Victoria in 2010: Fifth wettest year on record

  • Wettest year in Victoria since 1974
  • Warmer than average nights state-wide
  • Daytime temperatures close to average due to a cool spring

Rainfall

Flooding rains and one of the wettest spring seasons on record in Victoria culminated in the state recording its 5th wettest year, following particularly wet La Nia years during the 1970s and 1950s. Almost two-thirds of the state received rainfall totals very much above the long-term average in 2010. In fact, several stations in the North Central district recorded their highest total rainfall on record, including Alexandra (Post Office) (1100.8 mm), Lancefield (1071.0 mm), Mansfield (Post Office) (1120.1 mm), Redesdale (1098.0 mm) and Yea (1056.8 mm). Mildura Airport and Bendigo Airport both doubled their usual annual rainfall in 2010 and many stations state-wide recorded their highest total rainfall since the early 1970s.

Although Victoria observed several wet months early in 2010, most of the rain was recorded in the second half of the year. Persistent wet conditions through these months were driven by record warmth in the tropical waters around northern Australia. The strong La Nia event in the Pacific Ocean, coupled with warm sea-surface temperatures off the north-west coast of Australia, created conditions conducive to the formation of north-west cloudbands. These systems brought tropical moisture to Victoria from September to December and led to above average rainfall across the state, but particularly in regions north of the Divide.

The wettest locations in the state were in the Alpine area, with Falls Creek (Rocky Valley) taking the honours for the wettest spot in the state, recording in excess of 3000 mm for the year. Notably, after 14 years of dry conditions, Melbourne Regional Office recorded its first year of above average rainfall. Rainfall totals surpassed 1996, the last year to record above average rainfall at this site. In contrast to the prevailing wet conditions, Gippsland stations did not observe the deluge experienced to the north of the Divide, yet the region still managed rainfall totals close to the climatological average.

Maximum temperature

Maximum temperatures across Victoria in 2010 were very close to the long-term average. The southern half of the state experienced, on average, warmer daytime temperatures than usual. Melbourne Regional Office, Gabo Island Lighthouse, East Sale Airport and Wonthaggi all recorded average daytime temperatures significantly higher than usual.

Port Fairy AWS recorded its highest temperature on record, a sweltering 44.3 C on the 11th of January. This same day was by far the warmest of 2010 state-wide, with most stations registering temperatures in excess of 42 C and Avalon Airport reaching a scorching 45.7 C.

In contrast, some locations in northern Victoria recorded annual minimum temperatures that were cooler than normal, including the Eildon Fire Tower, Swan Hill Aerodrome and Horsham Aerodrome. Not surprisingly, the Alpine region experienced the coldest daytime temperatures in the state, with Mount Hotham the coolest, averaging just 7.7 C for the year and a chilly -5.3 C on the 28th of June.

Minimum temperature

Also consistent with the high rainfall, night-time temperatures for the year were above average across Victoria, which experienced its 6th highest average minimum temperature on record. Most locations recorded night-time temperatures significantly higher than usual, especially Melbourne Regional Office which was 1.9 C warmer than normal, whilst Essendon Airport and Wilsons Promontory Lighthouse were both 1.1 C warmer than usual. Gabo Island Lighthouse recorded the warmest nights overall this year, averaging 12.7 C.

The high pressure belt was further south than usual throughout 2010 which, combined with record warm sea surface temperatures in the Australian region, lead to more frequent high humidity events. These events were particularly prominent in late November and early December. Overnight temperatures were much warmer than usual throughout late summer and early autumn, with February to April 2010 the 3rd warmest for Victoria. Night-time temperatures were very close to usual in winter, whilst spring ranked as the 8th warmest, due to an especially warm November.

The standout for the warmest night for the entire state was the 12th of January, with numerous locations, particularly in the Mallee, reporting temperatures exceeding 28 C. In fact, some locations registered their warmest night (highest daily minimum temperature) on record in 2010, with Maryborough, Castlemaine Prison and Bendigo Airport all reporting their warmest overnight temperatures on the 12th of January (28.9 C, 28.5 C and 27.3 C respectively). Melbourne Regional Office recorded its equal highest overnight minimum temperature, a stifling 30.6 C early in the morning of January the13th.

Some significant weather events in 2010

Hail: Severe thunderstorms developed to the northwest of the Melbourne Metropolitan Area and moved through the city from early afternoon on the 6th of March, progressing to the eastern suburbs and then into West Gippsland later in the afternoon. The thunderstorms were associated with large hail and heavy rain resulting in widespread flash flooding as well as water and hail damage to property.

Snow: 2010 brought a bumper snow season to the Victorian Alps with particularly heavy falls throughout August. Late season snow fall in mid-October to low levels was unusual; however unseasonable snow falls were also reported in mid-December.

Flood: Significant rainfall events during September and December resulted in two major flood events across Victoria. The rainfall associated with the September event (4th-6th) was widespread, but concentrated to the north of the Divide, resulting in major and moderate flooding spanning the north from the east to the west of the State. Several sites recorded their highest river levels on record including Clunes, Dohertys and Yawong Weir, all recording peak levels over 5m.

Further information

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Extremes in 2010
Hottest day 45.7 C at Avalon Airport on 11 Jan
Warmest days on average 23.6 C at Mildura Airport
Coolest days on average 7.7 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 2.0 C at Mount Hotham
Warmest nights on average 12.7 C at Gabo Island Lighthouse
Warmest night 29.8 C at Mildura Airport on 12 Jan
Warmest on average overall 17.2 C at Mildura Airport
Coolest on average overall 4.8 C at Mount Hotham
Wettest overall 3026.8 mm at Falls Creek (Rocky Valley)
Driest overall 454.0 mm at Hopetoun Airport
Wettest day 182.0 mm at Falls Creek (Rocky Valley) on 9 Dec
Highest wind gust 156 km/h at Shepparton Airport on 7 Mar

Maps

Anomaly in mean maximum temperature for all of Victoria

Map of Anomaly in mean maximum temperature for all of Victoria

Anomaly in mean minimum temperature for all of Australia

Map of Anomaly in mean minimum temperature for all of Australia

Rainfall deciles

Map of Rainfall deciles


Record highest total annual rainfall
Total rainfall
for 2010 (mm)
Previous annual
wettest
Years of
record
Annual
average
Alexandra (Post Office) 1100.8 1089.7 in 1973 127 712.7
Dunolly 869.8 853.6 in 1973 126 495.1
Yea 1056.8 1024.0 in 1887 120 637.2
Lancefield 1071.0 1063.6 in 1887 116 724.7
Mansfield (Post Office) 1120.1 1093.2 in 1956 106 708.7
Boort 781.8 778.5 in 1973 105 396.7
Willaura (Main Street) 850.2 780.4 in 1992 95 550.4
Redesdale 1098.0 985.8 in 1973 91 579.3
Mildura Airport 597.0 536.4 in 1973 64 287.5
Eppalock Reservoir 925.2 885.8 in 1973 44 524.7
Lake Buffalo 1658.7 1500.4 in 1992 36 1070.1
Strath Creek 1197.2 907.6 in 1988 27 691.6
Edi Upper 1606.2 1495.8 in 1992 22 1047.0

Highest total annual rainfall for at least 20 years
Total rainfall
for 2010 (mm)
Most recent annual
at least this wet
Years since
wetter
Annual
average
Koetong 1566.8 2317.6 in 1894 74 1119.5
Whitlands (Burder's Lane) 2219.6 2332.0 in 1939 69 1410.0
Lake Eildon 1284.3 1401.3 in 1956 53 852.2
Lilydale 1224.6 1233.7 in 1952 52 899.1
Apollo Bay 1366.6 1458.5 in 1964 42 1055.6
Wickliffe 801.7 871.1 in 1964 42 559.1
Dartmouth Reservoir 1343.8 1360.8 in 1931 41 1008.6
Ararat Prison 812.7 908.6 in 1973 37 592.4
Maryborough 950.7 1022.2 in 1973 37 528.5
Annuello 528.4 646.6 in 1973 36 313.1
Ballarat Aerodrome 879.6 958.2 in 1973 36 694.7
Cairn Curran Reservoir 711.2 961.9 in 1973 36 504.7
Chiltern (Post Office) 1070.4 1137.7 in 1974 36 689.4
Clunes 869.6 1016.1 in 1973 36 584.3
Eldorado 1036.6 1038.3 in 1974 36 665.3
Heathcote 979.0 1048.0 in 1973 36 574.4
Mitta Mitta Forestry 1405.4 1443.1 in 1974 36 1043.4
Narraport 598.4 642.9 in 1973 36 353.4
Natte Yallock 779.6 888.1 in 1973 36 469.8
Strathbogie 1425.8 1579.2 in 1973 36 968.9
Donald 673.6 780.3 in 1973 35 393.3
Kyneton 1031.0 1270.5 in 1973 35 784.8
Rochester 784.2 983.1 in 1973 35 443.6
Sea Lake (Post Office) 605.6 651.4 in 1973 35 330.9
Warracknabeal Museum 585.8 710.3 in 1974 35 399.5
Castlemaine Prison 962.4 970.0 in 1973 34 602.4
Cobram (Goulburn Murray) 702.0 779.7 in 1974 34 466.6
Daylesford 1248.0 1321.5 in 1973 34 879.2
Echuca Aerodrome 683.1 843.6 in 1974 34 426.6
Korong Vale (Burnbank) 758.4 847.3 in 1973 34 426.6
Longerenong 624.0 632.5 in 1974 34 417.6
Walpeup Research 546.0 694.4 in 1973 34 338.1
Euroa 999.4 1119.9 in 1973 33 649.4
Mangalore Airport 895.4 971.6 in 1973 33 572.2
Raywood 893.8 928.4 in 1973 33 433.6
Rutherglen Research 920.8 1027.3 in 1974 33 585.1
Stanhope 711.0 717.3 in 1974 33 451.2
Harrietville 1967.7 2029.2 in 1973 32 1423.1
Inglewood (Post Office) 867.8 957.9 in 1973 32 464.2
Rupanyup (Post Office) 716.4 735.9 in 1973 32 428.5
Toorourrong Reservoir (Toorourrong) 1099.0 1157.8 in 1978 32 798.2
Kinglake West (Wallaby Creek) 1604.4 1612.8 in 1974 31 1200.8
Seymour Shire Depot 936.8 940.9 in 1974 31 601.8
Tatura Inst Sustainable Ag 722.4 762.5 in 1974 31 482.0
Dimboola 591.0 689.4 in 1974 30 410.3
Melbourne Airport 729.8 820.8 in 1978 30 545.4
Tungamah 793.4 840.0 in 1974 30 509.3
Woods Point 1781.2 1924.7 in 1974 30 1472.7
Avenel (Post Office) 997.9 1034.0 in 1973 29 605.0
Bright 1644.3 1673.6 in 1974 29 1183.1
Canary Island 664.9 811.7 in 1973 29 361.1
Lismore (Post Office) 839.4 839.6 in 1978 29 623.9
Nagambie (Goulburn Weir) 925.6 1090.0 in 1973 29 540.9
Yan Yean 907.4 937.8 in 1978 29 663.7
Moorabbin Airport 869.2 944.8 in 1978 28 713.8
Rushworth 903.2 929.8 in 1974 28 526.5
Wedderburn (Post Office) 766.2 863.4 in 1973 28 477.4
Yackandandah 1401.4 1420.0 in 1974 28 945.9
Burrowye Station 1288.3 1400.1 in 1974 27 872.0
Murchison 754.0 840.4 in 1974 26 547.3
Werrimull 508.2 582.6 in 1974 25 273.3
Avalon Airport 558.0 776.0 in 1978 21 451.6



Record highest annual temperature
Highest temperature
in 2010 (C)
Previous annual
warmest
Years of
record
Annual
average
Port Fairy AWS 44.3 on 11 Jan 42.9 on 22 Jan 2006 20 18.5



Record highest annual daily minimum temperature
Highest daily minimum
temperature
in 2010 (C)
Previous annual
warmest
Years of
record
Annual
average
Maryborough 28.9 on 12 Jan 26.4 on 21 Jan 1997 46 8.0
Castlemaine Prison 28.5 on 12 Jan = 28.5 on 29 Jan 2009 43 7.6
Noojee (Slivar) 23.9 on 21 Feb 23.3 on 3 Nov 2005 29 7.1
Bendigo Airport 27.3 on 12 Jan 26.6 on 5 Feb 2000 20 7.7



Record highest annual mean daily minimum temperature
Mean daily minimum
temperature
for 2010 (C)
Previous annual
warmest
Years of
record
Annual
average
Lake Eildon 8.8 = 8.8 in 2007 39 7.9
Noojee (Slivar) 7.9 7.7 in 1999 24 7.1



Summary statistics for 2010
Maximum temperatures
(C)
Minimum temperatures
(C)
Rainfall
(millimetres)
Mean
for
2010
Diff
from
average
Highest
for
2010
Mean
for
2010
Diff
from
average
Lowest
for
2010
Total
for
2010
Average
annual
total
Rank
of
2010
Fraction
of annual
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 21.9 -0.5 42.4 12 Jan 9.7 +0.7 -2.0 14 Jun 916.4 594.0 v high 154%
Hume Reservoir 21.9 +0.4 41.9 12 Jan 10.9 +1.0 0.2 14 Jun 1001.6 693.8 v high 144%
North Mallee (district 76)
Mildura Airport 23.6 -0.1 44.2 10 Jan 10.8 +0.5 -1.3 17 Aug 597.0 287.5 highest 208%
Ouyen (Post Office) 23.4 -0.2 45.4 10 Jan 10.5 +0.9 -0.5 17 Aug 499.1 331.4 v high 151%
Walpeup Research 23.3 +0.2 45.0 10 Jan 10.4 +0.6 -0.9 6 Jul 546.0 338.1 v high 161%
South Mallee (district 77)
Hopetoun Airport 23.2   44.6 10 Jan 8.8   -3.3 25 Jul 454.0
Swan Hill Aerodrome 23.1 -0.7 44.5 10 Jan 9.7 +0.6 -1.7 9 Jul 582.4 308.0 v high 189%
North Wimmera (district 78)
Nhill Aerodrome 21.8   43.6 11 Jan 8.7   -2.7 27 Jun 459.2
Warracknabeal Museum 22.1 -0.2 44.2 11 Jan 9.0 +0.3 -1.2 17 Aug 585.8 399.5 v high 147%
South Wimmera (district 79)
Edenhope Airport 20.4   43.3 11 Jan 8.7   -1.9 27 Jun 714.8
Grampians (Mount William) 11.8   35.3 11 Jan 5.0   -3.3 16 Oct 1427.0
Horsham Aerodrome 21.4 -0.8 44.1 11 Jan 7.6 +0.6 -2.2 22 May 496.4 374.8 v high 132%
Horsham Polkemmet Rd 21.5 0.0 44.6 11 Jan 7.7 -0.5 -2.5 22 May 639.0 447.3 v high 143%
Kanagulk 20.5   43.3 11 Jan 8.1   -2.4 27 Jun
Longerenong 21.5 +0.1 44.6 11 Jan 7.9 0.0 -2.9 27 Jun 624.0 417.6 v high 149%
Pyrenees (Ben Nevis) 14.4   38.0 11 Jan 6.7   -2.6 16 Oct 1033.4
Stawell Aerodrome 20.1 -0.6 42.7 11 Jan 8.7 +0.4 -1.5 15 Jun 711.6 493.2 v high 144%
Lower North (district 80)
Charlton 22.2   44.2 11 Jan 9.0   -2.2 28 Jun 625.8
Echuca Aerodrome 22.3 +0.1 43.6 11 Jan 9.4 +0.1 -1.6 27 Jul 683.1 426.6 v high 160%
Kerang 22.8 -0.1 44.6 11 Jan 10.1 +0.7 -0.7 4 Jul 665.5 374.3 v high 178%
Kyabram DPI 22.1 +0.6 43.8 11 Jan 9.1 +0.6 -2.5 27 Jul 653.0 444.2 v high 147%
Upper North (district 81)
Bendigo Airport 20.8 -0.1 43.0 11 Jan 8.5 +0.8 -4.0 28 Jun 1060.8 506.5 v high 209%
Tatura Inst Sustainable Ag 21.4 +0.1 42.1 11 Jan 8.8 +0.5 -2.9 20 Jul 722.4 482.0 v high 150%
Lower Northeast (district 82)
Benalla Airport 21.7   42.7 11 Jan 8.6   -3.4 14 Jun 944.5
Corryong Airport 21.1   41.2 12 Jan 7.2   -5.7 14 Jun 1265.1
Dartmouth Reservoir 20.3 -0.2 38.4 11 Jan 8.1 +0.6 -2.2 14 Jun 1343.8 1008.6 v high 133%
Hunters Hill 16.1 -0.2 34.7 11 Jan 8.1 +0.3 -1.8 17 Aug 1687.4 1169.3 high 144%
Rutherglen Research 21.8 +0.1 42.6 12 Jan 8.0 +0.7 -3.8 13 Jun 920.8 585.1 v high 157%
Strathbogie 18.1 -0.5 39.1 11 Jan 6.6 +0.5 -5.0 28 Jun 1425.8 968.9 v high 147%
Wangaratta Aero 21.8 -0.3 43.4 12 Jan 8.3 +0.8 -3.8 14 Jun 811.0 619.1 high 131%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 14.0   30.3 12 Jan 3.3   -8.2 20 Jul 1064.6 754.1 v high 141%
Falls Creek 9.1 -0.2 25.8 11 Jan 2.8 +0.3 -7.3 25 Aug 1933.6 1221.2 v high 158%
Mount Hotham 7.7 -0.3 24.3 12 Jan 2.0 +0.1 -7.6 25 Aug 2360.0 1370.8 v high 172%
Omeo 17.9   37.9 11 Jan 5.7   -4.9 15 Jun
East Gippsland (district 84)
Combienbar AWS 18.3 +0.3 38.6 12 Jan 9.2 +0.3 1.0 16 Oct
Gabo Island Lighthouse 18.7 +0.9 32.1 9 Jan 12.7 +0.5 4.3 29 Jun 807.0 944.2 average 85%
Gelantipy 16.5 +0.1 36.0 11 Jan 7.2 +0.6 -2.5 28 Jun 954.6 738.3 v high 129%
Lakes Entrance (Eastern Beach Road) 19.6   40.6 12 Jan 10.5   -0.6 8 Aug 728.6
Mallacoota 19.6 +0.3 38.6 9 Jan 11.1 +0.4 0.9 29 Jun 833.8 926.1 average 90%
Mount Nowa Nowa 19.0 +0.1 39.3 9 Jan 10.2 +0.3 2.3 28 Jun 831.0 788.1 average 105%
Orbost 20.4   41.4 12 Jan 10.1   0.9 18 Jul 824.4 738.9 average 112%
Orbost (Comparison) 20.8 +0.6 40.6 12 Jan 9.1 +0.3 -1.0 18 Jul 827.0 845.1 average 98%
Point Hicks (Lighthouse) 19.5 +0.6 40.2 12 Jan 12.2 +0.2 4.0 8 Aug 986.6 955.6 average 103%
West Gippsland (district 85)
Bairnsdale Airport 20.5 +0.4 41.1 12 Jan 8.9 +0.7 -1.2 9 Jul 625.2 641.4 average 97%
East Sale Airport 20.3 +0.7 39.2 9 Jan 8.5 +0.4 -1.9 28 Jun 518.2 597.5 average 87%
Morwell (Latrobe Valley Airport) 20.2 +0.2 40.1 9 Jan 8.5 +0.4 -3.1 20 Jul 771.2 738.3 average 104%
Mount Baw Baw 8.7   29.0 11 Jan 2.8   -6.4 16 Oct 1882.6
Mount Moornapa 18.6 +0.2 38.1 9 Jan 9.4 +0.4 1.2 16 Oct
Noojee (Slivar) 18.7 +0.3 40.6 11 Jan 7.9 +0.8 -1.5 9 Aug
Pound Creek 19.3   38.0 31 Jan 9.4   -0.8 23 May 944.2
Wilsons Promontory Lighthouse 16.9 +0.6 36.1 11 Jan 12.4 +1.1 4.5 25 Aug 1234.8 1052.9 high 117%
Yarram Airport 19.7   39.1 9 Jan 8.4   -2.1 20 Jul 665.8
East Central (district 86)
Bundoora (Latrobe University) 20.3 +0.3 43.6 11 Jan 10.3 +0.8 0.1 9 Jul 755.7 665.2 high 114%
Cerberus 19.2 +0.2 42.7 11 Jan 10.3 +0.6 -0.3 16 Jun 854.6 719.0 high 119%
Coldstream 20.4 +0.2 42.4 11 Jan 8.2 +1.0 -3.2 9 Jul 1026.8 719.2 v high 143%
Coldstream Comparison 20.3   42.9 11 Jan 8.1   -3.3 9 Jul 1022.6
Essendon Airport 20.2 +0.7 43.4 11 Jan 10.2 +1.1 0.2 23 May 681.2 591.3 high 115%
Ferny Creek (Dunns Hill) 15.5 -0.1 37.2 11 Jan 8.7 +0.3 0.3 25 Aug
Frankston AWS 18.8 +0.3 37.8 11 Jan 12.1 +0.6 4.1 6 Jul
Melbourne Airport 20.0 +0.3 42.5 11 Jan 10.0 +0.5 1.4 22 Jun 729.8 545.4 v high 134%
Melbourne Regional Office 21.0 +1.2 43.6 11 Jan 12.1 +1.9 3.2 20 Jul 780.6 648.6 high 120%
Moorabbin Airport 19.9 +0.2 43.9 11 Jan 10.7 +0.7 0.5 22 Jun 869.2 713.8 high 122%
Rhyll 18.9 +0.4 39.0 11 Jan 12.2 +0.6 4.5 16 Oct 848.6 669.8 high 127%
Scoresby Research Institute 20.0 +0.5 42.1 11 Jan 9.9 +0.4 0.2 22 Jun 972.2 862.8 high 113%
Viewbank (ARPANSA) 20.5 -0.3 43.1 11 Jan 10.1 +0.3 0.0 20 Jul 884.2 646.0 v high 137%
Wallan (Kilmore Gap) 16.3 -0.3 39.1 11 Jan 8.3 +0.4 -0.3 25 Aug 1088.2 679.4 v high 160%
Wonthaggi 19.5 +0.7 42.6 11 Jan 10.3 +0.7 1.9 6 Jul 1131.2 934.5 high 121%
West Central (district 87)
Avalon Airport 20.3 +0.1 45.7 11 Jan 9.6 +0.4 -1.1 16 Jun 558.0 451.6 high 124%
Grovedale (Geelong Airport) 19.5 +0.2 44.9 11 Jan 9.4 +0.4 -0.4 16 Jun 584.2 524.3 average 111%
Laverton RAAF 20.1 +0.4 44.7 11 Jan 10.2 +1.0 0.1 23 May 613.0 539.9 high 114%
Sheoaks 18.9 +0.3 42.5 11 Jan 8.6 +0.3 -1.1 16 Jun 641.2 491.3 high 131%
North Central (district 88)
Castlemaine Prison 19.4 -0.4 41.6 11 Jan 8.2 +0.6 -2.9 6 Jul 962.4 602.4 v high 160%
Eildon Fire Tower 17.2 -0.7 38.6 11 Jan 8.6 +0.2 -0.9 16 Oct 1198.8 632.1 v high 190%
Lake Eildon 20.6 +0.2 41.3 11 Jan 8.8 +0.9 -1.1 14 Jun 1284.3 852.2 v high 151%
Mangalore Airport 21.0 0.0 42.9 11 Jan 8.9 +0.6 -3.4 28 Jun 895.4 572.2 v high 156%
Maryborough 20.3 -0.2 42.8 11 Jan 8.6 +0.6 -2.2 28 Jun 950.7 528.5 v high 180%
Redesdale 20.0 -0.2 42.0 11 Jan 7.6 +0.4 -3.6 28 Jun 1098.0 579.3 highest 190%
Western Plains (district 89)
Ararat Prison 19.3 +0.3 40.7 11 Jan 7.6 +0.7 -4.1 23 May 812.7 592.4 v high 137%
Ballarat Aerodrome 17.6 +0.2 39.9 11 Jan 7.5 +0.5 -2.8 9 Jul 879.6 694.7 v high 127%
Westmere 19.2   44.2 11 Jan 7.4   -3.2 23 May 748.0
West Coast (district 90)
Aireys Inlet 18.1 0.0 40.1 31 Dec 10.8 +0.3 3.3 16 Oct 767.6 624.7 high 123%
Cape Nelson Lighthouse 17.5 0.0 42.4 11 Jan 11.5 +0.1 3.0 7 Sep 727.4 696.8 average 104%
Cape Otway Lighthouse 16.9 -0.4 35.5 11 Jan 11.3 +0.7 4.5 16 Jun 1065.0 895.9 v high 119%
Casterton 19.5   42.4 11 Jan 8.3   -1.9 27 Jun 757.0
Casterton Showgrounds     42.5 11 Jan 8.3 0.0 -3.0 27 Jun 799.3 656.1 high 122%
Colac (Mount Gellibrand) 17.7   43.9 11 Jan 8.8   1.4 25 Aug 701.4 531.3 v high 132%
Dartmoor 19.5   44.2 11 Jan 8.6   -0.9 6 Jul 830.6
Hamilton Airport 18.9 -0.2 43.3 11 Jan 7.8 +0.3 -1.4 27 Jun 736.6 617.6 high 119%
Mortlake Racecourse 19.0 -0.1 44.0 11 Jan 7.8 +0.4 -1.9 22 May 830.8 575.2 v high 144%
Port Fairy AWS 18.4 -0.1 44.3 11 Jan 10.3 0.0 1.6 16 Jun 838.0 675.5 high 124%
Portland (Cashmore Airport) 17.5 0.0 40.8 11 Jan 9.3 +0.1 0.7 23 May 991.6 820.3 high 121%
Warrnambool Airport NDB 18.6 -0.4 44.0 11 Jan 8.6 +0.3 -0.4 6 Jul 944.4 721.8 v high 131%
Weeaproinah 14.7 +0.3 38.1 11 Jan 8.1 +0.3 0.8 20 Aug 2327.8 1936.0 high 120%

Notes

A Annual 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 8 am on Tuesday 4 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