 low 65%
    Ferny Creek 18.1   31.4 10 Mar 10.2   3.0 11 May 258.4
    Frankston AWS 20.0 +0.7 33.6 10 Mar 12.8 +0.3 6.4 26 May
    Laverton RAAF 21.5 +1.2 34.5 3 Mar 11.2 +1.1 2.1 26 May 79.2 125.5 low 63%
    Melbourne (Olympic Park) 21.5   35.1 10 Mar 12.5   5.2 26 May 105.0
    Melbourne Airport 22.0 +1.6 36.0 10 Mar 10.7 +0.3 2.6 26 May 93.4 120.0 average 78%
    Moorabbin Airport 21.3 +1.0 34.5 10 Mar 11.6 +0.9 3.4 26 May 106.0 174.3 v low 61%
    Scoresby Research Institute 21.9 +1.7 35.3 10 Mar 10.4 +0.1 2.3 26 May 120.6 209.5 v low 58%
    Viewbank 22.4 +1.1 35.5 10 Mar 10.7 +0.4 2.9 18 Apr 119.6 150.0 low 80%
    Wallan (Kilmore Gap) 19.0 +1.9 31.4 10 Mar 9.6 +0.7 3.5 11 May 158.0 156.0 average 101%

    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 June 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