Victoria in winter 2011: Record breaking warmth

  • 2nd warmest average maximum temperatures on record
  • Average night-time temperatures warmer than usual in parts of the state
  • Above average rainfall in Gippsland.

Rainfall

Rainfall totals were close to average in the South West and West & South Gippsland forecast districts. Winter rainfall over East Gippsland was above average. Rainfall totals for winter across the rest of the state were below average except for parts of the Central forecast district where they were very much drier than usual. The wettest station overall was Falls Creek (Rocky Valley) with 653.5 mm and the wettest single day was the 11th of August when Reeves Knob recorded 137.4 mm. Melbourne Airport observed their lowest total winter rainfall on record.  There is a map of rainfall deciles below.

Temperature

Maximum temperature

Preliminary data indicates that Victoria has recorded its 2nd warmest average maximum temperatures for winter in 2011. Average maximum temperatures were very much warmer than usual in parts on the north and north-west of the state. Elsewhere average daytime temperatures were warmer than normal except for East Gippsland where they were more typical for winter. The hottest day was the 4th of August when Mildura Airport recorded 27.9 C and the warmest days on average were also recorded at Mildura Airport with 17.5 C. Mount Hotham recorded the coolest days on average with 1.0 C as well as the coldest day of the season on the 7th of June with -4.1 C. Some stations had their highest winter temperature on record and others their highest winter mean daily maximum temperature on record. There is a map of maximum temperature anomalies below.

Minimum temperature

Average minimum temperatures across the state were generally close to normal for winter. Most stations reported average minimum temperatures within 0.5 C of their long-term means. The exception was parts of the South West forecast district where average night-time temperatures were warmer than usual. The coldest night was the 27th of August when Mount Buller recorded -7.7 C. The coolest nights on average were recorded at Mount Hotham with -2.8 C. Wilsons Promontory Lighthouse recorded the warmest nights on average with 9.8 C and the warmest night for the season was the 5th of August when Point Hicks (Lighthouse) recorded 17.5 C. Some sites had their warmest winter night (highest daily minimum temperature) on record. There is a map of minimum temperature anomalies below.

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Extremes in winter 2011
Hottest day 27.9 C at Mildura Airport on 4 Aug
Warmest days on average 17.5 C at Mildura Airport
Coolest days on average 1.0 C at Mount Hotham
Coldest day -4.1 C at Mount Hotham on 7 Jun
Coldest night -7.7 C at Mount Buller on 27 Aug
Coolest nights on average -2.8 C at Mount Hotham
Warmest nights on average 9.8 C at Wilsons Promontory Lighthouse
Warmest night 17.5 C at Point Hicks (Lighthouse) on 5 Aug
Warmest on average overall 12.1 C at Cape Nelson Lighthouse
12.1 C at Gabo Island Lighthouse
12.1 C at Melbourne Regional Office
12.1 C at Point Hicks (Lighthouse)
Coolest on average overall -0.9 C at Mount Hotham
Wettest overall 653.5 mm at Falls Creek (Rocky Valley)
Wettest day 137.4 mm at Reeves Knob on 11 Aug
Highest wind gust 146 km/h at Wilsons Promontory Lighthouse on 5 Jul

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 lowest total winter rainfall
Total rainfall
for winter 2011 (mm)
Previous driest
for winter
Years of
record
Average for
winter
Melbourne Airport 58.0 59.6 in 1982 40 119.3



Record highest winter temperature
Highest temperature
in winter 2011 (C)
Previous warmest
for winter
Years of
record
Average for
winter
Edi Upper 21.8 on 4 Aug 21.4 on 29 Aug 1999 24 12.8



Record highest winter mean daily maximum temperature
Mean daily maximum
temperature
for winter 2011 (C)
Previous warmest
for winter
Years of
record
Average for
winter
Melbourne Regional Office 15.9 = 15.9 in 2005 156 14.2
Kerang 16.6 16.5 in 2002 99 14.9
Hume Reservoir 14.6 = 14.6 in 2006 78 13.1
Scoresby Research Institute 14.8 = 14.8 in 2005 53 13.5
Ararat Prison 13.6 13.5 in 2005 42 12.3
Melbourne Airport 14.8 = 14.8 in 2005 40 13.7
Warracknabeal Museum 15.9 = 15.9 in 1982 38 14.7
Portland (Cashmore Airport) 14.4 = 14.4 in 2005 29 13.6



Record highest winter daily minimum temperature
Highest daily minimum
temperature
in winter 2011 (C)
Previous warmest
for winter
Years of
record
Average for
winter
Laverton RAAF 15.1 on 4 Aug 14.9 on 26 Aug 2004 68 5.4
Point Hicks (Lighthouse) 17.5 on 5 Aug 15.8 on 3 Jun 2003 44 8.6
Essendon Airport 14.7 on 4 Aug 14.2 on 31 Aug 2007 43 5.5


Summary statistics for winter 2011
Maximum temperatures
for winter
(C)
Minimum temperatures
for winter
(C)
Rainfall
for winter
(millimetres)
Mean for
winter
2011
Diff
from
average
Highest for
winter
2011
Mean for
winter
2011
Diff
from
average
Lowest for
winter
2011
Total for
winter
2011
Average
for
winter
Rank of
winter
2011
Fraction of
winter
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 14.6 +0.6 22.9 4 Aug 3.3 -0.2 -1.6 15 Jul 177.0 192.5 average 92%
Hume Reservoir 14.6 +1.5 23.5 4 Aug 5.0 +0.5 -0.6 11 Jun 182.2 220.4 average 83%
North Mallee (district 76)
Mildura Airport 17.5 +1.3 27.9 4 Aug 5.1 +0.2 -0.9 8 Jul 45.8 75.0 low 61%
Ouyen (Post Office) 16.7 +0.7 27.5 3 Aug 5.4 +0.6 0.1 23 Jul 73.2 93.2 average 79%
Walpeup Research 16.6 +1.3 26.6 3 Aug 5.8 +0.6 0.0 9 Jun 78.2 97.2 average 80%
South Mallee (district 77)
Hopetoun Airport 16.7   26.3 3 Aug 4.0   -4.5 27 Jul 64.6
Swan Hill Aerodrome 16.7 +1.2 27.2 4 Aug 4.1 +0.1 -2.9 27 Jul 64.0 84.8 average 75%
North Wimmera (district 78)
Nhill Aerodrome 15.7   25.0 3 Aug 4.9   -0.8 22 Jul 98.8
Warracknabeal Museum 15.9 +1.2 24.5 3 Aug 4.7 +0.5 -1.5 27 Jul 89.0 121.9 low 73%
South Wimmera (district 79)
Edenhope Airport 14.7   24.1 3 Aug 5.8   -1.0 15 Jun 198.6
Grampians (Mount William) 6.3   14.3 3 Aug 1.8   -2.2 8 Jun 422.6
Horsham Aerodrome 15.1 +0.7 23.2 3 Aug 3.5 +0.2 -2.7 15 Jun 100.8 117.1 low 86%
Horsham Polkemmet Rd 15.2 +1.1 23.3 3 Aug 4.2 +0.1 -3.5 15 Jun 111.4 144.9 low 77%
Kanagulk 14.1   21.9 3 Aug 4.9   -1.2 1 Jun 185.6
Longerenong 15.0 +1.1 22.5 3 Aug 4.0 +0.2 -1.7 1 Jun 117.4 131.5 average 89%
Pyrenees (Ben Nevis) 8.5   16.4 3 Aug 3.4   -1.5 24 Jul 218.6
Stawell Aerodrome 13.7 +0.4 21.2 3 Aug 5.1 +0.7 -0.8 1 Jun 120.0 166.1 low 72%
Lower North (district 80)
Charlton 15.8   25.1 3 Aug 4.6   -1.7 27 Jul 95.6
Echuca Aerodrome 15.9 +1.6 26.3 4 Aug 3.3 -1.1 -1.9 15 Jul 125.6 125.8 average 100%
Kerang 16.6 +1.7 27.0 3 Aug 4.8 +0.3 -0.4 27 Jul 92.2 108.3 average 85%
Kyabram DPI 15.5 +1.6 25.6 4 Aug 3.8 +0.3 -2.1 27 Jul 119.6 126.6 average 94%
Upper North (district 81)
Bendigo Airport 14.4 +1.1 21.9 3 Aug 3.3 +0.4 -3.1 27 Jul 146.6 155.0 average 95%
Shepparton Airport 14.9 +0.7 24.8 4 Aug 3.4 -0.1 -2.8 15 Jul 122.6 124.8 average 98%
Tatura Inst Sustainable Ag 15.0 +1.1 25.1 4 Aug 3.6 +0.1 -2.6 15 Jul 127.6 138.2 average 92%
Yarrawonga 15.4 +0.9 25.2 4 Aug 3.8 0.0 -1.8 11 Jun 109.4 127.6 average 86%
Lower Northeast (district 82)
Benalla Airport 14.9   23.1 4 Aug 3.4   -1.8 15 Jul 170.3
Corryong Airport 12.8   20.3 5 Aug 1.1   -5.0 15 Jul 215.6
Dartmouth Reservoir 13.0 +0.4 20.4 4 Aug 3.2 +0.6 -2.4 29 Jul 266.2 340.5 low 78%
Hunters Hill 9.0 +0.9 16.4 3 Aug 2.9 +0.4 -2.1 8 Jun 369.8 422.3 low 88%
Rutherglen Research 14.7 +1.5 22.4 4 Aug 2.0 -0.5 -4.2 15 Jul 155.8 180.4 average 86%
Strathbogie 11.8 +0.8 19.7 4 Aug 2.2 +0.2 -4.0 16 Jul 274.2 354.5 low 77%
Wangaratta Aero 14.7 +0.9 22.5 4 Aug 2.7 -0.1 -3.6 11 Jun 172.2 195.0 average 88%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 7.8 +0.6 17.7 23 Aug -1.2 0.0 -7.0 15 Jul 203.8 209.3 average 97%
Edi Upper 13.8 +1.0 21.8 4 Aug 3.8 -0.2 -0.8 15 Jul 336.3 363.9 average 92%
Falls Creek 2.4 +0.4 11.0 22 Aug -1.9 +0.5 -6.6 8 Jun 240.8 286.7 low 84%
Mount Buller 2.2 0.0 9.3 23 Aug -2.3 -0.2 -7.7 27 Aug 440.8 483.1 average 91%
Mount Hotham 1.0 +0.4 10.1 22 Aug -2.8 +0.3 -7.3 8 Jun 344.4 375.3 average 92%
Omeo 11.8   19.0 3 Aug 0.5   -5.3 16 Jul 168.0
East Gippsland (district 84)
Combienbar AWS 12.3 +0.4 21.7 3 Aug 5.8 +0.5 0.7 8 Jul 359.2 228.0 high 158%
Gabo Island Lighthouse 15.3 +0.8 24.4 5 Aug 8.9 +0.2 5.1 10 Jul 235.9 260.0 average 91%
Gelantipy 10.3 0.0 19.5 3 Aug 2.9 +0.2 -2.2 8 Jul 429.8 170.4 v high 252%
Lakes Entrance (Eastern Beach Road) 15.6   25.2 4 Aug     -1.3 16 Jul 242.6
Mallacoota 15.5 +0.2 26.2 4 Aug 6.9 +0.3 0.4 10 Jul 287.2 232.8 high 123%
Mount Nowa Nowa 13.6 0.0 23.2 3 Aug 6.6 +0.2 2.5 8 Jul 429.0 203.9 high 210%
Orbost 15.4 -0.2 25.2 4 Aug 6.3 +0.2 -0.5 16 Jul 366.8 205.8 high 178%
Orbost (Comparison) 15.7 +0.3 25.2 4 Aug 5.1 +0.4 -1.8 16 Jul 360.0 211.7 v high 170%
Point Hicks (Lighthouse) 15.2 +0.6 26.0 4 Aug 9.1 +0.5 4.5 7 Jul 353.6 283.4 high 125%
West Gippsland (district 85)
Bairnsdale Airport 15.5 +0.5 25.5 4 Aug 4.2 -0.1 -3.4 16 Jul 177.6 147.4 high 120%
East Sale Airport 15.0 +0.7 25.0 4 Aug 4.0 +0.2 -3.6 16 Jul 140.2 133.2 average 105%
Morwell (Latrobe Valley Airport) 14.8 +0.6 24.5 4 Aug 4.3 +0.2 -2.4 16 Jul 173.8 186.7 average 93%
Mount Baw Baw 3.1 +0.1 11.1 23 Aug -1.0 +0.1 -5.6 15 Jul 513.0 426.7 average 120%
Mount Moornapa 12.8 +0.1 22.6 4 Aug 6.0 +0.4 0.9 8 Jul 332.2 202.7 high 164%
Noojee (Slivar) 13.6 +0.9 21.5 3 Aug 4.2 +0.7 -0.9 16 Jul 279.2 314.7 low 89%
Pound Creek 14.6   22.5 3 Aug 6.0   -1.0 15 Jun 230.2
Wilsons Promontory Lighthouse 13.6 +0.9 23.5 3 Aug 9.8 +1.1 5.8 8 Jun 300.6 361.5 low 83%
Yarram Airport 15.0   24.3 4 Aug 4.3   -2.9 16 Jul 177.4
East Central (district 86)
Bundoora (Latrobe University) 14.8 +0.8 22.1 3 Aug 6.2 +0.3 -0.1 16 Jul 105.0 160.5 low 65%
Cerberus 14.6 +0.5 22.8 3 Aug 6.6 +0.1 -1.0 16 Jul 152.0 220.7 low 69%
Coldstream 14.7 +0.7 22.3 3 Aug 4.2 +0.2 -2.1 16 Jun 198.2 193.5 average 102%
Coldstream Comparison 14.6   22.3 3 Aug 4.1   -2.2 16 Jun 196.4
Cranbourne Botanic Gardens 14.5 +0.6 23.1 3 Aug 6.4 +0.1 0.0 16 Jul 163.3 223.3 low 73%
Essendon Airport 14.9 +1.3 22.0 3 Aug 6.4 +0.9 -1.1 16 Jul 65.4 131.1 v low 50%
Ferny Creek 10.9   18.6 3 Aug 6.0   0.6 8 Jun 264.8
Frankston AWS 14.2 +0.9 22.3 3 Aug 8.8 +0.5 3.6 23 Jul
Melbourne Airport 14.8 +1.1 21.2 4 Aug 6.2 +0.4 0.1 16 Jul 58.0 119.3 lowest 49%
Melbourne Regional Office 15.9 +1.7 23.2 3 Aug 8.2 +1.7 2.7 27 Jul 87.0 146.6 v low 59%
Moorabbin Airport 15.0 +0.8 23.2 3 Aug 6.8 +0.3 -0.9 16 Jul 117.0 184.3 v low 63%
Rhyll 14.2 +0.4 20.3 3 Aug 8.7 +0.3 4.2 16 Jul 171.0 199.3 average 86%
Scoresby Research Institute 14.8 +1.3 22.2 3 Aug 6.4 +0.3 -0.6 16 Jul 134.8 223.5 v low 60%
Viewbank (ARPANSA) 15.0 +0.5 22.2 3 Aug 6.1 0.0 -0.2 16 Jul 130.4 156.4 low 83%
Wallan (Kilmore Gap) 10.6 +0.9 16.9 4 Aug 4.8 +0.5 1.0 8 Jun 151.2 185.6 low 81%
Wonthaggi 14.8 +0.7 23.0 3 Aug 6.9 +0.4 1.5 16 Jul 242.4 296.9 low 82%
West Central (district 87)
Avalon Airport 15.3 +0.6 23.3 3 Aug 5.3 -0.1 -2.1 16 Jul 81.8 117.5 low 70%
Breakwater (Geelong Racecourse) 15.2   22.8 3 Aug 6.6   -0.6 16 Jul 89.2
Laverton RAAF 15.2 +1.0 22.3 25 Aug 6.0 +0.6 -1.8 16 Jul 58.8 121.8 v low 48%
Sheoaks 13.5 +0.7 21.4 3 Aug 5.5 +0.2 -2.3 16 Jul 81.6 117.3 low 70%
North Central (district 88)
Castlemaine Prison 13.2 +0.6 20.3 3 Aug 4.0 +0.8 -2.4 30 Aug 137.8 185.2 low 74%
Eildon Fire Tower 10.7 +0.8 18.8 4 Aug 4.6 +0.3 0.1 8 Jun 192.2 209.0 average 92%
Lake Eildon 13.7 +1.0 22.3 4 Aug 4.1 +0.2 -0.8 15 Jul 246.4 286.3 average 86%
Mangalore Airport 14.4 +1.1 22.4 4 Aug 3.6 -0.1 -3.0 8 Jun 122.2 174.9 low 70%
Maryborough 14.3 +1.3 22.6 3 Aug 4.0 +0.2 -1.2 27 Jul 126.4 166.2 low 76%
Redesdale 13.8 +1.2 19.9 25 Aug 3.2 -0.1 -2.5 28 Jul 141.2 186.3 low 76%
Western Plains (district 89)
Ararat Prison 13.6 +1.3 21.7 3 Aug 4.6 +1.0 -2.6 1 Jun 133.7 186.6 low 72%
Ballarat Aerodrome 11.7 +1.0 18.6 3 Aug 3.9 +0.3 -2.9 1 Jun 137.4 204.1 low 67%
Westmere 13.3   20.2 3 Aug 5.1   -1.6 16 Jul 102.4
West Coast (district 90)
Aireys Inlet 14.1 +0.3 22.8 3 Aug 7.9 +0.3 3.7 16 Jul 172.6 188.2 low 92%
Cape Nelson Lighthouse 14.8 +0.7 23.5 3 Aug 9.3 +0.7 3.4 16 Jul 275.2 281.3 average 98%
Cape Otway Lighthouse 14.2 +0.7 21.7 3 Aug 9.2 +1.3 4.7 8 Aug 226.4 305.5 low 74%
Casterton 14.1   22.5 3 Aug 5.6   -1.1 15 Jul 265.6
Colac (Mount Gellibrand) 12.8 +0.7 20.5 3 Aug 6.0 +0.4 2.1 7 Jul 163.8 170.6 low 96%
Dartmoor 14.6   23.1 3 Aug 6.0   -0.9 1 Jun 334.2
Hamilton Airport 13.4 +0.6 20.7 3 Aug 5.0 +0.3 -0.5 6 Jun 202.2 213.5 average 95%
Mortlake Racecourse 14.3 +0.9 21.5 3 Aug 5.2 +0.5 -1.5 1 Jun 159.4 175.7 average 91%
Port Fairy AWS 15.2 +0.6 22.6 3 Aug 7.9 +0.7 2.2 1 Jun 280.6 253.4 average 111%
Portland (Cashmore Airport) 14.4 +0.8 22.6 3 Aug 7.5 +0.9 1.0 16 Jul 323.2 319.1 average 101%
Portland NTC AWS 14.5   21.0 3 Aug 9.0   2.9 1 Jun
Warrnambool Airport NDB 14.5 +0.5 21.6 3 Aug 6.3 +0.7 -1.2 12 Aug 240.0 249.9 average 96%

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 10 am on Thursday 1 September 2011. 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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