Victoria in autumn 2018: warm with below average rainfall

Victoria had a very warm autumn, with the State's mean temperature the fourth-warmest on record. Rainfall totals for autumn were below average across most of Victoria, with large areas of very much below average rainfall in the north and east of the State.

Below average rainfall

  • Rainfall was below average over most of Victoria during autumn, with well below average rainfall in large areas in the north and east of the State
  • Averaged across the State rainfall was 39.2% below the autumn average of 156.8 mm; it was the lowest autumn rainfall since 2008
  • This autumn was much drier than autumn 2017
  • Falls Creek was the wettest place in Victoria during autumn, recording 364.6 mm
  • The highest daily rainfall total, 95.0 mm, was recorded at Cann River (East Gippsland) to 9am on the 12 May, when a complex low pressure system brought widespread rainfall to Victoria

Temperatures well above average

  • Victoria's mean temperature for autumn was 1.17 °C above average, the fourth-warmest autumn on record (and warmer than autumn 2017)
  • Mean daytime temperatures were well above average across Victoria, with many sites (mostly in the north) having their highest autumn mean daily maximum temperature on record
  • The State's mean maximum temperature was 1.74 °C above the long-term average for autumn, the second-warmest on record
  • Daytime temperatures in April were the second highest on record (monthly anomaly of 3.45 °C); March and May daytime temperatures were also above average, but less extreme
  • The highest autumn daytime temperature in Victoria was 39.3 °C, recorded in Mildura on 10 April and in Hopetoun on 11 April during a prolonged heatwave
  • The State mean minimum temperature was 0.58 °C above average, about 0.4 °C cooler than in autumn 2017
  • The morning of 18 March was very warm across Victoria, with several sites reporting their warmest autumn night on record
  • Despite the generally mild autumn, there were some cold nights and cool days scattered through the season
  • A pool of cold air followed the passage of a complex low pressure system and brought a significant drop in temperatures across the State on the 10th and 11th of May
  • Victoria's lowest maximum and minimum temperatures for autumn were recorded during this event, with Mount Hotham only reaching −2.6 °C on the 10th, and falling to −6.0 °C on the morning of the 11th

Strong winds, fires and snow

  • The strongest winds during autumn, associated with the passage of a complex low pressure system, were recorded on 11 May, with gusts of 143 km/h reported at Mount Hotham
  • A number of bushfires devastated parts of southwestern Victoria on the 17th and 18th of March; high temperatures and strong winds ahead of the cold front contributed to severe fire weather conditions
  • The outbreak of cold air on 26 of March brought the year's first snowfalls to Victorian Alpine areas
  • More snow fell across the Alpine region on the 11th and 12th of May, as Antarctic air swept across Victoria following the passage of a complex low pressure system

Further information

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Extremes in autumn 2018
Hottest day 39.3 °C at Mildura Airport on 10 Apr
39.3 °C at Hopetoun Airport on 11 Apr
Warmest days on average 25.9 °C at Mildura Airport
Coolest days on average 10.2 °C at Mount Hotham
Coldest day -2.6 °C at Mount Hotham on 10 May
Coldest night -6.0 °C at Mount Hotham on 11 May
Coolest nights on average 3.5 °C at Mount Hotham
Warmest nights on average 13.9 °C at Wilsons Promontory Lighthouse
Warmest night 24.2 °C at Kerang on 12 Apr
Warmest on average overall 18.4 °C at Mildura Airport
Coolest on average overall 6.8 °C at Mount Hotham
Wettest overall 364.6 mm at Falls Creek (Rocky Valley)
Wettest day 95.0 mm at Cann River on 12 May
Strongest wind gust 143 km/h at Mount Hotham on 11 May
143 km/h at Mount Hotham on 12 May

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest autumn daily rainfall
New record
(mm)
Old
record
Years of
record
Mortlake Racecourse 47.4 on 11 May 37.0 on 6 May 2000 24



Record lowest autumn total rainfall
New record
(mm)
Old
record
Years of
record
Average for
autumn
Lake Tyers 51.8 56.3 in 1972 55 190.4
Mount Nowa Nowa 74.2 75.0 in 1998 23 193.5

Record highest autumn temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Mallacoota 37.2 on 12 Apr 34.1 on 8 Apr 1998 26 20.0



Record lowest autumn daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
Castlemaine Prison 3.5 on 31 May 5.4 on 31 May 1977 48 20.2



Record highest autumn mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
East Sale 21.8 = 21.8 in 2016 72 20.3
Walpeup Research 25.5 = 25.5 in 2016 69 23.1
Ararat Prison 21.5 = 21.5 in 2017 48 19.7
Castlemaine Prison 21.9 = 21.9 in 1971 47 20.2
Point Hicks (Lighthouse) 21.1 21.0 in 2007 46 19.7
Bairnsdale Airport 22.2 22.1 in 2016 36 20.8
Wangaratta Aero 24.5 = 24.5 in 2016 30 22.5
Bendigo Airport 23.4 23.1 in 2016 26 21.3
Falls Creek 11.5 11.4 in 2002 26 10.0
Mount Moornapa 20.9 20.3 in 2016 24 18.5
Redesdale 23.2 22.6 in 2017 24 20.7
Wallan (Kilmore Gap) 19.0 = 19.0 in 2016 24 17.1
Yarrawonga 25.1 24.9 in 2016 24 23.0
Coldstream 22.3 = 22.3 in 2016 23 20.8
Combienbar AWS 20.0 = 20.0 in 2016 23 17.9
Mount Nowa Nowa 20.9 20.7 in 2016 22 19.2
Swan Hill Aerodrome 25.4 25.3 in 2016 21 23.7

Highest autumn mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
autumn
Rutherglen Research 24.8 24.9 in 1923* 22.1

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported




Record highest autumn daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
autumn
East Sale 21.0 on 18 Mar 20.8 on 5 Mar 1949 73 8.8
Bairnsdale Airport 22.1 on 18 Mar 21.5 on 3 Mar 2000 38 8.9
Gelantipy 21.1 on 12 Apr 20.4 on 13 Mar 1998 26 7.2
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
North Mallee (district 76)
Mildura Airport 25.9 +2.2 39.3 10 Apr 10.9 +0.4 2.4 17 May 21.4 63.9 low 33%
Ouyen (Post Office)     39.0 10 Apr 10.5 +0.6 3.3 17 May 28.7 73.1 low 39%
Walpeup Research 25.5 +2.4 38.9 11 Apr 10.7 +0.3 2.6 16 May
South Mallee (district 77)
Hopetoun Airport 25.2 +1.4 39.3 11 Apr 8.8 -0.4 0.1 17 May 27.6 61.8 low 45%
Swan Hill Aerodrome 25.4 +1.7 39.0 11 Apr 9.8 +0.3 -0.2 26 May 27.6 63.0 low 44%
North Wimmera (district 78)
Nhill Aerodrome 23.2 +0.5 36.8 11 Apr 9.5 +0.4 2.0 14 May 48.6 64.9 average 75%
Warracknabeal Museum 23.8 +1.3 37.2 11 Apr 9.3 +0.1 -0.5 26 May 43.9 85.6 low 51%
South Wimmera (district 79)
Edenhope Airport 22.1 +0.9 36.1 10 Mar 9.9 +0.5 3.0 16 May 93.8 105.8 average 89%
Grampians (Mount William) 14.3 +1.5 28.8 9 Mar 6.4 +0.3 -0.9 11 May 254.6 261.3 average 97%
Horsham Aerodrome 23.1 +0.8 37.0 11 Apr 8.3 +0.7 0.6 26 May 54.2 73.1 average 74%
Kanagulk 22.1 +0.8 36.1 10 Mar 9.1 +0.3 0.8 26 May 102.6 104.6 average 98%
Longerenong 23.3 +1.6 37.0 11 Apr 8.6 +0.3 0.7 14 May 58.0 94.6 low 61%
Pyrenees (Ben Nevis) 17.3 +1.7 31.7 10 Mar 8.5 +0.5 0.4 11 May
Stawell Aerodrome 21.8 +1.0 34.7 10 Mar 9.5 +0.7 1.6 30 May 74.8 88.3 average 85%
Lower North (district 80)
Charlton 24.4 +1.3 38.9 11 Apr 9.0 -0.5 -0.2 26 May 53.0 78.7 low 67%
Echuca Aerodrome 24.6 +2.2 38.2 11 Apr 9.7 +0.1 0.1 26 May 44.4 103.2 low 43%
Kerang 25.0 +2.1 39.1 11 Apr 10.6 +0.9 1.2 26 May 34.2 88.6 low 39%
Kyabram 24.2 +2.3 36.7 11 Mar 9.6 +0.5 1.3 17 May 50.8 108.2 low 47%
Upper North (district 81)
Bendigo Airport 23.4 +2.1 35.0 11 Mar 9.0 +0.7 1.1 19 May 70.0 107.5 low 65%
Shepparton Airport 24.0 +1.5 35.8 11 Mar 9.3 +0.5 1.3 14 May 52.6 98.4 low 53%
Tatura Inst Sustainable Ag 23.3 +1.6 35.4 11 Mar 9.3 +0.6 1.1 26 May 52.2 112.6 low 46%
Yarrawonga 25.1 +2.1 36.7 11 Apr 9.5 +0.2 0.5 17 May 51.4 101.5 low 51%
Lower Northeast (district 82)
Benalla Airport 24.1 +1.6 35.2 11 Mar 8.2 -0.5 -0.8 17 May 59.4 145.9 v low 41%
Dartmouth Reservoir 22.0 +1.2 32.5 11 Mar 7.6 0.0 0.6 17 May 157.8 203.5 average 78%
Hunters Hill 18.6 +1.9 28.6 11 Mar 9.4 +0.9 -0.4 11 May 179.2 231.8 average 77%
Rutherglen Research 24.8 +2.7 35.5 11 Apr 7.3 -0.1 -2.1 17 May 63.6 130.4 low 49%
Strathbogie 20.6 +1.5 32.5 11 Mar 6.2 0.0 -1.1 15 May 132.0 217.8 low 61%
Wangaratta Aero 24.5 +2.0 35.9 11 Mar 6.9 -0.5 -2.2 17 May
Upper Northeast (district 83)
Falls Creek 11.5 +1.5 21.1 9 Mar 4.2 +0.9 -5.2 11 May 235.2 282.6 average 83%
Mount Buller 11.6 +1.5 21.5 11 Mar 4.5 +0.7 -5.1 11 May 335.2 321.1 average 104%
Mount Hotham 10.2 +1.5 20.0 11 Mar 3.5 +0.7 -6.0 11 May
Omeo 20.8 +1.9 32.4 10 Mar 5.9 +0.2 -1.5 26 May
East Gippsland (district 84)
Combienbar AWS 20.0 +2.1 31.4 18 Mar 10.5 +0.7 2.2 11 May 87.2 222.9 v low 39%
Gabo Island Lighthouse 20.4 +1.4 36.5 12 Apr     7.6 11 May 78.0 254.9 v low 31%
Lakes Entrance (Eastern Beach Road) 20.7 +0.3 34.4 12 Apr 11.2 +0.1 3.4 26 May 48.8 158.3 v low 31%
Mallacoota 21.4 +1.4 37.2 12 Apr 11.9 +0.1 4.6 1 May 79.8 248.0 v low 32%
Mount Nowa Nowa 20.9 +1.7 32.8 17 Mar 11.3 +0.5 3.1 11 May 74.2 193.5 lowest 38%
Orbost 22.6 +1.7 36.4 18 Mar 11.0 +0.2 3.8 11 May 51.0 182.9 v low 28%
Point Hicks (Lighthouse) 21.1 +1.4 35.4 12 Apr     6.4 12 May 113.7 246.3 v low 46%
West Gippsland (district 85)
Bairnsdale Airport 22.2 +1.4 34.2 12 Apr 9.2 +0.3 0.8 26 May 56.8 145.5 v low 39%
Corner Inlet (Yanakie) 19.8   33.5 17 Mar 11.0   2.1 26 May 203.6
East Sale 21.8 +1.5 32.3 17 Mar 9.4 +0.6 0.5 26 May 57.2 147.1 v low 39%
East Sale Airport 22.1   33.7 11 Mar 9.7   1.2 26 May 63.6
Morwell (Latrobe Valley Airport) 21.9 +1.3 34.8 10 Mar 9.2 +0.4 0.3 26 May 101.8 158.0 low 64%
Mount Baw Baw 11.1 +1.0 21.4 10 Mar 4.3 +0.4 -3.7 11 May
Mount Moornapa 20.9 +2.4 35.3 17 Mar 10.3 +0.3 3.4 11 May 81.2 186.0 low 44%
Nilma North (Warragul) 21.1   34.7 10 Mar 9.7   0.2 26 May 169.0
Pound Creek 20.8 +0.4 33.1 17 Mar 10.2 +0.4 0.8 14 May 227.2 212.3 average 107%
Wilsons Promontory Lighthouse 18.2 +1.0 29.2 17 Mar 13.9 +1.2 7.6 11 May 236.2 267.2 average 88%
Yarram Airport 21.4 +0.9 34.4 17 Mar 9.5 +0.4 0.6 26 May 80.4 143.7 low 56%
East Central (district 86)
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
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%
Rhyll 20.2 +0.7 31.3 10 Mar 13.2 +0.5 7.8 11 May 156.8 171.7 average 91%
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%
Wonthaggi 20.5 +0.8 33.9 10 Mar 11.4 +0.9 3.8 14 May 232.6 237.6 average 98%
West Central (district 87)
Avalon Airport 22.0 +1.3 35.3 17 Mar 10.6 +0.6 2.1 26 May 89.4 100.2 average 89%
Breakwater (Geelong Racecourse) 21.6   34.8 17 Mar 11.1   2.4 26 May 87.8
Laverton RAAF 21.5 +1.2 34.5 3 Mar 11.2 +1.1 2.1 26 May 79.2 125.5 low 63%
Sheoaks 20.6 +1.3 35.2 10 Mar 9.5 +0.4 1.3 26 May 106.2 97.9 high 108%
North Central (district 88)
Castlemaine Prison 21.9 +1.7 34.2 9 Mar 8.7 +0.7 1.5 19 May 133.7 131.6 average 102%
Eildon Fire Tower 19.5 +1.2 30.8 11 Mar 9.7 +0.5 2.1 11 May 121.0 137.6 average 88%
Lake Eildon 22.8 +1.9 34.0 11 Mar 8.1 -0.1 0.6 17 May 152.4 190.1 average 80%
Mangalore Airport 23.1 +1.6 35.1 11 Mar 9.1 +0.1 -0.7 17 May 94.4 127.2 low 74%
Maryborough 22.3 +1.5 35.7 11 Apr 9.4 +0.9 2.2 26 May 91.2 118.7 average 77%
Redesdale 23.2 +2.5 36.0 11 Mar 7.6 -0.2 0.2 19 May 106.2 129.3 average 82%
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%
Western Plains (district 89)
Ararat Prison 21.5 +1.8 34.0 10 Mar 7.6 +0.1 0.0 18 Apr 114.8 126.4 average 91%
Ballarat Aerodrome 19.7 +1.8 32.6 10 Mar 8.2 +0.5 0.6 30 May 130.0 157.5 average 83%
Westmere 21.0 +0.7 35.3 10 Mar 8.2 +0.1 -0.9 26 May 103.4 108.0 average 96%
West Coast (district 90)
Cape Nelson Lighthouse 18.9 +0.7 33.8 17 Mar 12.7 +0.3 7.1 26 May 129.2 154.0 low 84%
Cape Otway Lighthouse 18.6 +0.6 33.4 17 Mar 12.7 +1.0 6.4 26 May 222.2 217.4 average 102%
Casterton 21.7 +1.2 36.8 10 Mar 9.5 +0.4 0.6 31 May 131.4 145.9 average 90%
Colac (Mount Gellibrand) 19.9 +0.8 35.0 10 Mar 10.2 +0.3 3.0 30 May 118.0 114.3 average 103%
Dartmoor 20.9   36.7 10 Mar 10.1   2.1 29 Apr 153.2 178.7 low 86%
Hamilton Airport 20.6 +0.7 35.3 10 Mar 9.4 +1.0 2.0 26 May 128.4 128.9 average 100%
Mortlake Racecourse 21.5 +1.4 37.7 10 Mar 8.7 +0.5 0.6 18 Apr 148.6 130.3 high 114%
Port Fairy AWS 19.8 +0.5 34.5 17 Mar 11.7 +0.7 4.6 26 May 151.8 157.8 average 96%
Portland (Cashmore Airport) 19.2 +0.7 34.6 10 Mar 10.6 +0.6 1.4 26 May 225.4 190.0 high 119%
Warrnambool Airport NDB 20.7 +0.8 36.6 10 Mar 10.0 +0.9 2.5 26 May 162.2 174.4 average 93%

Notes

The Seasonal climate summary, generally published on the first working day of each month, lists the main features of the weather in Victoria 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 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