Victoria in December 2010: Record breaking rain.

  • The 5th wettest December on record
  • Very wet in the west and parts of the north with many stations breaking monthly and daily records.
  • Daytimes were cooler than usual in the north

Rainfall

December 2010 was the 5th wettest December in 110 years of record for Victoria. The last time Victoria received more rain was in 1992. Rainfall totals in the west of the state (the Mallee, Wimmera and South West forecast districts) were the highest total December rainfall on record for many stations, and very much above average for others. Daily and monthly rainfall records were broken at 10 stations that have over 100 years of record.

Parts of the north of the state (the Northern Country, North East and North Central forecast districts) were also very much wetter than normal. The wettest station for the state was Falls Creek (Rocky Valley) with a total of 313.6 mm for the month and they also recorded the single wettest day for the year on the 9th when they received 182.0 mm. Many stations also received their highest December daily rainfall on record.

Rainfall totals over Gippsland and around Melbourne were generally average to very much above average. There is a map of rainfall deciles below.

Maximum temperature

Average maximum temperatures were close to normal along the coast while further north they were 1 C to 2 C cooler than usual. Averaged across all of Victoria, daytime temperatures were only 0.63 C cooler than the long-term average.

In the northern parts of the state (the Wimmera, Mallee, Northern Country, North Central and North East forecast districts), daytime temperatures were below average to very much below average. Even though it was cooler than usual, parts of the north still recorded warmer temperatures than the south. The hottest single day was the 31st when Hopetoun Airport recorded 43.3 C. Almost all stations in Victoria recorded their hottest daily maximum temperature for the month on the 31st. The warmest days on average were 28.5 C at Ouyen (Post Office). As per usual, the coolest parts of the state were in the Alpine region with Mount Hotham recording an average maximum temperature of 11.3 C. Mount Hotham also recorded the single coldest day on the 19th with 1.2 C

In the southern parts of the state, daytime temperatures were close to their long-term average.

Rhyll had their highest December temperature on record. There is a map of maximum temperature anomalies below.

Minimum temperature

Average minimum temperature anomalies were generally positive and were mostly within 1 C of the long-term average. Averaged across all of Victoria, night-time temperatures across the state were only 0.37 C warmer than the long-term average.

The coldest night was the 28th when Mount Hotham recorded -4.4 C. Mount Hotham also recorded the coolest nights on average at 4.6 C. Hume Reservoir recorded the warmest nights on average at 14.9 C and Melbourne Regional Office recorded the single hottest night on the 8th with 22.6 C. Most of the state, except the northwest, recorded their warmest night for the month on the 8th due to extensive cloud cover.

Kyabram DPI had their lowest December temperature on record. There is a map of minimum temperature anomalies below.

Snow and hail

Unseasonable snow falls were reported in the Alpine region in mid-December. Hail was reported on the 19th at several stations across the state.

Further information

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Extremes in December 2010
Hottest day 43.3 C at Hopetoun Airport on the 31st
Warmest days on average 28.5 C at Ouyen (Post Office)
Coolest days on average 11.3 C at Mount Hotham
Coldest day 1.2 C at Mount Hotham on the 19th
Coldest night -4.4 C at Mount Hotham on the 28th
Coolest nights on average 4.6 C at Mount Hotham
Warmest nights on average 14.9 C at Hume Reservoir
Warmest night 22.6 C at Melbourne Regional Office on the 8th
Warmest on average overall 21.3 C at Mildura Airport
Coolest on average overall 8.0 C at Mount Hotham
Wettest overall 313.6 mm at Falls Creek (Rocky Valley)
Wettest day 182.0 mm at Falls Creek (Rocky Valley) on the 9th
Highest wind gust 124 km/h at Mount Hotham on the 8th

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 December daily rainfall
Highest daily rainfall
in December 2010 (mm)
Previous wettest
for December
Years of
record
Wickliffe 76.8 on the 13th 67.1 on the 4th in 1937 131
Cavendish (Post Office) 106.8 on the 8th 65.0 on the 13th in 2008 126
Balmoral (Post Office) 103.2 on the 8th 56.4 on the 13th in 2008 124
Tungamah 83.4 on the 9th 57.7 on the 15th in 1894 120
Natimuk 54.2 on the 8th 52.1 on the 28th in 1929 115
Dunkeld 78.4 on the 8th 64.0 on the 13th in 2008 112
Nullawarre 70.2 on the 8th 61.6 on the 3rd in 1985 112
Willaura (Main Street) 98.0 on the 8th 64.8 on the 13th in 1966 108
Harrow (Post Office) 72.0 on the 7th 66.3 on the 13th in 2008 102
Murrayville 70.0 on the 8th 41.1 on the 25th in 1919 100
Patchewollock 67.0 on the 8th 58.4 on the 1st in 1987 81
Werrimull 71.0 on the 8th 58.8 on the 31st in 2002 76
Walpeup Research 78.0 on the 8th 41.0 on the 21st in 1992 72
Tawonga 144.2 on the 9th 69.0 on the 22nd in 2007 57
Falls Creek (Rocky Valley) 182.0 on the 9th 128.6 on the 14th in 1993 56
Apsley (Post Office) 48.4 on the 8th 38.6 on the 10th in 1971 54
Warracknabeal Museum 66.4 on the 8th 53.8 on the 7th in 1985 42
Bright 84.5 on the 9th 59.4 on the 29th in 1980 41
Glen Waverley (Golf Course) 82.0 on the 20th 60.6 on the 17th in 1991 37
Hamilton Airport 84.8 on the 8th 66.0 on the 13th in 2008 28
Mount Buller 102.8 on the 9th 69.8 on the 17th in 1986 28
Edi Upper 74.0 on the 9th 57.8 on the 7th in 1996 26



Record highest total December rainfall
Total rainfall
for December 2010 (mm)
Previous wettest
for December
Years of
record
Average for
December
Horsham Polkemmet Rd 150.2 145.8 in 1930 138 28.6
Dimboola 141.0 111.8 in 1992 132 25.7
Balmoral (Post Office) 222.2 122.7 in 1902 124 37.3
Merino 176.0 149.4 in 1986 119 43.4
Natimuk 130.6 116.5 in 1930 113 29.1
Berriwillock 99.8 99.1 in 1930 108 22.9
Willaura (Main Street) 169.4 162.3 in 1966 107 40.7
Rupanyup (Post Office) 148.2 124.7 in 1930 104 28.8
Woomelang 119.6 101.7 in 1930 103 24.1
Murrayville 122.8 82.0 in 1966 100 22.9
Drung Drung 142.6 137.8 in 1930 98 28.6
Patchewollock 97.2 96.8 in 2004 80 23.9
Werrimull 132.2 74.4 in 1983 77 18.4
Walpeup Research 141.6 121.6 in 1992 71 25.2
Tawonga 247.8 212.0 in 1988 67 70.0
Casterton Showgrounds 149.4 137.6 in 1986 55 43.0
Donald 116.0 93.8 in 1992 45 26.9
Ararat Prison 105.2 102.0 in 1987 42 38.2
Warracknabeal Museum 123.4 81.2 in 1992 42 28.0
Bright 208.2 192.3 in 1971 40 76.6
Portland (Cashmore Airport) 125.0 113.8 in 2008 29 52.1
Warrenbayne 152.2 121.8 in 1999 29 51.6
Mount Buller 274.2 246.9 in 1985 28 94.9
Edi Upper 205.0 177.0 in 1988 25 77.2

Highest total December rainfall for at least 20 years
Total rainfall
for December 2010 (mm)
Most recent December
at least this wet
Years since
wetter
Average for
December
Cape Otway Lighthouse 136.4 153.7 in 1875 135 53.4
Cavendish (Post Office) 146.4 152.4 in 1902 108 41.5
Longerenong 126.0 131.6 in 1930 79 28.0
Beaufort 150.4 156.2 in 1930 78 48.4
Beulah 105.4 261.4 in 1930 77 25.5
Goroke (Post Office) 97.6 107.6 in 1930 77 28.6
Ouyen (Post Office) 94.2 162.2 in 1933 77 25.2
Yanac North 98.4 107.0 in 1936 74 25.0
Echuca Aerodrome 85.9 89.9 in 1954 56 29.1
Birchip (Woodlands) 79.4 123.2 in 1961 49 24.5
Kaniva 102.2 103.4 in 1961 49 28.1
Mansfield (Post Office) 136.1 263.3 in 1966 43 50.7
Wickliffe 98.4 121.0 in 1966 43 38.2
Euroa 134.8 161.9 in 1966 40 41.8
Dellicknora (Tellicura) 126.8 142.5 in 1970 39 69.2
Whitlands (Burder's Lane) 242.8 259.8 in 1975 35 81.1
Yackandandah 173.6 189.0 in 1975 35 59.8
Bonnie Doon Garage 142.8 143.0 in 1975 34 47.8
Strathbogie 143.8 191.2 in 1975 34 56.6
Alexandra (Post Office) 109.0 117.4 in 1978 32 49.1
Boort 103.4 108.2 in 1966 32 26.3
Tungamah 141.0 141.2 in 1975 32 33.9
Hamilton Airport 126.0 147.8 in 1985 25 47.1
Nullawarre 147.4 194.5 in 1985 25 54.1
Tubbut 127.4 154.2 in 1985 25 65.7
Labertouche 137.4 179.4 in 1985 24 77.9
Yea 103.2 127.8 in 1985 24 46.8
Apsley (Post Office) 117.4 118.4 in 1986 23 33.8
Dunkeld 126.0 140.8 in 1985 23 47.0
Seymour Shire Depot 91.4 99.3 in 1985 23 39.0
Burrowye Station 151.3 172.0 in 1988 22 62.2
Dookie Agricultural College 99.0 133.6 in 1988 22 35.7
Eldorado 150.2 169.8 in 1988 22 49.3
Wonthaggi 123.8 126.6 in 1988 22 61.2
Bonang 123.4 165.3 in 1985 21 75.6
Strath Creek 124.8 126.4 in 1988 21 55.0



Record highest December temperature
Highest temperature
in December 2010 (C)
Previous warmest
for December
Years of
record
Average for
December
Rhyll 37.2 on the 31st 36.1 on the 10th in 2006 20 21.5



Record lowest December temperature
Lowest temperature
in December 2010 (C)
Previous coolest
for December
Years of
record
Average for
December
Kyabram DPI 3.7 on the 28th 3.9 on the 4th in 1967 44 12.4



Summary statistics for December 2010
Maximum temperatures
for December
(C)
Minimum temperatures
for December
(C)
Rainfall
for December
(millimetres)
Mean for
December
2010
Diff
from
average
Highest for
December
2010
Mean for
December
2010
Diff
from
average
Lowest for
December
2010
Total for
December
2010
Average
for
December
Rank of
December
2010
Fraction of
December
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 27.1 -2.1 38.1 31st 14.5 +0.9 8.6 20th 74.2 42.0 high 177%
Hume Reservoir 26.8 -1.8 38.2 31st 14.9 +0.6 8.9 20th 99.2 49.7 high 200%
North Mallee (district 76)
Mildura Airport 28.3 -1.8 42.1 31st 14.4 -0.4 8.0 20th 146.8 25.2 v high 583%
Ouyen (Post Office) 28.5 -1.7 42.7 31st 14.0 +0.4 7.4 20th 94.2 25.2 v high 374%
Walpeup Research 28.1 -1.6 42.6 31st 13.7 +0.2 6.8 20th 141.6 25.2 highest 562%
South Mallee (district 77)
Hopetoun Airport 28.4 43.3 31st 12.6 6.4 20th 111.2
Swan Hill Aerodrome 28.2 -2.0 41.7 31st 13.1 -0.2 6.8 20th 45.8 22.4 high 204%
North Wimmera (district 78)
Nhill Aerodrome 26.5 42.0 31st 12.2 6.1 20th 99.4
Warracknabeal Museum 27.0 -1.6 42.2 31st 12.5 +0.4 6.0 20th 123.4 28.0 highest 441%
South Wimmera (district 79)
Edenhope Airport 24.8 38.8 31st 11.7 5.9 22nd 154.2
Grampians (Mount William) 16.0 31.0 31st 7.2 0.7 20th 139.0
Horsham Aerodrome 26.2 -2.2 41.7 31st 10.8 +0.5 4.3 28th 39.2 28.4 high 138%
Horsham Polkemmet Rd 26.3 -1.4 42.0 31st 11.1 -0.4 5.2 28th 150.2 28.6 highest 525%
Kanagulk 25.3 40.6 31st 11.4 5.5 22nd 156.4
Longerenong 26.6 -1.1 43.2 31st 11.1 -0.1 4.4 28th 126.0 28.0 v high 450%
Pyrenees (Ben Nevis) 18.1 33.6 31st 8.0 -0.3 28th 109.8
Stawell Aerodrome 24.0 -2.4 40.3 31st 11.5 +0.5 4.4 22nd 82.6 35.4 v high 233%
Lower North (district 80)
Charlton 26.9 42.3 31st 12.3 5.7 20th 61.0
Echuca Aerodrome 27.5 -1.5 41.2 31st 12.7 -0.7 5.5 28th 85.9 29.1 v high 295%
Kerang 27.9 -1.8 42.1 31st 13.9 +0.5 7.1 20th 52.2 27.6 high 189%
Kyabram DPI 27.0 -0.9 40.8 31st 12.4 0.0 3.7 28th 55.0 32.4 high 170%
Upper North (district 81)
Bendigo Airport 25.4 -1.6 40.8 31st 12.1 +0.6 4.5 22nd 104.0 43.7 high 238%
Tatura Inst Sustainable Ag 26.1 -1.3 39.2 31st 12.5 +0.3 5.0 28th 103.6 34.3 v high 302%
Yarrawonga 28.1 -1.8 40.7 31st 13.3 +0.3 5.0 28th 160.4 40.5 v high 396%
Lower Northeast (district 82)
Beechworth Woolshed 25.5 -2.1 37.5 31st 11.5 +1.0 5.4 22nd 113.5 59.8 high 190%
Benalla Airport 26.5 39.0 31st 13.0 6.6 22nd 118.0
Corryong Airport 26.6 35.4 31st 12.1 5.6 28th 126.0
Dartmouth Reservoir 25.0 -1.8 35.3 31st 12.0 +0.5 6.5 28th 110.6 72.7 high 152%
Hunters Hill 21.2 -1.5 30.9 31st 11.2 -0.6 2.4 20th 188.8 80.1 high 236%
Rutherglen Research 27.2 -2.0 39.6 31st 12.6 +1.2 4.2 28th 115.8 44.2 v high 262%
Strathbogie 22.5 -2.1 35.0 31st 10.0 +0.8 3.3 22nd 143.8 56.6 v high 254%
Wangaratta Aero 26.6 -2.4 38.7 31st 13.1 +1.6 5.6 28th 44.8 39.3 average 114%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 18.1 -1.6 26.9 31st 6.5 +0.2 -2.9 28th 152.0 64.5 v high 236%
Falls Creek 13.0 -2.1 22.3 31st 5.3 -0.8 -3.0 28th 112.4 103.2 average 109%
Mount Buller 12.0 -2.6 23.1 31st 5.0 -1.1 -3.1 28th 274.2 94.9 highest 289%
Mount Hotham 11.3 -2.4 20.8 31st 4.6 -0.9 -4.4 28th 232.6 103.9 high 224%
Omeo 22.1 33.0 31st 9.2 -0.7 28th 132.2
East Gippsland (district 84)
Combienbar AWS 22.4 -0.5 35.4 31st 11.1 -0.1 4.3 28th
Gabo Island Lighthouse 20.5 +0.6 23.9 31st 14.7 +0.4 10.2 28th 129.4 67.3 high 192%
Gelantipy 20.5 -0.7 31.8 31st 9.8 +0.4 1.0 28th 131.8 65.2 v high 202%
Lakes Entrance (Eastern Beach Road) 22.1 36.4 31st 13.2 8.0 28th 68.6
Mallacoota 22.2 +0.3 32.2 31st 14.1 +0.8 8.8 28th 114.2 73.0 high 156%
Mount Nowa Nowa 22.3 +0.1 39.1 31st 12.1 +0.2 5.6 28th 56.6 80.3 low 70%
Orbost 23.5 -0.3 38.6 31st 13.1 +0.6 6.4 28th 127.4 66.1 v high 193%
Orbost (Comparison) 23.9 +0.3 38.7 31st 12.4 +0.6 5.0 28th 120.0 78.1 high 154%
Point Hicks (Lighthouse) 22.4 +0.5 35.6 31st 14.3 +0.2 9.2 20th 113.3 73.1 high 155%
West Gippsland (district 85)
Bairnsdale Airport 23.5 0.0 39.0 31st 11.8 +0.7 4.5 28th 92.2 60.2 v high 153%
East Sale Airport 23.5 +0.1 38.1 31st 12.0 +0.7 3.0 28th 81.2 54.4 high 149%
Morwell (Latrobe Valley Airport) 23.6 -0.5 38.1 31st 11.4 +0.3 2.5 28th 75.6 68.4 average 111%
Mount Baw Baw 12.8 -1.5 24.7 31st 4.8 -0.8 -2.8 28th 188.0 149.8 high 126%
Mount Moornapa 22.1 -0.6 37.6 31st 11.1 0.0 5.2 28th 118.6 54.7 v high 217%
Noojee (Slivar) 21.8 -0.7 36.0 31st 10.5 +0.8 3.0 28th 127.2 95.3 high 133%
Pound Creek 22.0 36.8 31st 11.2 4.9 24th 75.0
Wilsons Promontory Lighthouse 18.9 +0.1 30.5 31st 13.3 +0.7 9.2 27th 108.2 63.7 high 170%
Yarram Airport 22.8 38.3 31st 11.0 4.4 24th 68.0
East Central (district 86)
Bundoora (Latrobe University) 24.9 +0.2 40.8 31st 12.5 +0.2 5.5 28th 76.0 64.2 average 118%
Cerberus 22.4 +0.2 38.7 31st 12.2 +0.4 6.0 22nd 78.8 53.1 high 148%
Coldstream 24.5 -0.4 39.2 31st 11.1 +1.7 4.3 28th 145.6 53.6 v high 272%
Coldstream Comparison 24.4 39.1 31st 10.9 4.1 28th 142.2
Cranbourne Botanic Gardens 22.9 -0.4 38.9 31st 11.7 0.0 6.5 24th 133.4 64.9 v high 206%
Essendon Airport 24.4 +0.1 40.7 31st 12.5 +0.8 6.2 28th 63.6 51.5 high 123%
Ferny Creek (Dunns Hill) 19.6 -0.3 34.2 31st 10.2 0.0 5.3 28th 166.0 88.8 high 187%
Frankston AWS 22.1 -0.1 34.0 31st 14.3 +0.6 10.2 24th
Melbourne Airport 24.1 -0.3 40.4 31st 11.9 -0.1 6.0 28th 86.6 49.3 high 176%
Melbourne Regional Office 24.8 +0.6 41.1 31st 14.5 +1.6 9.0 28th 85.2 59.3 high 144%
Moorabbin Airport 23.5 -0.3 40.2 31st 13.1 +0.6 7.8 28th 111.2 59.6 v high 187%
Rhyll 21.9 +0.4 37.2 31st 14.0 +0.5 10.1 27th 74.6 44.4 high 168%
Scoresby Research Institute 23.9 0.0 39.6 31st 12.1 +0.3 5.1 28th 153.2 76.6 v high 200%
Viewbank (ARPANSA) 24.6 -0.8 40.5 31st 12.5 +0.1 4.9 28th 109.2 69.1 high 158%
Wallan (Kilmore Gap) 20.5 -1.2 35.4 31st 10.1 +0.2 4.2 28th 73.6 45.3 high 162%
Wonthaggi 22.5 +0.6 38.5 31st 12.0 +0.5 7.0 24th 123.8 61.2 v high 202%
West Central (district 87)
Avalon Airport 24.0 0.0 42.8 31st 11.5 -0.1 5.2 22nd 26.0 29.6 average 88%
Grovedale (Geelong Airport) 23.5 +0.8 42.3 31st 10.9 0.0 4.7 22nd 29.2 40.1 average 73%
Laverton RAAF 23.6 -0.1 41.9 31st 12.1 +0.2 6.6 22nd 55.4 45.8 average 121%
Sheoaks 23.8 +0.6 40.3 31st 10.1 -0.1 3.0 22nd 36.0 33.0 average 109%
North Central (district 88)
Castlemaine Prison 23.4 -2.0 39.0 31st 11.2 +0.5 3.3 28th 70.5 41.8 high 169%
Eildon Fire Tower 21.4 -2.3 34.3 31st 10.9 -0.1 4.7 20th 122.8 41.9 v high 293%
Lake Eildon 25.1 -1.1 38.6 31st 12.1 +1.2 4.9 22nd 121.6 56.2 v high 216%
Mangalore Airport 25.5 -1.4 39.6 31st 12.0 +0.2 6.1 28th 74.2 41.1 high 181%
Maryborough 24.7 -1.9 40.2 31st 11.3 0.0 4.9 28th 53.3 37.7 high 141%
Redesdale 24.7 -1.6 39.8 31st 10.3 +0.4 3.1 22nd 73.0 38.1 high 192%
Western Plains (district 89)
Ararat Prison 23.5 -0.9 40.2 31st 10.7 +1.5 2.8 28th 105.2 38.2 highest 275%
Ballarat Aerodrome 22.1 -0.5 37.6 31st 9.7 +0.3 1.8 22nd 58.4 51.4 average 114%
Westmere 23.6 40.2 31st 10.1 2.7 22nd 108.6
West Coast (district 90)
Aireys Inlet 21.1 +0.2 40.1 31st 12.0 -0.1 7.2 22nd 40.0 40.2 average 100%
Cape Nelson Lighthouse 19.6 +0.1 33.4 31st 13.0 +0.1 8.4 22nd 95.2 44.2 v high 215%
Cape Otway Lighthouse 19.1 -0.8 31.1 31st 12.6 +0.6 7.6 22nd 136.4 53.4 v high 255%
Casterton 22.7 37.0 31st 10.7 3.8 28th 128.2
Casterton Showgrounds 24.6 +0.2 37.0 31st 11.6 +1.3 4.4 28th 149.4 43.0 highest 347%
Colac (Mount Gellibrand) 21.5 -1.6 38.7 31st 10.3 -0.3 5.6 20th 40.0 39.8 average 101%
Dartmoor 23.4 37.9 31st 10.9 3.8 22nd 110.2
Hamilton Airport 22.5 -1.3 32.1 5th 10.0 +0.6 3.6 22nd 126.0 47.1 v high 268%
Mortlake Racecourse 22.4 -0.7 37.6 31st 10.5 +1.4 3.5 22nd 129.0 46.9 v high 275%
Port Fairy AWS 21.1 0.0 38.2 31st 12.6 +0.3 7.7 16th 105.2 44.5 high 236%
Portland (Cashmore Airport) 20.1 0.0 34.4 31st 11.3 +0.5 5.0 22nd 125.0 52.1 highest 240%
Warrnambool Airport NDB 21.8 -0.7 37.3 31st 10.8 +0.9 4.8 22nd 113.4 51.5 high 220%
Weeaproinah 18.0 +0.2 33.6 31st 9.4 +0.1 5.4 22nd 200.4 114.0 high 176%

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 10 am on Wednesday 5 January 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

Media
(03) 9669 4057
Enquiries