Victoria in August 2010: Above average August

  • Sixth wettest August in Victoria
  • Exceptionally cold daytime temperatures
  • Bumper month for snow

Rainfall

A continuous succession of cold fronts passed across the Victorian region during August, resulting in above average rainfall state-wide. Over half the State recorded rainfall in the highest 10% of previous totals, with some locations in the Western district, specifically Weeaproinah, Cape Otway Lighthouse and Apollo Bay, all highest on record.

In fact, Weeaproinah experienced not only their wettest August on record, but also their wettest month on record, with a 628 mm soaking. This equates to almost one third of the usual annual rainfall at Weeaproinah and is more than double the average for August. Numerous locations across the State recorded rainfall of more than twice the average for August, particularly in the Western district and Northern Country.

Significant frontal systems passed across the State, bringing widespread rain and strong winds. A particularly strong low pressure system centred in Bass Strait on the 11th, progressed across the State in the late afternoon through to evening, causing widespread precipitation. This system was associated with the highest daily rainfall for the month with Weeaproinah recording 110.0 mm on the 12th. Substantial snowfalls in Alpine areas were recorded between the 24th and 27th, with snow reported down to low levels.

Temperature

Maximum temperature

Chilly days were experienced throughout Victoria with average maximum temperatures approximately 1.5C lower than that usually experienced in August. Frequent cloud cover associated with frontal systems prevented daytime heating of the atmosphere, which led to cool daytime temperatures, often remaining below 12C. In fact, several locations, including Strathbogie and Noojee, observed record low average daytime temperatures for the month.

The Alpine areas experienced icy days throughout August, Mount Hotham the coldest location this month, averaging just -1.3C. The 25th was the coldest day with Mount Hotham also recording the coldest maximum temperature, -4.7C and Mount Buller equalling its previous record coldest August day, reaching just -3.5C.

In contrast, the warmest days on average were observed at Mildura Airport, a mild 15.7C. More than half the State observed the warmest day on the 30th where sunny spring-like conditions raised temperatures over 18C. Yet surprisingly, the warmest days of the month were the 19th, with a pleasant 21.4C recorded at Gabo Island Lighthouse; whilst Mildura Airport reached 21.5C on the 31st.

Minimum temperature

Minimum temperatures were slightly below average this month, with persistent cloud cover moderating overnight cooling. The coolest nights across the State were the 7th, 8th and 25th, with particularly frosty conditions in the north and west recorded on the 17th. Across the south and east of the State, including the Alpine areas, freezing sub-zero overnight temperatures were recorded on the 25th, with Mount Hotham observing a very icy -7.6C.

The lighthouse stations experienced the warmest overnight temperatures again this month, averaging 8.4C at Cape Nelson Lighthouse and Wilsons Promontory Lighthouse, which was, surprisingly, even warmer than the average at the Melbourne Regional Office (7.6C).

Further information

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Extremes in August 2010
Hottest day 21.5 C at Mildura Airport on the 31st
Warmest days on average 15.7 C at Mildura Airport
Coolest days on average -1.2 C at Mount Hotham
Coldest day -4.7 C at Mount Hotham on the 25th
Coldest night -7.6 C at Mount Hotham on the 25th
Coolest nights on average -5.0 C at Mount Hotham
Warmest nights on average 8.4 C at Cape Nelson Lighthouse
8.4 C at Wilsons Promontory Lighthouse
Warmest night 12.0 C at Gabo Island Lighthouse on the 15th
Wettest overall 628.0 mm at Weeaproinah
Wettest day 110.0 mm at Weeaproinah on the 12th
Highest wind gust 148 km/h at Grampians (Mount William) on the 11th

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 August rainfall
Total rainfall
for August 2010 (mm)
Previous highest
for August
Years of
record
Average for
August
Cape Otway Lighthouse 221.2 206.0 in 2001 149 103.6
Wickliffe 155.2 137.8 in 1939 131 61.0
Beaufort 184.4 151.7 in 1909 120 73.6
Hawkesdale (Post Office) 169.2 165.1 in 1939 118 82.5
Cobden (Post Office) 238.6 231.6 in 1966 116 102.9
Terang 189.0 186.1 in 1966 114 93.0
Apollo Bay 292.4 276.2 in 1939 110 126.8
Weeaproinah 628.0 472.2 in 1939 110 235.4
Willaura (Main Street) 158.6 114.9 in 1955 106 58.5
Lismore (Post Office) 152.6 117.3 in 1951 91 68.8
Rosebud (Country Club) 129.8 128.9 in 1981 60 79.9
Derrinallum (Post Office) 186.0 119.8 in 1975 55 75.0
Caramut 165.5 141.9 in 1970 51 77.2
Charlton (Donald St) 99.8 98.6 in 1985 51 46.4
Donald 116.8 86.2 in 1985 44 42.8
Glenthompson 141.0 127.6 in 2001 43 71.1
Ararat Prison 151.2 135.4 in 1981 42 69.5
Warracknabeal Museum 102.0 96.2 in 1981 42 44.7
Avoca (Homebush) 124.6 115.0 in 1999 23 54.6

Highest total August rainfall for at least 20 years
Total rainfall
for August 2010 (mm)
Most recent August
this high or higher
Years since
higher
Average for
August
Ballarat Aerodrome 161.0 167.1 in 1909 101 75.3
St Arnaud (Coonooer Bridge) 123.4 125.3 in 1909 101 45.8
Rupanyup (Post Office) 106.2 155.1 in 1909 100 45.3
St Arnaud 124.4 146.9 in 1909 100 56.2
Mornington 130.0 152.9 in 1909 94 71.5
Dunolly 111.3 117.7 in 1920 89 52.8
Skipton Post Office 133.4 168.7 in 1939 70 64.6
Forrest State Forest 264.6 329.8 in 1951 59 129.8
Beeac (Post Office) 127.4 133.6 in 1951 57 69.1
Cressy 106.4 115.1 in 1951 54 54.0
Birregurra (Post Office) 142.0 156.5 in 1955 53 78.5
Daylesford 205.2 237.7 in 1958 52 103.3
Buchan 128.0 128.1 in 1968 42 59.6
Narraport 76.3 80.4 in 1968 42 35.6
Nullawarre 207.6 224.7 in 1970 40 106.5
Penshurst (Post Office) 155.2 169.1 in 1970 40 82.1
Colac (Shire Office) 164.2 169.4 in 1966 37 88.2
Raywood 104.4 105.6 in 1973 37 43.9
Echuca Aerodrome 102.8 115.3 in 1973 36 42.3
Yea 111.0 117.4 in 1975 33 64.5
Bonbeach (Carrum) 102.0 118.2 in 1978 30 67.1
Ballan 119.2 122.0 in 1981 29 70.2
Bannockburn 68.8 81.6 in 1981 29 46.5
Clunes 136.8 163.2 in 1981 29 64.6
Drung Drung 89.2 113.2 in 1981 29 50.1
Maryborough 114.4 133.8 in 1981 29 56.5
Castlemaine Prison 122.0 139.4 in 1981 28 67.7
Jeparit 77.0 103.0 in 1981 28 40.1
Beulah 81.4 87.9 in 1981 27 39.9
Elmore 104.2 108.6 in 1984 26 47.0
Yanac North 86.6 93.2 in 1984 26 45.3
Berriwillock 73.2 78.8 in 1985 25 34.5
Heathcote 102.4 126.4 in 1985 25 61.2
Kerang 85.0 119.0 in 1985 25 37.2
Korong Vale (Burnbank) 98.4 109.8 in 1985 25 45.4
Sea Lake (Post Office) 70.2 73.2 in 1985 25 32.3
Strath Creek 125.6 129.4 in 1985 25 73.0
Strathbogie 203.4 225.4 in 1985 25 116.6
Tubbut 90.8 101.4 in 1985 25 50.5
Warrenbayne 170.4 183.6 in 1985 25 103.3
Wedderburn (Post Office) 111.9 119.4 in 1985 25 50.5
Whitlands (Burder's Lane) 288.8 323.8 in 1985 25 175.2
Culgoa 65.8 66.2 in 1985 24 35.7
Ouyen (Post Office) 52.8 67.2 in 1986 24 32.8
Patchewollock 63.7 74.2 in 1986 24 36.0
Redesdale 120.2 129.6 in 1985 24 60.8
Inglewood (Post Office) 102.8 111.6 in 1985 23 48.4
Rushworth 97.8 124.0 in 1985 23 53.0
Walpeup Research 65.6 84.0 in 1985 23 35.2
Burrowye Station 169.4 176.6 in 1984 22 106.0
Avenel (Post Office) 95.6 117.6 in 1989 20 62.2
Cann River 114.0 =114.0 in 1990 20 64.2
Kyabram DPI 88.0 90.2 in 1989 20 43.0
Mangalore Airport 84.2 115.5 in 1989 20 62.9
Stanhope 82.2 95.0 in 1989 20 43.2



Lowest total August rainfall for at least 20 years
Total rainfall
for August 2010 (mm)
Most recent August
this low or lower
Years since
lower
Average for
August
Glenmaggie Weir 9.0 6.4 in 1982 28 42.1



Record lowest August daily maximum temperature
Lowest daily maximum
temperature
in August 2010 (C)
Previous lowest
for August
Years of
record
Average for
August
Strathbogie 5.4 on the 25th 5.7 on the 10th in 2005 33 11.6
Mount Buller -3.5 on the 25th = -3.5 on the 16th in 1991 24 2.2



Record lowest August mean daily maximum temperature
Mean daily maximum
temperature
for August 2010 (C)
Previous lowest
for August
Years of
record
Average for
August
Warracknabeal Museum 13.5 13.7 in 2008 37 15.6
Strathbogie 9.7 10.1 in 1992 32 11.6
Noojee (Slivar) 11.7 11.8 in 2008 26 13.4

Lowest August mean daily maximum temperature for at least 20 years
Mean daily maximum
temperature
for August 2010 (C)
Most recent August
this low or lower
Years since
lower
Average for
August
Horsham Polkemmet Rd 13.1 12.4 in 1943 57 15.0
Casterton Showgrounds 13.3 13.2 in 1958 48 14.7
Longerenong 12.9 =12.9 in 1989 21 14.8
Morwell (Latrobe Valley Airport) 13.5 13.4 in 1989 21 14.9
Bairnsdale Airport 14.7 14.6 in 1990 20 15.7
Moorabbin Airport 13.6 13.4 in 1989 20 14.9



Summary statistics for August 2010
Maximum temperatures
for August
(C)
Minimum temperatures
for August
(C)
Rainfall
for August
(millimetres)
Mean for
August
2010
Diff
from
average
Highest for
August
2010
Mean for
August
2010
Diff
from
average
Lowest for
August
2010
Total for
August
2010
Average
for
August
Rank of
August
2010
Fraction of
August
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 13.2 -1.8 16.0 10th 3.4 -0.2 -1.3 8th 100.4 66.1 high 152%
Hume Reservoir 13.3 -0.9 16.4 10th 4.6 -0.3 0.3 17th 104.8 76.5 high 137%
North Mallee (district 76)
Mildura Airport 15.7 -1.5 21.5 31st 5.2 0.0 -1.3 17th 29.2 26.2 average 111%
Ouyen (Post Office) 15.2 -1.8 20.0 31st 5.0 0.0 -0.5 17th 52.8 32.8 high 161%
Walpeup Research 14.8 -1.5 19.6 30th 5.2 -0.1 0.8 6th 65.6 35.2 v high 186%
South Mallee (district 77)
Hopetoun Airport 14.5   19.2 30th 4.0   -2.8 17th 66.4
Swan Hill Aerodrome 14.5 -2.3 17.9 31st 4.3 +0.4 -1.2 17th 50.2 28.8 high 174%
North Wimmera (district 78)
Nhill Aerodrome 13.5   18.3 30th 4.5   0.1 17th 73.2
Warracknabeal Museum 13.5 -2.1 18.2 30th 4.4 0.0 -1.2 17th 102.0 44.7 highest 228%
South Wimmera (district 79)
Edenhope Airport 12.8   17.0 30th 4.9   -0.5 17th 110.4
Grampians (Mount William) 4.1   9.3 30th 0.1   -2.2 25th 312.0
Horsham Aerodrome 13.0 -2.4 17.8 30th 3.3 +0.2 -2.2 17th 73.8 40.5 high 182%
Horsham Polkemmet Rd 13.1 -1.9 18.4 30th 3.7 -0.6 -2.2 17th 75.8 48.6 high 156%
Kanagulk 12.5   17.2 30th 4.2   -1.6 17th 98.8
Longerenong 12.9 -1.9 17.5 30th 3.6 -0.4 -2.9 17th 76.2 43.9 v high 174%
Pyrenees (Ben Nevis) 6.1   11.1 30th 1.2   -1.7 25th 192.2
Stawell Aerodrome 12.2 -2.0 16.7 30th 4.0 -0.6 -0.5 17th 122.2 56.9 v high 215%
Lower North (district 80)
Charlton 13.8   17.2 30th 4.1   -1.9 17th 99.8
Echuca Aerodrome 13.8 -1.5 16.2 30th 4.5 -0.2 -1.1 17th 102.8 42.3 v high 243%
Kerang 14.7 -1.4 17.4 31st 4.6 -0.3 -0.4 17th 85.0 37.2 v high 228%
Kyabram DPI 13.8 -1.1 16.6 30th 4.1 +0.3 -1.5 17th 88.0 43.0 v high 205%
Upper North (district 81)
Bendigo Airport 12.7 -1.6 15.6 30th 3.4 +0.9 -2.4 17th 139.0 51.1 v high 272%
Shepparton Airport 13.0 -2.1 15.4 30th 4.0 +0.4 -1.0 17th 77.8 47.1 high 165%
Tatura Inst Sustainable Ag 13.1 -1.6 16.0 30th 3.8 -0.1 -1.6 17th 85.6 47.2 v high 181%
Yarrawonga 13.4 -2.0 15.8 29th 3.8 +0.1 -0.7 17th 90.4 39.7 v high 228%
Lower Northeast (district 82)
Benalla Airport 12.8   15.7 13th 3.3   -1.4 7th 118.4
Corryong Airport 12.5   16.5 3rd 2.1   -3.7 7th 182.4
Dartmouth Reservoir 11.8 -1.7 15.5 30th 2.8 +0.1 -2.2 8th 156.0 125.5 average 124%
Hunters Hill 6.7 -2.3 11.5 13th 1.1 -1.6 -1.8 17th 217.8 139.1 high 157%
Rutherglen Research 13.1 -0.9 15.3 13th 2.4 -0.4 -2.3 17th 81.2 60.7 high 134%
Strathbogie 9.7 -1.9 12.9 13th 2.0 -0.3 -2.8 7th 203.4 116.6 v high 174%
Wangaratta Aero 12.9 -1.6 15.3 30th 3.2 +0.3 -1.7 17th 102.8 58.7 high 175%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 5.4   10.3 13th -2.0   -5.7 7th 105.8 80.3 average 132%
Edi Upper 11.7 -1.6 15.2 4th 3.0 -0.9 0.2 7th 174.4 120.6 high 145%
Falls Creek 0.1 -2.0 4.9 13th -3.9 -1.4 -7.3 25th 143.2 87.0 high 165%
Mount Buller -0.3 -2.5 3.9 13th -4.3 -2.0 -7.1 25th 257.6 149.8 high 172%
Mount Hotham -1.2 -1.9 3.5 13th -5.0 -1.7 -7.6 25th 202.0 140.5 high 144%
Omeo 10.4   13.0 30th 0.6   -4.8 8th 77.8
East Gippsland (district 84)
Combienbar AWS 11.6 -1.2 16.1 19th 4.2 -1.0 2.1 25th 92.8 61.0 high 152%
Gabo Island Lighthouse 15.3 +0.6 21.4 19th 8.1 -0.4 5.8 8th 47.2 71.9 low 66%
Gelantipy 9.5 -1.8 13.2 14th 2.3 -0.6 -1.3 7th 140.2 53.5 v high 262%
Lakes Entrance (Eastern Beach Road) 15.2   19.4 19th 6.0   -0.6 8th 84.7
Mallacoota 15.3 -0.5 20.9 19th 5.6 -0.8 1.8 26th 75.2 65.2 average 115%
Mount Nowa Nowa 12.9 -1.6 16.8 19th 5.5 -0.9 2.6 25th 127.4 57.8 v high 220%
Orbost 14.9   19.4 19th 5.2   1.2 8th 93.6 56.3 high 166%
Orbost (Comparison) 15.4 -0.6 19.5 15th 4.0 -0.8 -0.6 8th 102.6 58.7 v high 175%
Point Hicks (Lighthouse) 14.6 -0.4 19.0 19th 7.9 -0.6 4.0 8th 80.9 78.6 average 103%
West Gippsland (district 85)
Bairnsdale Airport 14.7 -1.0 18.1 19th 4.0 -0.5 -0.4 8th 50.2 36.0 high 139%
East Sale Airport 14.3 -0.7 17.1 23rd 3.2 -0.9 -1.7 8th 41.8 46.0 average 91%
Morwell (Latrobe Valley Airport) 13.5 -1.4 16.7 23rd 3.9 -0.4 -1.2 8th 66.8 63.1 average 106%
Mount Baw Baw 0.4 -2.8 5.8 13th -3.0 -1.7 -5.9 25th 255.0 151.3 high 169%
Mount Moornapa 12.0 -1.7 15.5 19th 4.7 -1.0 1.8 25th 83.8 47.8 v high 175%
Noojee (Slivar) 11.7 -1.7 14.5 23rd 3.8 +0.1 -1.5 9th 149.2 109.7 high 136%
Pound Creek 13.4   16.2 23rd 6.2   0.0 10th 123.8
Wilsons Promontory Lighthouse 12.4 -0.4 15.1 31st 8.4 +0.1 4.5 25th 240.0 121.4 v high 198%
Yarram Airport 13.9   16.7 31st 4.1   -1.6 8th 78.8
East Central (district 86)
Bundoora (Latrobe University) 13.4 -1.5 17.0 30th 6.0 -0.1 2.0 7th 76.6 57.7 high 133%
Cerberus 13.4 -1.3 16.2 30th 6.6 0.0 2.1 18th 119.6 78.5 high 152%
Coldstream 13.1 -1.7 16.4 9th 4.6 +0.3 -0.6 8th 121.8 68.9 v high 177%
Coldstream Comparison 13.1   16.2 30th 4.5   -0.7 8th 121.8
Cranbourne Botanic Gardens 13.4 -1.1 16.9 30th     2.5 7th 66.9 78.5 average 85%
Essendon Airport 13.5 -0.8 16.8 30th 5.9 +0.4 2.2 7th 65.0 49.3 high 132%
Ferny Creek (Dunns Hill) 8.3 -2.1 12.5 9th 4.0 -1.2 0.3 25th 143.2 89.1 high 161%
Frankston AWS 12.6 -1.1 16.6 30th 8.3 0.0 5.0 7th
Melbourne Airport 13.4 -1.0 16.8 30th 5.5 -0.4 1.8 25th 62.8 46.9 high 134%
Melbourne Regional Office 14.7 -0.3 18.6 30th 7.6 +0.9 4.2 25th 63.0 50.2 high 125%
Moorabbin Airport 13.6 -1.3 17.2 30th 6.7 -0.1 3.7 8th 83.2 66.9 high 124%
Rhyll 13.4 -0.9 16.5 30th 8.0 -0.3 5.5 25th 107.0 78.3 high 137%
Scoresby Research Institute 13.2 -1.0 16.5 9th 6.2 -0.1 2.2 7th 89.4 81.0 average 110%
Viewbank (ARPANSA) 13.6 -1.7 16.9 30th 6.1 -0.1 2.4 7th 84.0 59.5 high 141%
Wallan (Kilmore Gap) 8.9 -1.7 12.6 30th 3.4 -0.8 -0.3 25th 125.6 62.5 v high 201%
Wonthaggi 13.7 -0.7 16.5 30th 6.3 -0.4 3.0 7th 142.0 102.7 high 138%
West Central (district 87)
Avalon Airport 14.1 -1.4 18.2 30th 5.4 -0.1 1.5 7th 65.0 44.9 high 145%
Grovedale (Geelong Airport) 13.6 -1.4 17.2 30th 5.6 -0.2 2.2 7th 70.8 49.1 high 144%
Laverton RAAF 13.9 -1.0 17.6 30th 5.9 +0.4 2.3 10th 63.6 45.3 high 140%
Sheoaks 12.1 -1.3 15.1 30th 5.2 -0.1 1.2 10th 77.4 46.3 v high 167%
North Central (district 88)
Castlemaine Prison 11.7 -1.6 14.5 30th 3.5 0.0 -0.2 17th 122.0 67.7 v high 180%
Eildon Fire Tower 8.8 -1.7 12.1 30th 3.2 -1.1 -0.2 25th 122.6 77.4 high 158%
Lake Eildon 12.4 -1.2 16.0 9th 4.3 +0.1 1.0 7th 173.2 99.6 v high 174%
Mangalore Airport 12.6 -1.5 14.9 30th 3.8 -0.1 -2.2 17th 84.2 62.9 high 134%
Maryborough 12.5 -1.4 16.2 30th 4.1 +0.2 -1.2 17th 114.4 56.5 v high 202%
Redesdale 12.1 -1.5 15.3 30th 2.9 -0.1 -2.2 17th 120.2 60.8 v high 198%
Western Plains (district 89)
Ararat Prison 11.6 -1.3 15.5 30th 3.8 0.0 -1.5 17th 151.2 69.5 highest 218%
Ballarat Aerodrome 10.0 -1.4 13.4 30th 3.4 -0.3 -0.8 17th 161.0 75.3 v high 214%
Westmere 12.0   16.1 30th 4.9   1.4 10th 143.6
West Coast (district 90)
Aireys Inlet 13.0 -1.5 16.7 30th 6.5 -1.0 3.8 25th 115.0 70.0 high 164%
Cape Nelson Lighthouse 13.4 -1.1 16.6 22nd 8.4 -0.3 5.8 7th 121.0 101.5 average 119%
Cape Otway Lighthouse 12.7 -1.1 15.3 31st 7.7 -0.1 4.8 25th 221.2 103.6 highest 214%
Casterton 12.7   17.3 30th 5.0   -0.7 17th 132.8
Casterton Showgrounds 13.3 -1.4 17.4 30th 5.1 -0.4 -0.5 17th 133.4 85.9 high 155%
Colac (Mount Gellibrand) 11.2 -1.5 14.3 30th 4.9 -0.6 1.4 25th 104.6 64.0 v high 163%
Dartmoor 13.3   17.2 30th 5.6   1.2 29th 138.6
Hamilton Airport 11.9 -1.4 15.8 30th 4.3 -0.5 -0.1 17th 128.8 79.4 v high 162%
Mortlake Racecourse 12.8 -1.1 16.5 30th 5.1 +0.3 2.3 17th 167.0 68.1 v high 245%
Port Fairy AWS 13.7 -1.5 16.8 30th 6.9 -0.3 3.7 25th 163.6 88.3 v high 185%
Portland (Cashmore Airport) 12.8 -1.2 16.6 30th 6.7 +0.1 3.4 7th 174.0 105.1 v high 166%
Warrnambool Airport NDB 13.0 -1.5 16.6 30th 5.8 +0.1 2.7 10th 178.0 98.0 high 182%
Weeaproinah 8.9 -1.0 12.4 9th 4.1 -0.7 0.8 20th 628.0 235.4 highest 267%

Notes

A Monthly 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

Media
(03) 9669 4057
Enquiries