Victoria in October 2010: Wet conditions statewide

  • Above average rainfall in central and northern Victoria
  • Typical October days
  • Normal night-time temperatures

Rainfall

In what is shaping up to be Victorias wettest year since 1992, Gippsland has been experiencing particularly dry conditions. However, this month many Gippsland stations recorded rainfall in excess of 100 mm, with Mount Nowa Nowa and Gelantipy both almost double their long-term averages.

Consistent rain across the northern and central regions of the State resulted in above, or very much above average rainfall this month. A north-west cloudband combined with a frontal system on the 6th and 7th to bring several millimetres of welcome rain to the farmers attending the Elmore Field days in the States north.

Several troughs across mainland Australia, and a particularly deep and strongly ridging low pressure system, passed across the Victorian region in mid-October, resulting in substantial rainfalls for much of the State. The centre of the low pressure system penetrated well inland, moving slowly over central and eastern Victoria on the 15th. Regular rainfall between the 13th and 17th brought up to 25 mm to most locations, with up to 100 mm falling in the north east district in the 24hours till 9am on the 16th. In fact, Nariel Creek (Simpson) received 88mm in just one day associated with this system, and was also the wettest location this month with 286.2mm.

Some regions in the Wimmera, close to the State border, received less rain than usual, with a major rainfall event on the 30th and 31st bringing the monthly totals closer to what is typically expected in October. In fact, some stations recorded their highest daily October rainfall on record in this event, with Moorabbin Airport (72.0mm) and Kyneton (70.6mm) receiving the equivalent of a typical Octobers rainfall in just one day.

Temperature

Maximum temperature

After particularly cool start to spring, daytime temperatures this month were very close to the climatological average. Temperatures in excess of 25 C were recorded across the state on numerous occasions, with the northwest consistently observing temperatures in the high twenties.

The warmest days across the State were the 22nd and 29th. On both occasions, temperatures soared above 25 C as a result of strong dry northerly winds associated with a slow moving high pressure system. Mildura Airport and Ouyen Post Office both registered a summery daily maximum of 31.6 C on the 22nd, whilst the hottest day was 32.8 C at Mildura Airport on the 29th.

Minimum temperature

Cool overnight temperatures and a large low pressure system over Victoria on the 15th and 16th, brought post-ski season snow to the Alpine region, with snow observed at both Noojee and Strathbogie on the 16th. Mount Hotham was the coolest location of the month, averaging nightly temperatures of just 1.3 C and a frosty -7.6 C on the 16th.

Several particularly cool nights this month kept minimum temperatures close to the long-term average. The warmest nights were the 12th, 30th and 31st, due to warm northerly flow and pre-frontal cloud keeping temperatures well above normal. Melbourne Regional Office experienced night-time temperatures over 18 C on the 12th and 30th, whilst Point Hicks Lighthouse observed 19.0 C overnight on the 31st. Although Gabo Island Lighthouse achieved October nights right on their long term average of 11.5 C; these night-time temperatures were the warmest on average across the State.

Wind

Windy conditions on the last weekend of the month, associated with the passage of a strongly ridging system, resulted in wind gust of up to 139 km/h recorded at Mount Hotham on both the 30th and 31st.

Further information

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Extremes in October 2010
Hottest day 32.8 C at Mildura Airport on the 29th
Warmest days on average 23.5 C at Mildura Airport
Coolest days on average 7.6 C at Mount Hotham
Coldest day -1.8 C at Mount Buller on the 16th
Coldest night -7.6 C at Mount Hotham on the 16th
Coolest nights on average 1.3 C at Mount Hotham
Warmest nights on average 11.5 C at Gabo Island Lighthouse
Warmest night 19.0 C at Point Hicks (Lighthouse) on the 31st
Wettest overall 286.2 mm at Nariel Creek (Simpson)
Wettest day 130.2 mm at Mount Hotham on the 31st
Highest wind gust 139 km/h at Mount Hotham on the 30th
139 km/h at Mount Hotham on the 31st

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 October rainfall
Total rainfall
for October 2010 (mm)
Previous highest
for October
Years of
record
Average for
October
Chiltern (Post Office) 184.1 181.0 in 1975 126 65.8
Nariel Creek (Simpson) 286.2 261.8 in 1917 125 101.0
Rutherglen Research 179.4 156.3 in 1975 98 59.0
Mitta Mitta Forestry 238.0 221.6 in 1986 58 101.3
Bonbeach (Carrum) 136.6 136.2 in 1964 51 70.0
Beechworth Woolshed 171.8 149.2 in 1993 24 68.4
Avoca (Homebush) 122.0 99.6 in 1992 23 44.3
Bendigo Airport 137.6 111.2 in 1992 20 44.0

Highest total October rainfall for at least 20 years
Total rainfall
for October 2010 (mm)
Most recent October
this high or higher
Years since
higher
Average for
October
Hume Reservoir 202.6 214.7 in 1949 61 69.9
Dartmouth Reservoir 235.4 258.8 in 1934 41 101.6
Burrowye Station 203.8 210.9 in 1974 35 78.6
Canary Island 119.8 128.6 in 1975 35 36.2
Castlemaine Prison 146.2 200.7 in 1975 35 60.3
Dunolly 112.6 204.8 in 1975 35 47.0
Laverton RAAF 115.8 165.4 in 1975 35 57.4
Melbourne Airport 128.8 143.8 in 1975 35 54.9
Melbourne Regional Office 135.2 150.2 in 1975 35 66.3
Natte Yallock 118.7 159.2 in 1975 35 45.0
Raywood 129.4 165.2 in 1975 35 40.0
Toorourrong Reservoir (Toorourrong) 149.6 189.0 in 1975 35 80.1
Annuello 84.0 96.0 in 1976 34 31.6
Cheltenham Kingston Centre 157.0 172.1 in 1975 34 75.5
Cobram (Goulburn Murray) 97.2 185.1 in 1975 34 40.7
Kyneton 152.2 239.8 in 1975 34 72.2
Mildura Airport 92.2 105.2 in 1976 34 30.5
Mitcham 133.2 159.4 in 1975 34 83.9
Preston Reservoir 140.4 185.0 in 1975 34 66.7
Redesdale 151.4 177.2 in 1975 34 53.0
Tatura Inst Sustainable Ag 110.2 170.9 in 1975 34 48.2
Moorabbin Airport 163.6 165.4 in 1975 33 71.0
Yan Yean 126.4 154.0 in 1975 33 67.3
Lancefield 133.6 223.4 in 1975 32 67.7
Tungamah 135.0 148.2 in 1975 31 49.1
Bundoora (Latrobe University) 122.4 123.9 in 1983 27 65.2
Avalon Airport 101.0 144.0 in 1975 25 49.8
Boort 129.0 146.0 in 1975 25 39.9
Ararat Prison 88.2 147.0 in 1986 24 58.1
Strath Creek 131.2 141.2 in 1986 24 61.3
Skipton Post Office 111.2 119.2 in 1986 21 60.8
Lilydale 149.2 157.8 in 1989 20 90.9



Highest October mean daily minimum temperature for at least 20 years
Mean daily minimum
temperature
for October 2010 (C)
Most recent October
this high or higher
Years since
higher
Average for
October
Rutherglen Research 7.4 8.7 in 1973 37 6.2



Summary statistics for October 2010
Maximum temperatures
for October
(C)
Minimum temperatures
for October
(C)
Rainfall
for October
(millimetres)
Mean for
October
2010
Diff
from
average
Highest for
October
2010
Mean for
October
2010
Diff
from
average
Lowest for
October
2010
Total for
October
2010
Average
for
October
Rank of
October
2010
Fraction of
October
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 20.8 -0.7 25.9 5th 9.2 +1.4 4.1 1st 154.8 54.4 v high 285%
Hume Reservoir 21.3 +0.4 26.3 5th 10.5 +1.4 3.7 1st 202.6 69.9 v high 290%
North Mallee (district 76)
Mildura Airport 23.5 -0.3 32.8 29th 10.2 +0.4 3.9 7th 92.2 30.5 v high 302%
Ouyen (Post Office) 23.4 -0.3 32.0 29th 9.3 +0.5 3.6 16th 71.2 35.2 high 202%
Walpeup Research 23.3 +0.2 32.3 29th 9.0 +0.2 1.1 7th 60.4 34.0 high 178%
South Mallee (district 77)
Hopetoun Airport 22.8   32.6 29th 7.7   1.4 8th 54.4
Swan Hill Aerodrome 23.0 -0.8 31.3 29th 8.2 +0.4 2.5 2nd 91.8 24.2 v high 379%
North Wimmera (district 78)
Nhill Aerodrome 21.4   31.1 29th 7.0   1.5 7th 38.6
Warracknabeal Museum 21.4 -0.4 31.2 29th 7.4 -0.2 1.8 1st 44.2 39.4 average 112%
South Wimmera (district 79)
Edenhope Airport 19.9   30.2 29th 7.8   1.5 24th 31.0
Grampians (Mount William) 11.4   19.7 22nd 3.3   -3.3 16th 109.2
Horsham Aerodrome 20.5 -0.9 30.3 29th 6.0 +0.7 0.8 1st 67.6 35.1 high 193%
Horsham Polkemmet Rd 21.0 0.0 30.8 29th 6.2 -0.9 1.1 1st 54.0 43.7 average 124%
Kanagulk 19.6   30.6 29th 6.5   2.0 7th 46.0
Longerenong 20.8 0.0 31.1 29th 6.5 -0.2 0.9 7th 48.8 42.1 average 116%
Pyrenees (Ben Nevis) 13.6   22.3 22nd 4.7   -2.6 16th 109.6
Stawell Aerodrome 19.3 -0.3 28.1 29th 7.7 +0.5 2.5 25th 81.0 38.2 high 212%
Lower North (district 80)
Charlton 21.3   29.9 22nd 7.5   1.6 1st 84.2
Echuca Aerodrome 21.4 -0.6 29.2 22nd 8.1 -0.6 1.6 1st 112.0 42.9 v high 261%
Kerang 22.5 -0.2 30.6 22nd 9.3 +0.5 3.7 16th 88.6 37.9 v high 234%
Kyabram DPI 21.1 -0.1 28.2 22nd 7.5 0.0 0.9 1st 70.0 41.3 high 169%
Upper North (district 81)
Bendigo Airport 20.1 -0.2 27.5 22nd 7.7 +1.4 1.8 9th 137.6 44.0 highest 313%
Shepparton Airport 20.6 -1.1 27.4 22nd 8.1 +1.0 1.1 1st 104.4 36.8 v high 284%
Tatura Inst Sustainable Ag 20.5 -0.4 27.1 22nd 7.9 +0.4 1.1 1st 110.2 48.2 v high 229%
Yarrawonga 21.3 -0.9 27.5 22nd 8.0 +0.8 0.9 1st 114.6 37.7 v high 304%
Lower Northeast (district 82)
Benalla Airport 20.5   26.2 22nd 7.6   1.0 1st 108.1
Corryong Airport 21.2   25.9 29th 7.0   0.1 1st 216.4
Dartmouth Reservoir 20.2 -0.1 25.4 22nd 7.8 +1.0 1.8 1st 235.4 101.6 v high 232%
Hunters Hill 15.9 +0.3 21.7 5th 7.4 +0.5 -1.1 16th 247.4 93.1 v high 266%
Rutherglen Research 20.4 -0.5 26.0 22nd 7.4 +1.2 0.5 1st 179.4 59.0 highest 304%
Strathbogie 17.1 -0.6 23.1 22nd 6.2 +1.0 -1.7 2nd 161.0 86.5 v high 186%
Wangaratta Aero 20.7 -0.4 26.4 29th 7.3 +0.9 1.4 1st 134.6 53.7 v high 251%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 14.8 +0.8 19.6 21st 3.3 +0.8 -3.9 16th 117.8 77.1 high 153%
Falls Creek 9.3 +0.4 13.9 29th 2.2 +0.9 -6.6 16th 236.4 120.4 high 196%
Mount Buller 7.9 -0.5 13.9 29th 1.4 +0.1 -6.9 16th 193.0 147.5 high 131%
Mount Hotham 7.6 +0.5 12.3 29th 1.3 +0.8 -7.6 16th 269.6 125.4 high 215%
Omeo 18.3   23.4 22nd 5.3   -2.3 2nd 107.0
East Gippsland (district 84)
Combienbar AWS 19.2 +1.1 26.8 6th 8.2 +0.4 1.0 16th 91.6 94.3 average 97%
Gabo Island Lighthouse 17.1 0.0 20.4 31st 11.5 +0.4 6.0 20th 74.2 75.2 average 99%
Gelantipy 17.0 +0.8 23.0 6th 6.8 +1.1 -0.3 16th 136.8 71.3 v high 192%
Lakes Entrance (Eastern Beach Road) 18.8   27.5 6th 9.4   4.2 20th 135.2
Mallacoota 18.7 -0.1 26.5 31st 10.3 +0.7 3.5 20th 84.4 80.5 average 105%
Mount Nowa Nowa 19.3 +0.5 27.9 22nd 9.5 +0.6 2.5 16th 131.4 69.3 v high 190%
Orbost 20.0   28.2 6th 9.3   4.2 20th 97.2 59.6 high 163%
Orbost (Comparison) 20.5 +0.7 28.4 6th 8.0 -0.3 1.9 20th 101.4 77.0 high 132%
Point Hicks (Lighthouse) 19.3 +0.8 29.5 31st 11.1 +0.2 5.4 18th 77.6 76.8 average 101%
West Gippsland (district 85)
Bairnsdale Airport 20.0 +0.3 28.9 6th 8.0 +0.6 3.2 9th 93.6 60.2 high 155%
East Sale Airport 20.1 +0.9 28.5 6th 7.6 +0.1 1.7 9th 61.6 58.2 average 106%
Morwell (Latrobe Valley Airport) 19.6 +0.3 27.8 22nd 6.9 -0.5 0.9 1st 92.6 73.6 high 126%
Mount Baw Baw 8.5 +0.2 15.5 29th 1.6 +0.2 -6.4 16th 184.2
Mount Moornapa 19.1 +0.7 27.9 22nd 8.6 +0.6 1.2 16th 134.8 79.8 high 169%
Noojee (Slivar) 18.0 0.0 26.0 29th 7.1 +0.3 1.4 16th 166.6 111.0 high 150%
Pound Creek 18.2   26.8 29th 7.5   0.8 2nd 102.6
Wilsons Promontory Lighthouse 16.2 +0.4 23.7 22nd 10.7 +0.8 6.7 17th 72.2 92.3 average 78%
Yarram Airport 19.0   28.4 22nd 6.4   -0.2 20th 51.4
East Central (district 86)
Bundoora (Latrobe University) 19.9 +0.4 27.2 22nd 9.0 +0.4 2.5 2nd 122.4 65.2 v high 188%
Cerberus 18.5 +0.3 27.9 29th 8.4 -0.2 1.7 2nd 111.2 69.1 high 161%
Coldstream 19.8 +0.5 26.4 29th 6.9 +0.6 0.7 2nd 135.6 66.1 v high 205%
Coldstream Comparison 19.8   26.4 29th 6.8   0.7 2nd 135.4
Essendon Airport 19.6 +0.5 27.4 22nd 8.8 +0.7 2.3 2nd 128.2 61.2 v high 209%
Ferny Creek (Dunns Hill) 15.5 +0.3 23.6 22nd 7.3 +0.1 0.5 16th 180.4 94.7 high 190%
Frankston AWS 18.0 +0.5 26.1 29th 10.4 0.0 6.4 16th
Melbourne Airport 19.4 +0.2 27.2 22nd 8.4 0.0 2.6 2nd 128.8 54.9 v high 235%
Melbourne Regional Office 20.7 +1.1 28.9 22nd 10.9 +1.4 4.7 16th 135.2 66.3 v high 204%
Moorabbin Airport 19.3 +0.2 28.7 29th 9.2 0.0 3.2 2nd 163.6 71.0 v high 230%
Rhyll 18.0 +0.4 25.4 29th 10.7 +0.3 4.5 16th 103.8 62.0 v high 167%
Scoresby Research Institute 19.7 +0.8 27.1 22nd 8.4 -0.4 2.4 2nd 147.6 85.9 high 172%
Viewbank (ARPANSA) 20.2 +0.2 27.3 29th 8.8 +0.1 2.7 2nd 148.6 66.9 v high 222%
Wallan (Kilmore Gap) 15.5 -0.3 22.4 22nd 7.0 +0.4 0.1 16th 130.4 51.7 v high 252%
Wonthaggi 19.0 +1.0 28.4 29th 8.8 +0.1 4.0 16th 115.0 87.4 high 132%
West Central (district 87)
Avalon Airport 19.5 -0.3 29.3 29th 7.6 -0.2 0.3 2nd 101.0 49.8 v high 203%
Grovedale (Geelong Airport) 18.6 0.0 28.0 29th 7.4 -0.2 2.5 2nd 87.8 51.3 high 171%
Laverton RAAF 19.4 +0.2 29.1 22nd 8.4 +0.2 1.4 2nd 115.8 57.4 v high 202%
Sheoaks 18.0 +0.1 25.9 22nd 6.7 -0.5 0.5 2nd 116.8 55.8 v high 209%
North Central (district 88)
Castlemaine Prison 18.7 -0.5 25.8 22nd 7.5 +0.9 1.0 19th 146.2 60.3 v high 242%
Eildon Fire Tower 16.4 -0.1 22.0 22nd 7.8 +0.7 -0.9 16th 149.2 54.4 v high 274%
Lake Eildon 20.4 +0.6 27.2 29th 8.0 +0.8 2.3 16th 132.4 79.4 high 167%
Mangalore Airport 20.3 -0.1 26.7 22nd 7.7 +0.5 2.1 16th 106.4 48.3 v high 220%
Maryborough 19.5 -0.5 27.5 22nd 6.9 -0.3 2.4 16th 108.5 49.6 v high 219%
Redesdale 19.2 0.0 26.1 22nd 6.5 +1.1 0.8 19th 151.4 53.0 v high 286%
Western Plains (district 89)
Ararat Prison 18.5 +0.5 27.0 22nd 6.2 +0.2 -0.3 2nd 88.2 58.1 high 152%
Ballarat Aerodrome 16.9 +0.3 24.7 22nd 6.3 +0.1 0.0 19th 92.8 67.4 high 138%
Westmere 17.9   25.2 29th 5.9   0.5 2nd 94.4
West Coast (district 90)
Aireys Inlet 17.8 -0.1 28.5 29th 9.1 -0.1 3.3 16th 117.2 62.4 high 188%
Cape Nelson Lighthouse 17.6 +0.6 29.3 22nd 9.6 -0.7 4.4 1st 45.8 47.3 average 97%
Cape Otway Lighthouse 16.7 -0.2 27.4 29th 9.6 +0.1 5.0 16th 85.4 80.9 average 106%
Casterton 19.1   29.0 29th 6.8   1.1 24th 55.4
Casterton Showgrounds 19.4 +0.4 28.5 29th 6.8 -0.5 0.9 25th 53.8 57.8 average 93%
Colac (Mount Gellibrand) 16.5 -0.1 25.1 29th 7.5 +0.3 1.4 16th 99.2 52.2 v high 190%
Dartmoor 18.8   29.8 29th 7.0   0.3 25th 62.4
Hamilton Airport 18.1 +0.5 26.7 29th 6.5 0.0 0.9 25th 73.6 56.9 average 129%
Mortlake Racecourse 18.2 +0.5 26.5 29th 6.5 +0.4 1.4 25th 70.2 52.4 average 134%
Port Fairy AWS 18.4 +0.3 27.6 22nd 9.1 -0.1 3.2 25th 66.6 50.8 high 131%
Portland (Cashmore Airport) 17.1 +0.4 26.6 22nd 7.4 -0.8 2.0 19th 57.6 60.7 average 95%
Warrnambool Airport NDB 17.9 +0.2 25.9 29th 7.2 +0.2 1.1 25th 80.8 63.5 high 127%
Weeaproinah 14.2 +0.6 23.0 29th 6.8 +0.3 0.8 16th 176.8 173.7 average 102%

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 Monday 1 November 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