Thursday, 1 November 2007 - Monthly Climate Summary for Victoria - Product code IDCKGC16R0

Victoria in October 2007

Summary - based on data available at 9.00am 1 November 2007.

Warm and dry.

 

Rainfall

Rainfall was well below normal throughout the State. The driest District was the South Mallee with only 4.0 mm (normal: 36.0 mm). The wettest District was the Upper Northeast with 47.9 mm (normal: 104.8 mm). The heaviest individual town rainfall was 156.4 mm at Weeaproinah. The driest individual town rainfall was 0.0 mm at Kerang. The wettest single day 49.8 mm at Mount Buller on the 1st. Some sites had their lowest total October rainfall on record. Some sites had their lowest total October rainfall for at least 10 years.

Maximum temperature

Maximum temperatures were about 2 deg C above normal in most Districts. The hottest day was 38.6 C at Hopetoun Airport on the 21st. The warmest days on average were 25.8 C at Mildura Airport. The coolest days on average were 8.1 C at Mt Hotham. The coldest day was -0.1 C at Mt Baw Baw on the 16th. Some sites had their highest October temperature on record. Some sites had their highest October mean daily maximum temperature on record. Some sites had their highest October mean daily maximum temperature for at least 10 years.

Minimum temperature

Overnight temperatures were slightly above normal in most Districts but in the western third of the State they were slightly below normal. The coldest night was -5.7 C at Mt Hotham on the 17th. The coolest nights on average were 1.4 C at Mt Hotham. The warmest nights on average were 11.6 C at Gabo Island Lighthouse and also 11.6 C at Melbourne Regional Office.The warmest nights were 23.2 C at Mt Nowa Nowa on the 22nd and 23.1 at Melbourne on the 28th. Some sites had their lowest October temperature on record. Some sites had their warmest October night (highest daily minimum temperature) on record. Some sites had their highest October mean daily minimum temperature for at least 10 years.

Wind

Widespread damage from strong winds was reported on the 28th. The strongest wind gust during the month was 133 km/h at Wilsons Promontory Lighthouse on the 16th.

Explanation

A La Nia event is well established in the Pacific. The main characteristics are colder than average temperatures along the equator both on and below the surface, stronger than average Trade Winds and reduced cloudiness. Computer models forecast the La Nia to last until at least early 2008. However, this La Nia has been late to develop by historical standards. In the past, most significant La Nia events were established by winter's end, with widespread above-average rain falling over Australia's eastern half. With such a late-developing La Nia, the associated Australian rainfall response may differ from past episodes. Indeed it has been largely absent to date.

Australia's climate over recent months has been influenced by the unusually cool ocean temperatures to the north, and particularly northwest, of the continent. A marked cooling trend began in June when, historically, these waters would have been expected to warm as the La Nia evolved in the Pacific. These cooler than normal waters inhibit the formation of northwest cloudbands, which are a major source of winter and spring rain for central and southeastern Australia during La Nia years. During October there has been a slight warming of the ocean to the north and northwest of the continent.

Further informationDr Harvey Stern
Climate Meteorologist
Victoria Climate Services Centre
Bureau of Meteorology
Phone (03) 9669 4956
Email climate.vic@bom.gov.au

Extremes

Hottest day
Highest temperature
38.6 C at Hopetoun Airport on the 21st
Warmest days on average
Highest mean daily maximum temperature
25.8 C at Mildura Airport
Coolest days on average
Lowest mean daily maximum temperature
8.1 C at Mt Hotham
Coldest day
Lowest daily maximum temperature
-0.1 C at Mt Baw Baw on the 16th
Coldest night
Lowest temperature
-5.7 C at Mt Hotham on the 17th
Coolest nights on average
Lowest mean daily minimum temperature
1.4 C at Mt Hotham
Warmest nights on average
Highest mean daily minimum temperature
11.6 C at Gabo Island Lighthouse
11.6 C at Melbourne Regional Office
Warmest night
Highest daily minimum temperature
23.2 C at Mt Nowa Nowa on the 22nd
Wettest overall
Highest total rainfall
156.4 mm at Weeaproinah
Driest overall
Lowest total rainfall
0.0 mm at Kerang
Wettest day
Highest daily rainfall
49.8 mm at Mount Buller on the 1st
Highest wind gust
133 km/h at Wilsons Promontory Lighthouse on the 16th

Records

Record lowest total October rainfall
Total rainfall
for October 2007 (mm)
Previous lowest
for October
Years of
record
Normal for
October
Kerang 0.0 = 0.0 in 1914 113 37.3
Melbourne Airport 4.4 8.4 in 2006 38 55.0
Bendigo Airport 0.6 2.0 in 2006 16 43.6

Lowest total October rainfall for at least 10 years
Total rainfall
for October 2007 (mm)
Most recent lower
for October
Years since
lower
Normal for
October
Maryborough 3.2 1.3 in 1914 93 49.0



Record highest October temperature
Highest temperature
in October 2007 (C)
Previous highest
for October
Years of
record
Normal for
October
Mangalore Airport 36.3 on the 21st 35.9 on the 12th in 2006 49 20.3
Kerang 38.5 on the 21st 37.8 on the 12th in 2004 45 22.7
Rutherglen Research 35.1 on the 21st = 35.1 on the 13th in 2006 43 20.8
Tatura Inst Sustainable Ag 35.6 on the 21st 35.2 on the 12th in 2006 43 20.8
Kyabram DPI 36.4 on the 21st 36.3 on the 30th in 1965 41 21.0
Wangaratta Aero 35.8 on the 21st 35.0 on the 13th in 2006 20 20.9
Bendigo Airport 35.5 on the 21st = 35.5 on the 12th in 2006 16 19.9
Frankston AWS 32.5 on the 21st 30.7 on the 12th in 2004 16 17.4
Gelantipy 28.0 on the 21st 27.8 on the 13th in 2006 15 16.1
Yarrawonga 36.4 on the 21st 36.0 on the 12th in 2006 14 21.8
Eildon Fire Tower 30.6 on the 21st 30.4 on the 12th in 2006 12 16.1
Shepparton Airport 36.8 on the 21st 36.3 on the 12th in 2006 12 21.2



Record highest October mean daily maximum temperature
Mean daily maximum
temperature
for October 2007 (C)
Previous highest
for October
Years of
record
Normal for
October
Laverton RAAF 21.8 = 21.8 in 1961 65 19.1

Highest October mean daily maximum temperature for at least 10 years
Mean daily maximum
temperature
for October 2007 (C)
Most recent higher
for October
Years since
higher
Normal for
October
Laverton RAAF 21.8 21.8 in 1961 46 19.1
Orbost (Comparison) 21.4 21.6 in 1981 25 19.7



Record highest October daily minimum temperature
Highest daily minimum
temperature
in October 2007 (C)
Previous highest
for October
Years of
record
Normal for
October
Essendon Airport 21.3 on the 28th 19.2 on the 12th in 2006 38 8.0
Bundoora (Latrobe University) 20.8 on the 28th 20.2 on the 23rd in 1980 25 8.6
Edi Upper 18.6 on the 22nd 16.6 on the 31st in 1990 20 7.1
Wallan (Kilmore Gap) 17.0 on the 22nd 16.7 on the 26th in 1997 14 6.5
Eildon Fire Tower 21.2 on the 22nd 20.4 on the 13th in 2006 12 7.0
Mt Nowa Nowa 23.2 on the 22nd 22.2 on the 13th in 2006 12 8.8
Shepparton Airport 19.0 on the 22nd 17.8 on the 18th in 2006 12 7.0
Stawell Aerodrome 18.2 on the 22nd 18.0 on the 16th in 1996 12 7.1
Horsham Aerodrome 17.0 on the 22nd = 17.0 on the 29th in 2005 11 5.4



Record lowest October temperature
Lowest temperature
in October 2007 (C)
Previous lowest
for October
Years of
record
Normal for
October
Horsham Polkemmet Rd -2.5 on the 9th -1.5 on the 16th in 2004 48 7.2
Wangaratta Aero -3.3 on the 8th -3.1 on the 9th in 2006 20 6.5
Geelong Airport 1.1 on the 18th 1.2 on the 10th in 2006 18 7.6



Highest October mean daily minimum temperature for at least 10 years
Mean daily minimum
temperature
for October 2007 (C)
Most recent higher
for October
Years since
higher
Normal for
October
Edi Upper 8.5 8.7 in 1991 15 7.1



Summaries

In this table, key sites have been highlighted to make them easier to find. This table is very wide and may not fit if printed.

Summary statistics for October 2007
Maximum temperatures
for October
(C)
Minimum temperatures
for October
(C)
Rainfall
for October
(millimetres)
Mean for
October
2007
Diff
from
normal
Highest for
October
2007
Mean for
October
2007
Diff
from
normal
Lowest for
October
2007
Total for
October
2007
Normal
for
October
Rank of
October
2007
Fraction of
October
normal
North Mallee (district 76)
Mildura Airport 25.8 +2.0 37.2 21st 10.0 +0.3 3.7 9th 8.2 30.2 low 27%
Ouyen 25.3 +1.7 37.3 21st 7.9 -0.9 1.9 13th 8.1 35.2 low 23%
Walpeup Research 25.0 +2.0 37.5 21st 8.5 -0.3 2.8 13th 5.6 34.2 very low 16%
South Mallee (district 77)
Hopetoun Airport 24.9 38.6 21st 6.2 -1.4 17th 4.8
Swan Hill Aerodrome 25.3 +2.0 38.3 21st 7.7 +0.1 1.1 17th 1.4 20.6 low 7%
North Wimmera (district 78)
Nhill 23.0 +1.9 36.6 21st 5.7 -1.3 -2.2 8th 11.2 39.5 low 28%
Nhill Aerodrome 23.0 36.9 21st 6.6 0.0 8th 13.6
Warracknabeal Museum 23.7 +2.0 37.0 21st 7.4 -0.3 0.6 9th 5.4 41.9 very low 13%
South Wimmera (district 79)
Edenhope Airport 20.1 34.5 21st 6.9 -0.4 17th 15.8
Grampians 12.2 26.7 21st 3.1 -1.6 7th 56.4
Horsham Aerodrome 22.6 +1.4 37.0 21st 4.9 -0.5 -1.0 7th 8.4 36.1 low 23%
Horsham Polkemmet Rd 22.7 +1.8 36.5 21st 5.6 -1.6 -2.5 9th 11.0 43.2 low 25%
Kanagulk 20.1 35.8 21st 5.9 -0.7 8th 15.2
Longerenong 22.8 +2.0 36.3 21st 5.3 -1.4 -2.1 8th 7.4 40.2 low 18%
Stawell Aerodrome 20.5 +1.2 35.4 21st 7.2 0 0.1 7th 6.4 38.7 low 17%
Lower North (district 80)
Charlton 24.3 37.1 21st 7.4 0.9 17th 1.4
Kerang 25.4 +2.7 38.5 21st 9.2 +0.4 3.3 13th 0.0 37.3 lowest 0%
Kyabram DPI 23.8 +2.8 36.4 21st 8.0 +0.6 1.7 8th 2.0 42.3 very low 5%
Upper North (district 81)
Bendigo Airport 22.2 +2.3 35.5 21st 6.6 +0.4 -0.7 17th 0.6 43.6 lowest 1%
Shepparton Airport 23.9 +2.7 36.8 21st 7.6 +0.6 1.0 10th 5.0 35.0 very low 14%
Tatura Inst Sustainable Ag 23.4 +2.6 35.6 21st 7.1 -0.5 0.2 8th 5.8 47.8 very low 12%
Yarrawonga 24.8 +3.1 36.4 21st 8.1 +1.1 0.0 8th 5.8 35.6 low 16%
Lower Northeast (district 82)
Benalla Airport 23.4 35.3 21st 6.1 -1.6 8th 16.9
Corryong Airport 23.1 32.3 22nd 4.8 -2.6 8th 33.4
Dartmouth Reservoir 21.6 +1.4 31.5 22nd 6.2 -0.6 -0.4 13th 44.8 100.9 low 44%
Hunters Hill 17.2 +1.9 27.0 21st 8.3 +1.8 0.0 13th 16.0 91.4 very low 18%
Rutherglen Research 23.9 +3.1 35.1 21st 5.3 -0.9 -4.1 8th 18.2 58.3 low 31%
Strathbogie 18.8 +1.1 30.9 21st 5.6 +0.4 -1.6 8th 31.2 86.9 low 36%
Wangaratta Aero 23.7 +2.8 35.8 21st 5.4 -1.0 -3.3 8th 10.8 54.2 low 20%
Upper Northeast (district 83)
Dinner Plain 15.1 23.9 21st 4.0 -4.4 8th 54.4
Edi Upper 21.9 +2.3 31.8 23rd 8.5 +1.4 2.4 17th 19.6 85.2 low 23%
Falls Creek 10.2 +1.5 18.9 22nd 2.3 +1.1 -4.8 17th 69.6 120.3 low 58%
Mount Buller 9.6 +1.3 19.4 21st 2.3 +1.1 -4.5 17th 95.8 150.4 normal 64%
Mt Hotham 8.1 +1.2 17.1 21st 1.4 +1.0 -5.7 17th 86.0 107.3 normal 80%
Omeo 19.5 29.8 21st 6.0 -2.2 8th 34.6
Omeo Comparison 19.8 +1.6 29.7 21st 5.6 +1.0 -1.8 8th 38.8 68.3 low 57%
East Gippsland (district 84)
Combienbar AWS 20.1 +2.2 31.1 21st 8.6 +0.9 3.1 13th 55.4 93.1 very low 60%
Gabo Island Lighthouse 18.7 +1.8 27.8 22nd 11.6 +0.4 7.7 13th 57.4 72.5 normal 79%
Gelantipy 17.9 +1.9 28.0 21st 6.7 +1.1 0.7 8th 40.4 66.1 low 61%
Lakes Entrance 19.7 28.5 28th 9.4 2.5 18th 37.0
Mallacoota 20.0 +1.3 30.5 21st 10.5 +1.0 5.8 18th 36.0 80.7 low 45%
Mt Nowa Nowa 20.0 +1.3 33.8 21st 9.5 +0.7 4.9 13th 27.8 62.9 very low 44%
Orbost 20.7 33.2 21st 9.5 3.5 18th 30.2
Orbost 21.4 +1.7 33.3 21st 8.8 +0.5 1.8 18th 30.2 75.4 low 40%
Point Hicks 20.0 +1.5 28.8 21st 11.5 +0.6 7.5 4th 51.4 77.5 low 66%
West Gippsland (district 85)
Bairnsdale Airport 21.0 +1.4 31.8 21st 7.8 +0.3 0.5 18th 27.8 59.9 very low 46%
East Sale Airport 20.7 +1.6 31.1 21st 7.5 0 0.8 18th 22.0 59.1 very low 37%
Morwell 20.5 +1.3 33.3 21st 7.3 -0.2 0.4 7th 38.0 77.4 very low 49%
Mt Baw Baw 9.2 20.8 21st 2.1 -3.8 7th 122.8
Mt Moornapa 19.6 +1.3 31.3 21st 8.5 +0.6 4.3 13th 35.8 80.3 very low 45%
Noojee 18.8 +1.0 31.0 21st 7.1 +0.5 0.9 18th 46.8 115.5 very low 41%
Pound Creek 18.5 26.8 27th 8.5 1.7 20th 76.8
Wilsons Promontory Lighthouse 16.4 +0.7 27.6 21st 10.4 +0.4 7.4 7th 80.0 92.1 normal 87%
East Central (district 86)
Bundoora 21.1 +1.8 32.9 21st 9.4 +0.9 2.5 18th 15.2 66.3 very low 23%
Cerberus 19.1 +1.0 28.7 21st 8.6 -0.1 1.8 7th 38.0 69.8 low 54%
Coldstream 20.6 +1.5 33.2 21st 6.6 +0.2 -0.7 18th 17.2 65.3 low 26%
Cranbourne Botanic Gardens 19.3 +0.7 32.0 21st 8.9 0 3.0 18th 46.9 79.6 low 59%
Essendon Airport 21.2 +2.3 32.9 21st 9.3 +1.4 2.5 7th 12.2 62.2 very low 20%
Ferny Creek 16.2 +1.1 29.2 21st 7.2 0 3.0 7th 33.0 93.5 very low 35%
Frankston AWS 17.9 +0.5 32.5 21st 10.9 +0.5 6.9 18th
Melbourne Airport 21.2 +2.1 33.3 21st 8.9 +0.4 2.0 7th 4.4 55.0 lowest 8%
Melbourne Regional Office 21.4 +1.7 33.5 21st 11.6 +1.9 5.7 7th 17.6 64.0 very low 26%
Moorabbin Airport 20.6 +1.6 34.1 21st 10.0 +0.9 3.5 18th 27.4 70.5 very low 39%
Phillip Island Penguin Reserve 18.0 +0.1 27.3 27th 9.6 +0.6 1.0 10th 48.5 69.5 low 70%
Rhyll 18.3 +0.8 26.2 27th 10.7 +0.4 7.5 7th 41.0 62.0 low 66%
Scoresby Research Institute 20.4 +1.6 32.9 21st 9.0 +0.2 3.3 20th 24.0 86.3 very low 28%
Viewbank 21.5 33.5 21st 9.6 2.8 7th 20.0
Wallan 17.3 +1.8 30.3 21st 6.9 +0.4 2.3 4th 7.8 50.1 very low 16%
Wonthaggi 18.8 +0.8 28.0 27th 9.0 +0.2 4.6 20th 68.5 87.6 normal 78%
West Central (district 87)
Avalon Airport 21.2 +1.6 30.8 27th 8.4 +0.6 1.2 18th 18.8 51.0 very low 37%
Geelong Airport 19.7 +1.2 29.4 27th 7.7 +0.1 1.1 18th 23.0 55.2 low 42%
Laverton RAAF 21.8 +2.7 35.0 21st 8.9 +0.7 1.3 7th 14.2 57.5 very low 25%
Point Wilson 18.0 +0.6 27.5 21st 10.4 -0.2 5.8 7th
Sheoaks 19.1 +1.4 33.5 21st 7.3 +0.1 0.3 7th 24.6 55.8 very low 44%
North Central (district 88)
Castlemaine Prison 20.3 +1.3 34.3 21st 6.7 +0.2 -1.0 7th 6.8 60.0 very low 11%
Eildon Fire Tower 18.1 +2.0 30.6 21st 8.0 +1.0 3.0 13th 20.8 51.5 very low 40%
Lake Eildon 21.4 +1.8 33.0 21st 7.5 +0.3 0.4 8th 18.8 79.6 very low 24%
Mangalore Airport 23.2 +2.9 36.3 21st 6.8 -0.4 -0.3 4th 4.0 48.5 very low 8%
Maryborough 21.6 +1.6 35.0 21st 7.9 +0.7 2.5 17th 3.2 49.0 very low 7%
Redesdale 21.0 +2.2 34.5 21st 5.0 -0.3 -2.1 7th 6.8 52.7 very low 13%
Western Plains (district 89)
Ararat Prison 19.3 +1.5 33.9 21st 5.6 -0.4 -3.1 7th 14.2 59.5 very low 24%
Ballarat Aerodrome 17.9 +1.4 29.7 21st 5.6 -0.6 -2.4 7th 14.2 68.0 very low 21%
Westmere 18.7 33.1 21st 4.8 -2.5 17th 24.2
West Coast (district 90)
Aireys Inlet 19.0 +1.3 29.3 27th 9.0 -0.2 3.9 7th 26.0 62.8 very low 41%
Cape Nelson Lighthouse 17.1 +0.1 26.6 18th 9.9 -0.4 6.1 20th 52.8 49.8 normal 106%
Cape Otway Lighthouse 16.7 +0.4 26.1 18th 9.6 -0.1 5.2 7th 57.8 80.1 normal 72%
Casterton 18.4 31.3 21st 6.7 -0.6 9th 34.6
Casterton Showgrounds 19.0 +0.1 32.5 21st 7.3 0 1.1 9th 39.2 59.0 normal 66%
Colac 17.1 28.6 21st 6.9 1.5 7th 21.6
Hamilton Airport 18.2 +0.7 32.3 21st 6.1 -0.4 -0.1 7th 28.0 58.8 very low 48%
Mortlake Racecourse 18.3 +0.7 31.4 21st 5.8 -0.4 -1.2 17th 25.4 54.9 low 46%
Port Fairy AWS 18.3 +0.3 27.5 27th 8.7 -0.5 3.1 20th 55.4 52.2 normal 106%
Portland 16.7 0 27.6 21st 7.9 -0.4 3.5 20th 38.2 62.1 low 62%
Warrnambool Airport Ndb 17.5 -0.1 28.0 21st 7.1 +0.1 0.9 17th 39.0 66.6 low 59%
Weeaproinah 13.8 +0.3 25.5 21st 6.1 -0.5 2.3 7th 156.4 174.9 normal 89%

Notes

This statement has been prepared based on information available at 11 am on Thursday 1 November 2007. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals are long-term means based on observations from the years 1895 to date. They are not shown for sites with less than 10 years of record in that time, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of "normal" 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, normal in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of normal shows how much rain has fallen this time as a percentage of the long-term mean.

Further information

Dr Harvey Stern
Climate Meteorologist
Victoria Climate Services Centre
Bureau of Meteorology
Phone (03) 9669 4956
Email climate.vic@bom.gov.au