Victoria in December 2017: A wet start to the month and warm nights

Victoria in December was wetter than average, largely due to record rainfall at the start of the month. Many locations across the State set daily rainfall records for December during this event. Warmer than average temperatures, especially around the middle of the month led to a warmer than average month for maximum and minimum temperatures, with overnight temperatures the eighth warmest on record for December.

Record December rainfall

Cool start to the month then warm

  • After a cooler than average start to the month associated with the record rainfall event, temperatures then warmed, with the 13th the warmest day of the month.
  • Large areas across southeastern Victoria had the warmest December on record for minimum temperatures.
  • Many sites saw or equalled their highest December mean daily minimum temperature on record. This included Wilsons Promontory Lighthouse which had the warmest December on record for overnight temperatures in its 139 year history.
  • Swan Hill Aerodrome had its coldest December day (lowest maximum temperature) in its 22 year history on the 2nd of December.
  • Bairnsdale Airport had its warmest December night (highest daily minimum temperature) on record on the 14th.
  • Much of the State saw warmer than average daytime temperatures for the month, especially in eastern districts.
  • Minimum temperatures were also generally warmer than average across much of the State with the warmest nights on average state-wide on the 19th and 28th.

Severe weather affected the State on the 19th

  • As well as the record rainfall at the start of the month severe thunderstorms extended eastwards across most of central and eastern Victoria during the afternoon and evening of the 19th.
  • Damaging winds, including gusts of above 100 km/h, were reported at sites such as Wallan, Bendigo Airport and Wangaratta. It was reported that a truck rolled in the high-wind conditions on the Hume Highway between Benalla and Glenrowan.
  • A large number of reports of hail of 2-5 cm in diameter were received from northern and eastern suburbs in Melbourne.

Further information

Media
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Enquiries

Extremes in December 2017
Hottest day 42.5 °C at Longerenong on the 13th
Warmest days on average 31.2 °C at Mildura Airport
Coolest days on average 14.8 °C at Mount Hotham
Coldest day 3.6 °C at Mount Baw Baw on the 3rd
Coldest night -1.7 °C at Mount Hotham on the 4th
Coolest nights on average 7.1 °C at Mount Baw Baw
Warmest nights on average 16.0 °C at Mildura Airport
Warmest night 28.8 °C at Mildura Airport on the 19th
Warmest on average overall 23.6 °C at Mildura Airport
Coolest on average overall 11.0 °C at Mount Hotham
Wettest overall 330.2 mm at Toolangi (Mount St Leonard DPI)*
Driest overall 12.3 mm at Gatum
Wettest day 182.2 mm at Gooram (Hillside) on the 2nd
Strongest wind gust 117 km/h at Wallan (Kilmore Gap) on the 19th

* note: there are missing data from the end of the month at this site so the final December total may be even higher



Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest December daily rainfall
New record
(mm)
Old
record
Years of
record
Echuca Aerodrome 123.0 on the 2nd 77.5 on the 28th in 1903 136
Beechworth Composite 110.6 on the 2nd 102.0 on the 26th in 1988 132
Euroa 146.0 on the 2nd 59.0 on the 22nd in 2007 131
Murchison 146.8 on the 2nd 63.5 on the 15th in 1947 130
Lake Eildon 148.6 on the 2nd 75.7 on the 1st in 1934 127
Woods Point 138.0 on the 1st 120.7 on the 1st in 1934 127
Wooragee 81.0 on the 2nd 66.0 on the 7th in 1930 118
Molka (Lowana) 110.4 on the 2nd 58.9 on the 7th in 1930 116
Barnawartha 84.0 on the 2nd 73.9 on the 23rd in 1964 113
Mincha 60.0 on the 2nd 59.0 on the 11th in 2004 112
Highlands (Glentannar) 120.0 on the 2nd 108.0 on the 7th in 1930 103
Strathbogie 164.6 on the 2nd 80.8 on the 14th in 1966 102
Eurobin 118.2 on the 2nd 85.6 on the 26th in 1988 95
Nagambie (Goulburn Weir) 93.4 on the 2nd 83.1 on the 8th in 1930 95
Stanhope 128.8 on the 2nd 88.8 on the 30th in 2016 94
Tatura Inst Sustainable Ag 72.6 on the 2nd 58.7 on the 4th in 1954 76
Cobram (Goulburn Murray) 61.2 on the 2nd 59.0 on the 26th in 1978 59
Mangalore Airport 68.2 on the 2nd 51.8 on the 31st in 1991 57
Kyabram 65.6 on the 2nd 43.8 on the 9th in 1988 54
Burrowye Station 61.0 on the 2nd 60.0 on the 3rd in 1980 49
Murchison (Arcadia (Sunnyville)) 71.0 on the 2nd 68.0 on the 31st in 1991 49
Tutye (Bunurouk) 65.0 on the 1st =65.0 on the 8th in 2010 49
Buxton 81.8 on the 2nd 56.6 on the 22nd in 2007 48
Strath Creek 88.0 on the 2nd 72.2 on the 22nd in 2007 36
Mount Buller 138.6 on the 2nd 102.8 on the 9th in 2010 35
Rushworth (Raglus) 87.0 on the 2nd 81.4 on the 31st in 1991 32
Cape Liptrap (Illawong) 54.0 on the 2nd 40.0 on the 27th in 1998 26
Kinglake West 98.0 on the 3rd 56.4 on the 28th in 1999 26
Coldstream 50.0 on the 2nd 47.4 on the 26th in 2011 24
Falls Creek 114.2 on the 2nd 106.2 on the 30th in 2016 24
Hunters Hill 84.0 on the 2nd 68.2 on the 17th in 1999 24
Murderers Hill 60.4 on the 2nd 44.0 on the 6th in 1995 24
Wallan (Kilmore Gap) 47.2 on the 2nd 45.8 on the 22nd in 2007 24
Maffra 49.0 on the 2nd 32.7 on the 9th in 2010 23
Acheron River @ Taggerty 114.2 on the 2nd 58.2 on the 8th in 2010 22
Eildon Fire Tower 128.8 on the 2nd 39.0 on the 9th in 2010 22
Mount Tamboritha 83.2 on the 2nd 59.2 on the 9th in 2010 22
Shepparton Airport 60.0 on the 2nd 40.6 on the 9th in 2010 22
Swan Hill Aerodrome 42.2 on the 2nd 30.2 on the 28th in 1999 22



Record highest December total rainfall
New record
(mm)
Old
record
Years of
record
Average for
December
Euroa 186.8 185.9 in 1930 131 43.3
Murchison* 190.0 153.2 in 1930 130 36.6
Lake Eildon 214.6 180.8 in 1930 128 57.2
Barnawartha 128.6 127.7 in 1975 114 39.8
Stanhope 181.0 171.0 in 1930 96 34.0
Kyabram 111.0 93.7 in 1992 54 33.8
Myrtleford (Ovens Research Station) 171.8 169.2 in 1975 51 72.0
Cranbourne South 138.8 137.9 in 1993 50 64.2
Yanakie (Shallow Inlet) 132.8 117.8 in 1978 47 58.7
Murchison (Arcadia (Sunnyville)) 148.0 112.2 in 1992 46 39.3
Buxton 160.0 154.0 in 1973 45 68.4
Glen Waverley (Golf Course) 198.2 178.6 in 1993 42 79.1
Strath Creek 159.2 126.4 in 1988 36 55.6
Mount Buller 280.6 274.2 in 2010 35 101.8
Cranbourne Botanic Gardens 145.0 133.6 in 1993 28 67.9
Noojee Forestry 158.2 156.2 in 1992 28 90.5
Kinglake West 239.4 187.8 in 1991 26 87.9
Cape Liptrap (Illawong) 120.5 118.4 in 1993 25 57.2
Coldstream 183.6 145.6 in 2010 24 60.0
Acheron River @ Taggerty 223.4 159.0 in 2010 22 60.3
Eildon Fire Tower 195.6 122.8 in 2010 22 49.7
Mount Tamboritha 179.2 149.2 in 1999 22 77.5
Swan Hill Aerodrome 53.0 47.2 in 2008 21 22.0
Vesper 196.9 169.0 in 2011 20 110.8

* note: there are missing data from the end of the month at this site so the final December total may be even higher


Highest December total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Average for
December
Woods Point 246.2 302.2 in 1887* 101.8
Echuca Aerodrome 147.0 180.1 in 1930 30.0
Highlands (Glentannar) 200.0 226.0 in 1930 56.7
Molka (Lowana) 140.2 153.5 in 1930 35.5
Eurobin 196.0 258.6 in 1933 71.0
Giffard 160.6 177.1 in 1935* 52.7
Essendon Airport 150.4 152.7 in 1933* 52.3
Marysville (Post Office) 199.8 214.6 in 1947* 89.2
Moorabbin Airport 134.4 146.6 in 1954* 60.5
Strathbogie 227.6 241.3 in 1966* 58.2
Yea 129.4 156.5 in 1966* 47.1
Mansfield (Post Office)** 204.8 263.3 in 1966* 51.4
Avenel (Post Office) 119.8 144.0 in 1966* 39.9
Dargo 169.2 178.3 in 1968* 69.7
Wilsons Promontory Lighthouse 124.6 131.0 in 1970 64.3
Darriman (Tarralangi) 160.6 210.2 in 1970* 63.2
Mount Best (Upper Toora) 182.2 231.6 in 1970* 85.1
Fish Creek (Hoddle Range) 142.0 151.8 in 1985 70.9
Mangalore Airport 113.4 119.4 in 1985 41.1
Willow Grove 149.3 191.0 in 1985* 76.8
Beechworth Composite 198.2 212.0 in 1988 61.9
Fish Creek 130.2 152.0 in 1985* 67.6
Tabilk (Tahbilk Winery) 114.8 134.6 in 1985* 41.1
Morwell (Latrobe Valley Airport) 146.2 155.0 in 1992 68.7
Flemington Racecourse 144.7 151.8 in 1992* 53.7
Jindivick 151.2 177.8 in 1993 97.8
Kinglake West (Wallaby Creek) 228.6 254.4 in 1993 88.0
Korumburra 145.2 165.9 in 1991* 83.5
Seaspray (Burong) 145.0 156.8 in 1992* 56.5
Walhalla 168.0 237.4 in 1992* 105.5
Bonbeach (Carrum) 118.3 127.8 in 1993* 56.6
Boundary Bend** 76.7 79.0 in 1992* 24.1
Rushworth (Raglus) 136.4 156.2 in 1992* 49.0
Scoresby Research Institute 163.8 186.6 in 1993* 76.5
Swifts Creek 110.9 162.4 in 1988* 62.2
Montrose 191.0 212.0 in 1985* 81.6
Point Hicks (Lighthouse) 133.5 224.6 in 1995* 72.7
Tarwin Lower (Riverside) 95.8 113.8 in 1993* 64.5
Eltham 142.8 146.6 in 1993* 66.0

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported

** note: there are missing data from the end of the month at this site so the final December total may be even higher




Record lowest December daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Swan Hill Aerodrome 17.2 on the 2nd 18.8 on the 19th in 2010 22 30.5



Record highest December daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Bairnsdale Airport 21.4 on the 14th 21.3 on the 24th in 2012 37 11.2



Record highest December mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Wilsons Promontory Lighthouse 15.1 14.7 in 2007 139 12.7
Laverton RAAF 14.1 = 14.1 in 1965 74 12.0
Point Hicks (Lighthouse) 15.6 15.5 in 1975 48 14.2
Moorabbin Airport 14.6 14.3 in 2015 46 12.7
Wonthaggi 14.0 13.6 in 1988 46 11.7
Morwell (Latrobe Valley Airport) 12.9 = 12.9 in 1988 32 11.2
Aireys Inlet 13.5 = 13.5 in 2011 26 12.3
Rhyll 15.3 15.2 in 2015 26 13.7
Mallacoota 15.6 14.9 in 2016 24 13.6
Mount Moornapa 13.0 = 13.0 in 2015 24 11.3
Coldstream 12.0 11.5 in 2007 23 9.7
Avalon Airport 13.4 12.9 in 2015 22 11.8
Cape Nelson Lighthouse 14.3 = 14.3 in 2011 22 13.1
Mount Nowa Nowa 14.0 13.9 in 2015 22 12.1

Highest December mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
December
Bairnsdale Airport 13.2 13.3 in 1988 11.2
East Sale 13.6 13.7 in 1992 11.3
Gelantipy 11.2 12.0 in 1992 9.5
Sheoaks 11.7 12.2 in 1992 10.3
Cranbourne Botanic Gardens 13.3 13.4 in 1994 11.7
Hunters Hill 13.8 14.1 in 1994 11.9



Record highest December mean temperature
New record
(°C)
Old
record
Years of
record
Average for
December
Point Hicks (Lighthouse) 19.9 = 19.9 in 2015 48 18.1
Mallacoota 19.6 19.4 in 2016 24 17.9



Summary statistics for December 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
December
2017
Diff
from
average
Highest for
December
2017
Mean for
December
2017
Diff
from
average
Lowest for
December
2017
Total for
December
2017
Average
for
December
Rank of
December
2017
Fraction of
December
average
North Mallee (district 76)
Mildura Airport 31.2 +0.9 41.2 13th 16.0 +1.1 8.1 8th 45.0 25.3 high 178%
Ouyen (Post Office) 30.3 0.0 41.7 13th 14.9 +1.2 7.6 8th 43.2 25.3 high 171%
Walpeup Research 30.9 +1.0 42.1 13th 13.7 +0.1 6.3 8th 26.8 24.1 average 111%
South Mallee (district 77)
Hopetoun Airport 30.4 -0.1 42.0 13th 13.3 +0.3 6.5 8th 29.4 26.2 average 112%
Swan Hill Aerodrome 30.8 +0.3 40.8 13th 15.2 +1.6 9.0 8th 53.0 22.0 highest 241%
North Wimmera (district 78)
Kellalac (Warracknabeal Airport) 29.4   41.5 13th 12.4   6.2 5th 26.2
Nhill Aerodrome 28.1 -0.9 40.6 13th 12.0 -0.2 6.0 5th 25.8 27.3 average 95%
Warracknabeal Museum 29.4 +0.6 40.5 13th 12.9 +0.7 6.5 8th 28.8 26.9 average 107%
South Wimmera (district 79)
Edenhope Airport 25.8 -1.1 39.1 13th 11.0 0.0 5.3 8th 35.2 39.2 average 90%
Grampians (Mount William) 18.2 -0.1 30.4 13th 8.5 +0.9 2.3 3rd 54.2 64.9 average 84%
Horsham Aerodrome 28.3 -0.3 41.5 13th 11.0 +0.5 4.7 5th 26.6 25.4 average 105%
Kanagulk 26.4 -0.9 39.4 13th 10.9 +0.2 5.1 8th 17.0 41.2 v low 41%
Longerenong 29.2 +1.4 42.5 13th 11.5 +0.3 3.5 8th 23.2 27.8 average 83%
Pyrenees (Ben Nevis) 22.5 +0.3 34.0 13th 10.5 +0.4 3.6 3rd 39.4 45.2 average 87%
Stawell Aerodrome 26.7 +0.1 39.7 13th 12.4 +1.1 4.9 8th 24.8 34.9 average 71%
Lower North (district 80)
Charlton 30.3 +0.5 40.9 13th 13.5 +0.5 7.7 8th 28.0 30.8 average 91%
Echuca Aerodrome 30.2 +1.2 39.4 13th 14.7 +1.2 9.0 4th 147.0 30.0 v high 490%
Kerang 30.9 +1.2 39.8 13th 15.4 +2.0 9.4 4th
Kyabram 29.8 +1.6 38.5 13th 14.5 +2.0 8.6 9th 111.0 33.8 highest 328%
Upper North (district 81)
Bendigo Airport 28.6 +1.2 37.7 13th 13.6 +1.7 7.2 9th 37.6 39.5 average 95%
Shepparton Airport 29.3 +0.3 38.1 19th 14.7 +2.0 8.6 9th 79.0 34.2 high 231%
Tatura Inst Sustainable Ag 28.6 +1.0 38.4 19th 14.3 +2.0 7.6 9th 101.2 35.3 v high 287%
Yarrawonga 30.8 +0.7 38.3 13th 14.8 +1.5 8.2 9th 76.4 40.8 high 187%
Lower Northeast (district 82)
Benalla Airport 29.1 +0.1 37.7 19th 14.4 +1.3 7.5 9th 116.4 54.6 high 213%
Corryong Airport 29.1 +0.1 36.6 19th 13.3 +1.9 7.0 1st 128.8 68.0 v high 189%
Dartmouth Reservoir 27.4 +0.6 34.6 19th 13.8 +2.1 7.0 9th 148.0 74.6 v high 198%
Hunters Hill 23.6 +0.8 31.4 19th 13.8 +1.9 5.6 4th 161.2 81.3 high 198%
Rutherglen Research 30.4 +1.2 38.0 13th 13.0 +1.5 5.7 9th 103.4 44.4 v high 233%
Strathbogie 25.4 +0.7 32.7 13th 10.8 +1.4 3.8 9th 227.6 58.2 v high 391%
Wangaratta Aero 29.8 +0.7 37.5 19th 13.2 +1.5 6.8 9th 95.0 45.3 high 210%
Upper Northeast (district 83)
Falls Creek 15.6 +0.5 21.8 19th 8.1 +1.9 -0.5 4th
Mount Buller 15.4 +0.8 21.8 19th 7.8 +1.6 -1.1 4th 280.6 101.8 highest 276%
Mount Hotham 14.8 +1.1 21.7 19th 7.2 +1.7 -1.7 4th 190.8 126.2 high 151%
Omeo 24.9 +0.8 32.4 19th 10.8 +2.0 4.2 9th 124.8 66.2 high 189%
East Gippsland (district 84)
Combienbar AWS 24.1 +1.0 36.0 19th 12.9 +1.6 6.9 4th
Gabo Island Lighthouse 21.7 +1.8 26.6 23rd     11.3 9th 78.0 66.7 average 117%
Gelantipy 22.6 +1.2 32.0 19th 11.2 +1.7 4.9 4th
Lakes Entrance (Eastern Beach Road) 24.2 +1.4 36.2 19th 15.2 +2.2 11.0 9th 121.4 68.9 high 176%
Mallacoota 23.6 +1.4 32.5 19th 15.6 +2.0 9.2 9th 76.6 70.2 average 109%
Mount Nowa Nowa 23.6 +1.0 36.7 19th 14.0 +1.9 8.6 4th 113.8 84.3 high 135%
Orbost 25.0 +1.0 35.4 19th     9.0 9th 86.0 67.3 average 128%
Point Hicks (Lighthouse) 24.2 +2.1 32.6 19th 15.6 +1.4 11.0 9th 133.5 72.7 v high 184%
West Gippsland (district 85)
Bairnsdale Airport 24.8 +1.1 38.2 19th 13.2 +2.0 7.1 25th 127.4 61.5 v high 207%
Corner Inlet (Yanakie) 22.1   30.6 27th 13.6   9.3 16th 122.0
East Sale 24.7 +1.2 35.4 13th 13.6 +2.3 8.9 9th 118.6 55.0 v high 216%
East Sale Airport 25.2   35.8 13th 13.8   9.3 25th 137.0
Morwell (Latrobe Valley Airport) 25.4 +1.0 35.6 13th 12.9 +1.7 8.7 31st 146.2 68.7 v high 213%
Mount Baw Baw 15.2 +0.8 24.0 19th 7.1 +1.3 -0.4 8th 247.6 146.2 high 169%
Mount Moornapa 24.6 +1.5 37.6 19th 13.0 +1.7 7.8 4th 164.8 64.1 v high 257%
Nilma North (Warragul) 24.5   35.2 13th 12.8   8.0 5th 111.6
Pound Creek 22.9 +0.1 35.7 19th 12.8 +1.5 7.1 26th 119.4 62.7 v high 190%
Wilsons Promontory Lighthouse 20.0 +1.2 29.2 13th 15.1 +2.4 11.0 4th 124.6 64.3 v high 194%
Yarram Airport 23.9 +0.3 34.8 19th 12.8 +1.6 6.8 26th 137.6 60.5 v high 227%
East Central (district 86)
Coldstream 26.1 +0.9 35.5 13th 12.0 +2.3 6.6 26th 183.6 60.0 highest 306%
Cranbourne Botanic Gardens 24.6 +1.1 36.4 13th 13.3 +1.6 9.8 5th 145.0 67.9 highest 214%
Essendon Airport 25.6 +1.1 38.5 19th 13.9 +2.0 9.3 5th 150.4 52.3 v high 288%
Ferny Creek 21.9   32.2 13th 11.7   6.9 8th 247.2
Frankston AWS 23.3 +0.8 35.8 13th 15.1 +1.3 11.5 8th
Melbourne (Olympic Park) 25.0   37.6 13th 15.2   10.8 5th 128.4
Melbourne Airport 25.6 +1.0 38.3 19th 13.3 +1.3 9.0 8th 118.8 50.4 v high 236%
Moorabbin Airport 24.7 +0.7 37.3 13th 14.6 +1.9 9.9 5th 134.4 60.5 v high 222%
Rhyll 22.9 +1.1 34.0 13th 15.3 +1.6 12.0 4th 75.4 45.2 v high 167%
Scoresby Research Institute 25.5 +1.4 36.6 13th 13.2 +1.3 7.8 7th 163.8 76.5 v high 214%
Viewbank 26.3 +0.6 37.7 19th 13.7 +1.0 9.0 5th 155.2 70.6 v high 220%
Wonthaggi 23.0 +0.9 36.2 13th 14.0 +2.3 10.0 15th 122.4 61.3 v high 200%
West Central (district 87)
Avalon Airport 25.4 +1.0 40.8 19th 13.4 +1.6 7.7 5th 47.2 29.8 high 158%
Breakwater (Geelong Racecourse) 24.6   38.6 13th 13.8   8.6 5th 40.8
Laverton RAAF 24.8 +1.0 39.1 19th 14.1 +2.1 9.3 7th 82.2 46.1 high 178%
Sheoaks 25.2 +1.5 37.8 13th 11.7 +1.4 5.2 5th 32.2 31.0 average 104%
North Central (district 88)
Castlemaine Prison 27.0 +1.5 36.1 13th 12.6 +1.7 6.2 8th 63.0 40.6 high 155%
Eildon Fire Tower 24.5 +0.6 32.9 13th 12.6 +1.3 6.9 4th 195.6 49.7 highest 394%
Lake Eildon 27.9 +1.5 36.6 13th 12.9 +1.9 6.5 4th 214.6 57.2 highest 375%
Mangalore Airport 28.2 +1.1 36.7 13th 14.1 +2.2 8.1 9th 113.4 41.1 v high 276%
Maryborough 27.2 +0.5 38.5 13th 12.6 +1.3 7.6 8th 37.8 37.2 average 102%
Redesdale 28.3 +1.5 38.3 13th     5.5 9th 41.2 37.5 average 110%
Wallan (Kilmore Gap) 23.6 +1.4 33.8 19th 11.7 +1.5 6.7 8th 109.4 47.2 v high 232%
Western Plains (district 89)
Ararat Prison 25.9 +1.2 37.5 13th 10.3 +0.9 5.0 31st 41.0 37.9 average 108%
Ballarat Aerodrome 24.1 +1.4 35.3 13th 11.0 +1.6 5.5 8th 60.2 50.0 high 120%
Westmere 25.6 -0.2 39.0 13th 10.5 +1.3 4.3 31st 47.0 43.7 average 108%
West Coast (district 90)
Aireys Inlet 23.2 +1.9 39.0 13th 13.5 +1.2 9.4 8th 37.0 39.4 average 94%
Cape Nelson Lighthouse 21.1 +1.3 36.3 13th 14.3 +1.2 10.7 15th 40.8 40.8 average 100%
Cape Otway Lighthouse 20.6 +0.7 35.7 13th 13.9 +1.9 9.3 12th 35.6 52.7 low 68%
Casterton 25.1 -0.2 37.4 13th 10.2 +0.1 4.7 8th 25.0 41.1 average 61%
Colac (Mount Gellibrand) 23.9 +0.5 38.6 13th 12.1 +1.4 7.2 8th 26.8 35.8 average 75%
Dartmoor 25.5   38.5 13th 11.4   6.4 12th 18.8
Hamilton Airport 24.4 +0.3 37.6 13th 10.6 +1.1 5.7 8th 34.0 43.5 average 78%
Mortlake Racecourse 24.3 +0.8 40.3 13th 9.6 +0.4 4.1 12th 24.4 41.2 average 59%
Port Fairy AWS 22.0 +0.7 38.2 13th 13.4 +0.9 9.0 15th 31.6 40.4 average 78%
Portland (Cashmore Airport) 21.1 +0.8 36.2 13th 12.2 +1.3 7.8 12th 45.4 49.9 average 91%
Warrnambool Airport NDB 22.5 -0.2 38.1 13th 11.3 +1.2 5.6 12th 44.0 47.0 average 94%

Notes

The Monthly climate summary, generally published on the first working day of each month, lists 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. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This statement has been prepared based on information available at 9 am on Tuesday 9 January 2018. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites 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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
Enquiries