Victoria in winter 2010: Average rainfall attributed to a record August

Exceptional rainfall throughout August has countered a particularly dry July leading to average winter conditions for the first time in years. The dominance of high pressures during the first half of winter, led to several cold snaps and sub-zero overnight temperatures state-wide. Despite some warmer than average days in June and July, cloud cover significantly moderated temperatures in August, which brought both maximum and minimum temperatures for the season close to the long-term average.

  • Above average rainfall in the south and west
  • Average daytime temperatures
  • Slightly below average nights

Rainfall

Across the State, average or above average winter rainfall has been reported, with the exception of Gippsland, where the residual anomaly of a record dry July remains. The dry conditions in June and July occurred due to the dominance of high pressure systems across the Victorian region. This trend did not persist into August where a shift to frequent low pressure systems and cold fronts brought welcome widespread falls.

Large areas to the west and south of Victoria recorded above average rainfall this winter, with some stations reporting their highest total winter rainfall on record. Weeaproinah was the standout this season, receiving a winter total of 957.4 mm after record monthly falls in August. A heavy rainfall event in early June brought the wettest single day, with 233.2 mm falling in the Goulburn River.

Temperature

Maximum temperature

Maximum temperatures for the season were close to average, despite warmer than usual temperatures in June and July due to the prevalence of clear skies. Cold days throughout August were unusual in the context of recent years, with the Alpine region claiming one of the best snow seasons this decade. Icy temperatures, both day and night, were not uncommon throughout the season, the coldest day a frosty -5.3C at Mount Hotham on the 28th of June. Mount Hotham also experienced the coolest days on average for the month, a chilly 0.0C.

Several locations across the State also recorded their lowest winter mean daytime temperature since 1989, including Mildura Airport and Hamilton Airport. This highlights the unusual conditions experienced this season, as Mildura Airport also recorded the warmest winter day on the 31st of August (21.5C) and the warmest days on average for Victoria this winter (15.4C).

Minimum temperature

Despite some very cool nights in June and July, the minimum temperatures experienced across Victoria this winter were close to average overall. Stations along the Victorian coast experienced particularly mild nights this winter, with Wilsons Promontory Lighthouse experiencing the warmest nights on average (9.4C). As would be expected, the coldest nights were observed in the Alpine region, with Mount Hotham averaging a frosty -3.9C this winter. The coldest night was an icy -8.2C at Dinner Plain on the 20th of July, however most locations across the State recorded their coldest winter nights on the 16th/28th of June and the 25th of August.

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Extremes in winter 2010
Hottest day 21.5 C at Mildura Airport on 31 Aug
Warmest days on average 15.4 C at Mildura Airport
Coolest days on average 0.0 C at Mount Hotham
Coldest day -5.3 C at Mount Hotham on 28 Jun
Coldest night -8.2 C at Dinner Plain (Mount Hotham Airport) on 20 Jul
Coolest nights on average -3.9 C at Mount Hotham
Warmest nights on average 9.4 C at Wilsons Promontory Lighthouse
Warmest night 13.5 C at Moorabbin Airport on 25 Jun
Wettest overall 957.4 mm at Weeaproinah
Wettest day 233.2 mm at Goulburn River at Goulburn Weir HG on 7 Jun
Highest wind gust 148 km/h at Grampians (Mount William) on 11 Aug

Maps

Anomaly in mean maximum temperature

Map of Anomaly in mean maximum temperature

Anomaly in mean minimum temperature

Map of Anomaly in mean minimum temperature

Rainfall deciles

Map of Rainfall deciles


Record highest total winter rainfall
Total rainfall
for winter 2010 (mm)
Previous highest
for winter
Years of
record
Average for
winter
Derrinallum (Post Office) 287.2 285.5 in 1964 54 194.4
Glenthompson 260.7 260.6 in 1981 42 186.2

Highest total winter rainfall for at least 20 years
Total rainfall
for winter 2010 (mm)
Most recent winter
this high or higher
Years since
higher
Average for
winter
Beaufort 317.4 345.5 in 1981 28 205.6
Lismore (Post Office) 249.4 256.0 in 1981 28 180.1
Wickliffe 255.6 273.8 in 1981 28 167.5



Lowest total winter rainfall for at least 20 years
Total rainfall
for winter 2010 (mm)
Most recent winter
this low or lower
Years since
lower
Average for
winter
Glenmaggie Weir 53.2 31.0 in 1982 28 124.7



Lowest winter mean daily maximum temperature for at least 20 years
Mean daily maximum
temperature
for winter 2010 (C)
Most recent winter
this low or lower
Years since
lower
Average for
winter
Strathbogie 10.3 9.9 in 1981 25 11.0
Mangalore Airport 12.7 12.4 in 1989 21 13.3
Mildura Airport 15.4 14.3 in 1989 21 16.2
Ouyen (Post Office) 15.0 14.2 in 1989 21 16.0
Walpeup Research 14.8 13.6 in 1989 21 15.4
Hamilton Airport 12.1 11.7 in 1989 20 12.8
Longerenong 13.3 12.7 in 1989 20 13.9



Summary statistics for winter 2010
Maximum temperatures
for winter
(C)
Minimum temperatures
for winter
(C)
Rainfall
for winter
(millimetres)
Mean for
winter
2010
Diff
from
average
Highest for
winter
2010
Mean for
winter
2010
Diff
from
average
Lowest for
winter
2010
Total for
winter
2010
Average
for
winter
Rank of
winter
2010
Fraction of
winter
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 13.4 -0.6 18.4 4 Jun 3.0 -0.5 -2.0 14 Jun 193.8 193.4 average 100%
Hume Reservoir 13.4 +0.3 18.7 4 Jun 4.5 0.0 0.2 14 Jun 216.8 220.8 average 98%
North Mallee (district 76)
Mildura Airport 15.4 -0.8 21.5 31 Aug 4.9 0.0 -1.3 17 Aug 69.4 75.5 average 92%
Ouyen (Post Office) 15.0 -1.0 20.0 31 Aug 4.7 -0.1 -0.5 17 Aug 81.7 93.4 average 87%
Walpeup Research 14.8 -0.6 19.6 30 Aug 5.0 -0.2 -0.9 6 Jul 99.0 97.5 average 102%
South Mallee (district 77)
Hopetoun Airport 14.8   19.3 30 Jul 3.3   -3.3 25 Jul 100.4
Swan Hill Aerodrome 14.4 -1.2 18.1 24 Jun 4.0 +0.1 -1.7 9 Jul 104.4 86.6 average 121%
North Wimmera (district 78)
Nhill Aerodrome 13.9   18.3 30 Aug 4.1   -2.7 27 Jun 121.2
Warracknabeal Museum 14.0 -0.8 18.2 30 Aug 4.0 -0.2 -1.2 17 Aug 151.3 122.7 high 123%
South Wimmera (district 79)
Edenhope Airport 13.2   17.0 30 Aug 4.3   -1.9 27 Jun 208.4
Grampians (Mount William) 4.6   11.1 23 Jul 0.8   -2.2 25 Aug 543.6
Horsham Aerodrome 13.4 -1.1 17.8 30 Aug 3.3 0.0 -2.2 17 Aug 145.6 118.4 high 123%
Horsham Polkemmet Rd 13.5 -0.6 18.4 30 Aug 3.5 -0.7 -2.2 17 Aug 166.8 145.1 high 115%
Kanagulk 12.8   17.2 30 Aug 3.7   -2.4 27 Jun 200.0
Longerenong 13.3 -0.6 17.5 30 Aug 3.4 -0.4 -2.9 27 Jun 150.8 131.6 average 115%
Pyrenees (Ben Nevis) 6.6   11.1 30 Aug 2.3   -1.7 25 Aug 329.4
Stawell Aerodrome 12.5 -0.8 16.7 30 Aug 3.9 -0.5 -1.5 15 Jun 221.4 169.2 high 131%
Lower North (district 80)
Charlton 14.0   17.5 1 Jun 3.8   -2.2 28 Jun 152.6
Echuca Aerodrome 13.8 -0.5 18.5 1 Jun 3.7 -0.7 -1.6 27 Jul 170.4 125.8 high 135%
Kerang 14.5 -0.4 18.5 1 Jun 4.3 -0.2 -0.7 4 Jul 148.9 108.3 high 137%
Kyabram DPI 13.7 -0.2 18.0 1 Jun 3.5 0.0 -2.5 27 Jul 150.2 126.7 high 119%
Upper North (district 81)
Bendigo Airport 12.8 -0.5 17.1 2 Jun 3.1 +0.3 -4.0 28 Jun 285.8 155.4 v high 184%
Shepparton Airport 13.1 -1.2 17.8 2 Jun 3.4 -0.1 -2.5 28 Jun 152.6 125.0 average 122%
Tatura Inst Sustainable Ag 13.2 -0.7 17.4 1 Jun 3.0 -0.5 -2.9 20 Jul 157.0 138.3 average 114%
Lower Northeast (district 82)
Benalla Airport 13.3   18.5 3 Jun 2.6   -3.4 14 Jun 223.3
Corryong Airport 11.7   16.5 3 Aug 0.8   -5.7 14 Jun 301.2
Dartmouth Reservoir 12.1 -0.5 16.0 4 Jun 2.0 -0.6 -2.2 14 Jun 313.4 341.8 average 92%
Hunters Hill 7.8 -0.4 14.7 4 Jun 2.1 -0.4 -1.8 17 Aug 444.6 425.4 average 105%
Rutherglen Research 13.4 +0.2 18.3 3 Jun 2.0 -0.5 -3.8 13 Jun 173.4 180.6 average 96%
Strathbogie 10.3 -0.7 15.9 3 Jun 1.3 -0.8 -5.0 28 Jun 400.4 355.2 high 113%
Wangaratta Aero 13.2 -0.6 18.4 3 Jun 2.5 -0.3 -3.8 14 Jun 200.8 196.0 average 102%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 6.3   13.1 4 Jun -2.1   -8.2 20 Jul 204.8 209.8 average 98%
Edi Upper 12.5 -0.3 18.2 2 Jun 3.2 -0.8 -1.0 28 Jun 406.4 365.1 average 111%
Falls Creek 1.3 -0.7 8.9 4 Jun -3.1 -0.7 -7.3 25 Aug 322.6 289.6 average 111%
Mount Hotham 0.0 -0.7 6.5 3 Jun -3.9 -0.8 -7.6 25 Aug 501.2 377.2 average 133%
Omeo 10.6   15.1 4 Jun 0.3   -4.9 15 Jun 149.8
East Gippsland (district 84)
Combienbar AWS 11.4 -0.5 16.6 30 Jul 4.8 -0.5 1.8 10 Jun 132.8 219.3 v low 61%
Gabo Island Lighthouse 14.9 +0.4 21.4 19 Aug 8.5 -0.2 4.3 29 Jun 150.0 260.2 low 58%
Gelantipy 9.5 -0.8 14.0 29 Jul 2.2 -0.5 -2.5 28 Jun 209.8 155.2 high 135%
Lakes Entrance (Eastern Beach Road) 15.0   20.5 30 Jul 6.1   -0.6 8 Aug 131.6
Mallacoota 15.0 -0.4 20.9 19 Aug 6.1 -0.6 0.9 29 Jun 171.4 231.2 average 74%
Mount Nowa Nowa 12.9 -0.8 18.3 29 Jul 5.8 -0.7 2.3 28 Jun 180.8 188.9 average 96%
Orbost 14.8   19.5 17 Jun 5.4   0.9 18 Jul 153.4 189.7 average 81%
Orbost (Comparison) 15.3 -0.1 20.1 17 Jun 4.0 -0.7 -1.0 18 Jul 165.7 210.6 average 79%
Point Hicks (Lighthouse) 14.5 -0.1 19.0 19 Aug 8.2 -0.4 4.0 8 Aug 288.9 281.9 average 102%
West Gippsland (district 85)
Bairnsdale Airport 14.5 -0.6 20.0 30 Jul 4.2 -0.2 -1.2 9 Jul 103.0 146.3 average 70%
East Sale Airport 14.2 -0.1 19.0 30 Jul 2.9 -1.0 -1.9 28 Jun 85.0 133.1 low 64%
Morwell (Latrobe Valley Airport) 13.7 -0.5 18.1 30 Jul 3.6 -0.5 -3.1 20 Jul 157.2 187.2 low 84%
Mount Baw Baw 1.4 -1.7 7.4 4 Jun -2.1 -1.1 -5.9 28 Jun 520.2
Mount Moornapa 12.0 -0.7 18.0 30 Jul 5.2 -0.5 1.8 20 Jul
Noojee (Slivar) 12.2 -0.5 17.0 23 Jun 3.5 0.0 -1.5 9 Aug 324.2 316.0 average 103%
Pound Creek 13.8   17.9 24 Jun 6.0   -0.3 16 Jun 288.0
Wilsons Promontory Lighthouse 12.7 0.0 15.8 24 Jun 9.4 +0.7 4.5 25 Aug 417.6 362.0 high 115%
Yarram Airport 14.3   18.3 30 Jul 4.0   -2.1 20 Jul 138.6
East Central (district 86)
Bundoora (Latrobe University) 13.4 -0.6 17.5 24 Jun 5.9 0.0 0.1 9 Jul 179.9 162.3 average 111%
Cerberus 13.6 -0.5 17.5 24 Jun 6.4 -0.2 -0.3 16 Jun 270.6 224.3 high 121%
Coldstream 13.2 -0.8 17.9 2 Jun 4.0 0.0 -3.2 9 Jul 247.2 193.2 high 128%
Coldstream Comparison 13.1   17.7 2 Jun 3.9   -3.3 9 Jul 247.2
Cranbourne Botanic Gardens 13.4 -0.5 17.3 24 Jun     1.9 9 Jul 223.1 224.2 average 100%
Essendon Airport 13.6 0.0 17.3 1 Jun 5.8 +0.3 0.2 9 Jul 147.2 132.1 average 111%
Ferny Creek (Dunns Hill) 8.7 -1.0 12.7 24 Jun 4.8 -0.5 0.3 25 Aug 345.6 264.5 high 131%
Frankston AWS 12.9 -0.4 17.2 24 Jun 8.1 -0.2 4.1 6 Jul
Melbourne Airport 13.4 -0.3 17.4 30 Jul 5.6 -0.2 1.4 22 Jun 137.2 120.8 average 114%
Melbourne Regional Office 14.6 +0.5 18.6 30 Aug 7.5 +1.0 3.2 20 Jul 157.2 146.9 average 107%
Moorabbin Airport 13.7 -0.5 17.8 24 Jun 6.4 -0.1 0.5 22 Jun 181.0 185.4 average 98%
Rhyll 13.6 -0.2 18.5 2 Jun 8.3 -0.1 5.5 25 Aug 259.8 201.0 high 129%
Scoresby Research Institute 13.3 -0.2 16.9 1 Jun 5.8 -0.3 0.2 22 Jun 221.2 225.1 average 98%
Viewbank (ARPANSA) 13.6 -1.0 17.3 1 Jun 5.7 -0.5 0.0 20 Jul 204.8 158.7 v high 129%
Wallan (Kilmore Gap) 9.0 -0.8 12.6 30 Aug 4.2 -0.1 -0.3 25 Aug 289.8 187.7 v high 154%
Wonthaggi 14.0 -0.1 18.2 24 Jun 6.4 -0.1 1.9 6 Jul 340.4 297.5 average 114%
West Central (district 87)
Avalon Airport 14.1 -0.7 18.6 30 Jul 5.2 -0.2 -1.1 16 Jun 116.8 118.8 average 98%
Grovedale (Geelong Airport) 13.6 -0.9 17.6 30 Jul 5.7 -0.1 -0.4 16 Jun 148.0 139.7 average 106%
Laverton RAAF 14.0 -0.2 18.0 30 Jul 5.6 +0.2 0.6 22 Jun 119.0 122.7 average 97%
Sheoaks 12.2 -0.6 16.7 24 Jun 4.7 -0.6 -1.1 16 Jun 128.4 119.4 average 108%
North Central (district 88)
Castlemaine Prison 11.9 -0.7 16.6 2 Jun 2.7 -0.5 -2.9 6 Jul 239.6 186.3 high 129%
Eildon Fire Tower 9.2 -0.8 14.3 2 Jun 3.7 -0.7 -0.3 20 Jul 253.6 210.2 average 121%
Lake Eildon 12.3 -0.4 17.1 2 Jun 3.8 -0.2 -1.1 14 Jun 328.1 286.6 high 114%
Mangalore Airport 12.7 -0.6 17.7 2 Jun 3.2 -0.5 -3.4 28 Jun 207.2 175.9 high 118%
Maryborough 12.6 -0.4 16.7 4 Jun 3.8 0.0 -2.2 28 Jun 227.2 166.5 high 136%
Redesdale 12.2 -0.5 17.0 2 Jun 2.7 -0.6 -3.6 28 Jun 284.2 186.7 v high 152%
Western Plains (district 89)
Ararat Prison 11.9 -0.4 15.5 30 Aug 3.3 -0.3 -3.0 27 Jul 254.6 187.9 v high 135%
Ballarat Aerodrome 10.4 -0.3 14.3 3 Jun 2.9 -0.7 -2.8 9 Jul 259.6 204.7 high 127%
Westmere 12.3   16.1 30 Aug 3.9   -2.9 15 Jun 208.6
West Coast (district 90)
Aireys Inlet 13.2 -0.7 16.8 30 Jul 7.1 -0.5 3.8 25 Aug 233.0 189.1 high 123%
Cape Nelson Lighthouse 13.9 -0.2 17.6 30 Jul 8.3 -0.3 3.5 16 Jun 281.6 281.7 average 100%
Cape Otway Lighthouse 13.0 -0.5 17.3 13 Jul 8.2 +0.3 4.5 16 Jun 362.0 306.0 high 118%
Casterton 13.1   17.3 30 Aug 4.3   -1.9 27 Jun 252.0
Casterton Showgrounds 13.6 -0.5 17.4 30 Aug 4.3 -1.0 -3.0 27 Jun 250.4 238.9 average 105%
Colac (Mount Gellibrand) 11.3   15.2 24 Jun 5.1   1.4 25 Aug 197.8 171.3 high 115%
Dartmoor 13.6   17.2 30 Aug 5.0   -0.9 6 Jul 294.2
Hamilton Airport 12.1 -0.7 15.8 30 Aug 3.8 -0.9 -1.4 27 Jun 228.0 213.9 average 107%
Mortlake Racecourse 13.0 -0.4 16.8 30 Jul 4.3 -0.5 -1.4 27 Jul 259.0 176.6 high 147%
Port Fairy AWS 14.1 -0.6 18.2 24 Jun 6.3 -1.0 1.6 16 Jun 292.8 251.8 average 116%
Portland (Cashmore Airport) 13.2 -0.4 16.7 30 Jul 6.1 -0.5 1.1 16 Jun 402.4 318.8 high 126%
Warrnambool Airport NDB 13.4 -0.7 16.9 4 Jun 5.2 -0.5 -0.4 6 Jul 314.0 250.8 v high 125%
Weeaproinah 9.4 -0.1 13.8 3 Jun 4.7 -0.2 0.8 20 Aug 957.4 672.5 v high 142%

Notes

A Seasonal Climate Summary is prepared to list 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. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.

This statement has been prepared based on information available at 11 am on Wednesday 1 September 2010. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages 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.

Further information

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Enquiries