Victoria in October 2011:

- Warmer than usual, both daytime and overnight

- Near normal rainfall in the south

- Slightly drier than usual in the north

Summary

Across the State of Victoria on average, overnight minimum temperatures were slightly warmer than those usually experienced Daytime maximum temperatures at most localities were also slightly warmer than those registered in the past.  Total rainfall for the month was generally slightly less than that usually recorded, especially north of the Divide.

As is typical of seasons when we have a La Nia event over the Pacific, Victoria's weather was influenced by easterly flow, as a consequence of a persistence of anticyclones over higher latitudes - pressures were as much as 10 hPa above normal to the south of Tasmania.This resulted in more humid and slightly warmer weather than usual.

Details Extremes Maps Records Summaries Important notes the top

Rainfall

The wettest overall was 213.2 mm at Reeves Knob.

Some sites had their highest total October rainfall on record.

Some sites had their highest total October rainfall for at least 10 years.

There is a map of total rainfall below.

There is a map of rainfall deciles below.

Temperature

Maximum temperature

The hottest day was 36.1 C at Mildura Airport on the 23rd.

The warmest days on average were 25.1 C at Mildura Airport.

The coolest days on average were 7.4 C at Mount Hotham.

The coldest day was -0.9 C at Mount Buller on the 1st.

There is a map of mean maximum temperatures below.

There is a map of maximum temperature anomalies below.

Minimum temperature

The coldest night was -6.4 C at Dinner Plain (Mount Hotham Airport) on the 17th.

The coolest nights on average were 1.1 C at Mount Hotham.

The warmest nights on average were 11.6 C at Gabo Island Lighthouse.

The warmest night was 21.7 C at Cape Otway Lighthouse on the 20th, and at Mildura Airport on the 24th.

Some sites had their warmest October night (highest daily minimum temperature) on record.

Some sites had their highest October mean daily minimum temperature on record.

Some sites had their highest October mean daily minimum temperature for at least 10 years.

There is a map of mean minimum temperatures below.

There is a map of minimum temperature anomalies below.

Wind

The strongest wind gust was 130 km/h at Wilsons Promontory Lighthouse on the 16th.

Further information

Media
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Extremes in October 2011
Hottest day 36.1 C at Mildura Airport on the 23rd
Warmest days on average 25.1 C at Mildura Airport
Coolest days on average 7.4 C at Mount Hotham
Coldest day -0.9 C at Mount Buller on the 1st
Coldest night -6.4 C at Dinner Plain (Mount Hotham Airport) on the 17th
Coolest nights on average 1.1 C at Mount Hotham
Warmest nights on average 11.6 C at Gabo Island Lighthouse
Warmest night 21.7 C at Cape Otway Lighthouse on the 20th
21.7 C at Mildura Airport on the 24th
Wettest overall 213.2 mm at Reeves Knob
Highest wind gust 130 km/h at Wilsons Promontory Lighthouse on the 16th

Maps

Anomaly in mean maximum temperature

Map of Anomaly in mean maximum temperature

Mean maximum temperature

Map of Mean maximum temperature

Anomaly in mean minimum temperature

Map of Anomaly in mean minimum temperature

Mean minimum temperature

Map of Mean minimum temperature

Rainfall deciles

Map of Rainfall deciles

Rainfall totals

Map of Rainfall totals


Record highest total October rainfall
Total rainfall
for October 2011 (mm)
Previous highest
for October
Years of
record
Average for
October
Avon River @ The Channel 140.8 110.4 in 2003 11 58.0
Mitchell River @ Glenaladale 143.8 118.0 in 2003 11 62.4
Wonnangatta River @ Waterford 142.2 123.0 in 2010 11 64.6
Boolarra South 120.6 = 120.6 in 2002 10 94.4
Moorabool River at Morrisons 133.0 114.8 in 2003 10 56.2
Mount Baw Baw 186.8 184.2 in 2010 10 141.1
Reeves Knob 213.2 153.2 in 2009 10 94.0

Highest total October rainfall for at least 10 years
Total rainfall
for October 2011 (mm)
Most recent October
this high or higher
Years since
higher
Average for
October
Durdidwarrah 99.0 132.8 in 1995 15 69.2
Dargo 115.4 118.0 in 1995 14 77.7
Murderers Hill 130.0 149.4 in 1998 11 81.4
Hawkesdale (Post Office) 96.8 107.2 in 2001 10 65.6
Orbost (Comparison) 102.2 111.2 in 2001 10 77.1



Record highest October daily minimum temperature
Highest daily minimum
temperature
in October 2011 (C)
Previous highest
for October
Years of
record
Average for
October
Mortlake Racecourse 17.5 on the 20th 16.4 on the 9th in 1999 20 6.1
Rhyll 17.1 on the 20th 16.9 on the 31st in 2009 20 10.4
Sheoaks 20.0 on the 20th 19.8 on the 26th in 2008 20 7.1
Avalon Airport 19.5 on the 20th 18.5 on the 16th in 1996 17 7.8



Record highest October mean daily minimum temperature
Mean daily minimum
temperature
for October 2011 (C)
Previous highest
for October
Years of
record
Average for
October
Aireys Inlet 10.4 10.3 in 1999 19 9.2
Cerberus 9.9 9.5 in 2005 19 8.6
Port Fairy AWS 10.5 10.2 in 1992 19 9.2
Coldstream 8.1 = 8.1 in 2005 17 6.4
Wallan (Kilmore Gap) 7.9 7.8 in 2005 17 6.6
Yarrawonga 8.6 = 8.6 in 1999 17 7.2
Shepparton Airport 8.4 8.2 in 1999 15 7.1
Stawell Aerodrome 8.6 8.0 in 2005 15 7.2
Horsham Aerodrome 6.9 6.8 in 2005 14 5.4
Warrnambool Airport NDB 8.7 8.3 in 2005 13 7.0
Colac (Mount Gellibrand) 8.6 8.2 in 2004 11 7.2
Orbost 9.7 = 9.7 in 2005 10 9.0

Highest October mean daily minimum temperature for at least 10 years
Mean daily minimum
temperature
for October 2011 (C)
Most recent October
this high or higher
Years since
higher
Average for
October
Laverton RAAF 9.4 =9.4 in 1977 34 8.2
Ararat Prison 7.4 =7.4 in 1992 19 6.0
Bendigo Airport 7.8 8.4 in 1992 19 6.4
Horsham Polkemmet Rd 7.0 8.0 in 1992 19 7.1
Maryborough 8.2 =8.2 in 1992 19 7.2
Wangaratta Aero 7.6 9.3 in 1992 19 6.4
Ballarat Aerodrome 6.7 6.8 in 1992 18 6.2
Kyabram DPI 8.5 =8.5 in 1996 15 7.5
Sheoaks 8.1 9.0 in 1996 15 7.1
Avalon Airport 8.9 9.3 in 1999 12 7.8
Cape Nelson Lighthouse 11.3 11.5 in 1999 12 10.3
Cape Otway Lighthouse 11.0 11.2 in 1999 12 9.5
Dartmouth Reservoir 8.0 8.3 in 1999 12 6.8
East Sale Airport 8.2 8.9 in 1999 12 7.5
Kerang 10.0 10.1 in 1999 12 8.8
Portland (Cashmore Airport) 9.2 9.3 in 1999 12 8.2
Swan Hill Aerodrome 9.0 9.4 in 1999 12 7.8



Summary statistics for October 2011
Maximum temperatures
for October
(C)
Minimum temperatures
for October
(C)
Rainfall
for October
(millimetres)
Mean for
October
2011
Diff
from
average
Highest for
October
2011
Mean for
October
2011
Diff
from
average
Lowest for
October
2011
Total for
October
2011
Average
for
October
Rank of
October
2011
Fraction of
October
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 21.8 +0.3 30.9 23rd 8.6 +0.7 2.6 12th 30.0 53.0 average 57%
Hume Reservoir 21.8 +0.9 29.5 23rd 9.9 +0.8 3.0 12th 35.6 69.5 low 51%
North Mallee (district 76)
Mildura Airport 25.1 +1.3 36.1 23rd 10.8 +1.0 4.2 3rd 27.4 30.4 average 90%
Ouyen (Post Office) 24.4 +0.7 34.6 28th 9.8 +1.0 4.1 4th 38.4 35.2 average 109%
Walpeup Research 24.5 +1.4 35.1 28th 9.7 +0.9 3.5 10th 41.0 34.1 average 120%
South Mallee (district 77)
Hopetoun Airport 23.8   34.4 28th 8.5   1.1 10th 41.8
Swan Hill Aerodrome 24.4 +0.7 34.8 23rd 9.0 +1.2 2.7 12th 24.4 24.2 average 101%
North Wimmera (district 78)
Nhill Aerodrome 22.0   33.3 19th 8.5   1.5 2nd 35.2
Warracknabeal Museum 22.6 +0.8 32.5 28th 8.7 +1.1 0.6 17th 37.3 39.4 average 95%
South Wimmera (district 79)
Edenhope Airport 20.4   32.1 19th 9.0   2.0 17th 39.2
Grampians (Mount William) 11.7   22.4 19th 4.0   -1.0 10th 80.0
Horsham Aerodrome 21.7 +0.3 32.0 19th 6.9 +1.5 -1.2 17th 34.8 35.1 average 99%
Horsham Polkemmet Rd 21.7 +0.7 31.9 19th 7.0 -0.1 0.6 3rd 38.8 43.7 average 89%
Kanagulk 20.1   31.3 19th 8.4   1.2 17th 42.2
Longerenong 21.5 +0.7 31.6 19th 7.2 +0.5 -1.3 17th 34.6 42.1 average 82%
Pyrenees (Ben Nevis) 15.1   25.3 19th 6.3   0.7 1st 57.2
Stawell Aerodrome 20.1 +0.5 30.5 19th 8.6 +1.4 1.4 3rd 39.8 38.3 average 104%
Lower North (district 80)
Charlton 22.7   33.7 28th 8.7   1.0 17th 31.8
Echuca Aerodrome 23.1 +1.1 33.1 23rd 8.4 -0.2 2.2 17th 11.4 42.7 low 27%
Kerang 23.8 +1.1 34.0 23rd 10.0 +1.2 5.0 3rd 15.0 37.8 low 40%
Kyabram DPI 22.5 +1.3 32.4 23rd 8.5 +1.0 2.1 10th 10.2 40.7 low 25%
Upper North (district 81)
Bendigo Airport 21.1 +0.8 30.9 28th 7.8 +1.4 0.2 17th 24.8 43.1 average 58%
Shepparton Airport 22.3 +0.7 31.1 23rd 8.4 +1.3 2.7 3rd 12.0 35.3 low 34%
Tatura Inst Sustainable Ag 21.9 +1.0 31.7 23rd 8.2 +0.7 1.0 17th 10.6 47.8 low 22%
Yarrawonga 22.9 +0.7 33.2 23rd 8.6 +1.4 2.7 12th 22.8 36.9 average 62%
Lower Northeast (district 82)
Benalla Airport 21.7   30.1 23rd 8.3   2.4 17th 33.9
Corryong Airport 21.2   28.0 24th 6.0   0.5 17th 67.8
Dartmouth Reservoir 21.0 +0.7 28.6 23rd 8.0 +1.2 2.1 10th 45.8 100.7 low 45%
Hunters Hill 16.4 +0.8 24.2 23rd 7.3 +0.4 1.8 1st 63.2 91.5 average 69%
Rutherglen Research 21.5 +0.6 30.7 23rd 6.4 +0.2 -0.1 12th 28.8 58.7 low 49%
Strathbogie 18.2 +0.5 26.3 23rd 5.8 +0.5 -0.8 3rd 43.2 86.1 low 50%
Wangaratta Aero 21.7 +0.6 30.8 23rd 7.6 +1.2 1.4 12th 22.2 52.4 low 42%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 14.4 +0.3 21.6 23rd 2.7 +0.1 -6.4 17th 89.2 78.1 average 114%
Edi Upper 21.0 +1.3 28.5 23rd 7.8 +0.7 2.0 17th 47.0 83.6 average 56%
Falls Creek 9.3 +0.4 16.2 23rd 2.0 +0.6 -4.7 3rd 97.2 119.2 average 82%
Mount Hotham 7.4 +0.3 14.8 23rd 1.1 +0.6 -5.8 3rd 126.8 125.5 average 101%
Omeo 18.1   25.8 23rd 4.8   -2.4 17th 70.8
East Gippsland (district 84)
Combienbar AWS 18.4 +0.3 28.5 20th 8.2 +0.4 3.6 3rd 144.6 97.1 high 149%
Gabo Island Lighthouse 17.4 +0.3 24.7 24th 11.6 +0.5 7.2 18th 69.0 75.1 average 92%
Gelantipy 16.3 +0.1 24.7 23rd 6.3 +0.5 0.4 10th 101.0 72.9 average 139%
Lakes Entrance (Eastern Beach Road) 18.9   31.4 20th 9.7   3.0 4th 83.4
Mallacoota 18.7 -0.1 27.5 20th 10.4 +0.7 5.2 5th 75.2 80.3 average 94%
Mount Nowa Nowa 19.2 +0.3 31.1 20th 9.5 +0.6 4.8 3rd 96.2 71.0 average 135%
Orbost 19.8 +0.1 30.4 20th 9.7 +0.7 4.2 18th 84.8 61.9 average 137%
Orbost (Comparison) 20.1 +0.3 30.9 20th 8.8 +0.5 2.2 4th 102.2 77.1 high 133%
Point Hicks (Lighthouse) 19.0 +0.5 27.8 15th 11.3 +0.4 7.7 3rd 64.7 76.5 average 85%
West Gippsland (district 85)
Bairnsdale Airport 19.9 +0.2 31.5 20th 7.8 +0.3 0.8 4th 76.0 60.7 average 125%
East Sale Airport 19.4 +0.2 30.8 20th 8.2 +0.7 1.5 4th 60.4 58.2 average 104%
Morwell (Latrobe Valley Airport) 19.9 +0.5 30.6 20th 8.2 +0.8 1.8 3rd 65.6 73.3 average 89%
Mount Baw Baw 8.4 +0.1 17.3 20th 2.1 +0.7 -3.4 10th 186.8 141.1 highest 132%
Mount Moornapa 18.0 -0.4 30.1 20th 8.7 +0.7 4.1 3rd 145.8 83.5 high 175%
Noojee (Slivar) 18.3 +0.3 27.8 20th 7.6 +0.8 0.9 3rd 114.6 111.1 average 103%
Pound Creek 18.7   28.8 20th 8.8   1.3 3rd 81.8
Willow Grove (Blue Rock Reservoir) 19.3 +0.6 28.6 20th 7.9 0.0 4.3 3rd 94.2 78.5 average 120%
Wilsons Promontory Lighthouse 16.2 +0.4 29.3 20th 11.1 +1.2 7.9 10th 69.6 92.2 average 75%
Yarram Airport 18.5   30.4 20th 7.7   0.2 3rd 77.8
East Central (district 86)
Bundoora (Latrobe University) 20.1 +0.6 29.1 23rd 9.2 +0.6 2.0 3rd 78.5 65.6 average 120%
Cerberus 19.1 +0.9 29.1 20th 9.9 +1.3 3.6 4th 79.6 69.6 average 114%
Coldstream 20.4 +1.1 28.0 20th 8.1 +1.7 0.9 3rd 91.6 67.5 high 136%
Coldstream Comparison 20.3   28.0 20th 8.0   0.8 3rd 91.6
Cranbourne Botanic Gardens 19.6 +0.9 29.0 20th 9.6 +0.9 4.3 13th 104.7 80.1 average 131%
Essendon Airport 19.9 +0.8 29.2 23rd 9.6 +1.5 2.6 3rd 68.2 61.3 average 111%
Ferny Creek 16.5   24.9 20th 8.7   3.3 10th 140.2
Frankston AWS 18.4 +0.9 27.1 19th 11.5 +1.1 7.5 4th
Melbourne Airport 19.8 +0.6 29.1 23rd 9.0 +0.6 2.5 3rd 71.0 55.3 high 128%
Melbourne Regional Office 20.8 +1.1 30.3 23rd 11.4 +1.9 5.6 3rd 64.2 66.4 average 97%
Moorabbin Airport 19.7 +0.6 29.2 23rd 10.3 +1.1 3.7 3rd 77.4 71.1 average 109%
Phillip Island Penguin Reserve 17.7 -0.1 26.7 19th 9.4 +0.6 2.0 4th 46.1 68.8 low 67%
Rhyll 18.5 +0.8 25.9 20th 11.5 +1.1 7.5 10th 68.8 62.4 average 110%
Scoresby Research Institute 20.0 +1.1 28.9 20th 9.3 +0.5 1.5 3rd 76.6 85.7 average 89%
Viewbank (ARPANSA) 20.3 +0.2 28.7 23rd 9.4 +0.7 2.3 3rd 82.2 68.2 average 121%
Wallan (Kilmore Gap) 15.9 +0.2 24.2 23rd 7.9 +1.3 2.5 3rd 29.4 50.5 average 58%
Wonthaggi 19.1 +1.0 29.2 20th 9.6 +0.9 3.8 3rd 98.9 87.5 average 113%
West Central (district 87)
Avalon Airport 20.2 +0.4 31.7 20th 8.9 +1.1 1.9 18th 85.2 51.0 high 167%
Breakwater (Geelong Racecourse) 19.7   30.8 19th 10.0   4.1 18th 67.6
Laverton RAAF 19.9 +0.7 30.0 20th 9.4 +1.2 1.5 3rd 60.0 57.4 average 105%
Sheoaks 18.6 +0.7 27.9 23rd 8.1 +1.0 1.6 2nd 84.8 57.5 high 147%
North Central (district 88)
Castlemaine Prison 19.3 +0.1 28.3 23rd 7.4 +0.8 0.2 10th 50.8 60.1 average 85%
Eildon Fire Tower 17.4 +0.9 25.2 20th 8.1 +0.9 2.1 10th 39.8 53.5 average 74%
Lake Eildon 20.9 +1.1 28.6 23rd 8.3 +1.1 2.1 3rd 44.4 79.1 low 56%
Mangalore Airport 20.9 +0.5 29.6 23rd 7.8 +0.6 0.4 17th 32.4 48.0 average 68%
Maryborough 20.6 +0.6 29.6 23rd 8.2 +1.0 2.0 17th 48.6 49.6 average 98%
Redesdale 20.0 +0.8 29.0 23rd 6.3 +0.9 -1.1 17th 23.4 52.7 low 44%
Western Plains (district 89)
Ararat Prison 19.4 +1.4 29.7 19th 7.4 +1.4 -1.7 17th 45.3 57.9 average 78%
Ballarat Aerodrome 17.3 +0.7 25.9 23rd 6.7 +0.5 0.3 17th 65.6 67.4 average 97%
Westmere 19.1   29.8 19th 6.6   -0.9 3rd 46.2
West Coast (district 90)
Aireys Inlet 17.9 0.0 30.1 19th 10.4 +1.2 5.7 10th 74.6 63.1 average 118%
Cape Nelson Lighthouse 17.7 +0.6 32.8 19th 11.3 +1.0 6.8 13th 53.4 47.6 average 112%
Cape Otway Lighthouse 17.1 +0.2 29.9 19th 11.0 +1.5 7.0 10th 78.6 80.8 average 97%
Casterton 19.3   31.8 19th 8.5   1.3 3rd 45.2
Colac (Mount Gellibrand) 17.6 +1.0 27.7 19th 8.6 +1.4 3.6 10th 78.2 54.3 average 144%
Dartmoor 19.0   31.2 19th 8.8   1.7 3rd 58.4
Hamilton Airport 18.3 +0.7 29.7 19th 7.4 +0.9 1.3 2nd 65.6 57.2 average 115%
Mortlake Racecourse 18.9 +1.2 29.4 19th 7.4 +1.3 -0.4 2nd 39.0 51.7 average 75%
Port Fairy AWS 18.4 +0.3 31.1 19th 10.5 +1.3 5.2 10th 65.4 51.6 average 127%
Portland (Cashmore Airport) 17.7 +1.0 30.4 19th 9.2 +1.0 4.0 13th 77.2 61.2 average 126%
Portland NTC AWS 16.8   30.6 19th 11.4   6.8 13th
Warrnambool Airport NDB 18.0 +0.2 28.7 19th 8.7 +1.7 1.5 3rd 47.2 62.3 low 76%
Weeaproinah 14.7 +1.1 24.9 19th 7.3 +0.7 3.0 10th 211.2 174.0 high 121%

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 2 November 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