Victoria in December 2012: Rainfall less than that usually received

Highlights:

  • Overnight temperatures slightly warmer than those in most years
  • Daytime temperatures warmer than those in most years
  • Rainfall less than that in most years

Summary

Bureau of Meteorology data show that across the State of Victoria, overnight minimum temperatures were slightly warmer than those usually experienced. Daytime maximum temperatures at most localities were warmer than those registered in the past. Total rainfall was generally less than that usually recorded.

Over the northern plains, minimum temperatures were near to those usually experienced (average departure from normal 0.3C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.2C). Total rainfall was generally much less than that usually recorded (average percentage of normal received 49.8%).

In southern districts, minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.6C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.2C). Total rainfall was generally less than that usually recorded (average percentage of normal received 60.3%).

Details

In the Mallee, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.9C). Daytime maximum temperatures at most localities were much warmer than those registered in the past (average departure from normal 1.9C). Total rainfall was generally much less than that usually recorded (average percentage of normal received 27.5%).

In the Wimmera, overnight minimum temperatures were near to those usually experienced (average departure from normal -0.4C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1C). Total rainfall was generally less than that usually recorded (average percentage of normal received 55.5%).

In the Northern Country, overnight minimum temperatures were warmer than those usually experienced (average departure from normal 1.2C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.2C). Total rainfall was generally less than that usually recorded (average percentage of normal received 54%).

In Victoria's North Central District, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.6C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.3C). Total rainfall was generally much less than that usually recorded (average percentage of normal received 44%).

In the North East District, overnight minimum temperatures were near to those usually experienced (average departure from normal -0.4C). Daytime maximum temperatures at most localities were slightly warmer than those registered in the past (average departure from normal 0.8C). Total rainfall was generally less than that usually recorded (average percentage of normal received 62%).

In East Gippsland, overnight minimum temperatures were warmer than those usually experienced (average departure from normal 1C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1C). Total rainfall for the month was generally much less than that usually recorded (average percentage of normal received 47%).

In West Gippsland, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.5C). Daytime maximum temperatures at most localities were much warmer than those registered in the past (average departure from normal 1.6C). Total rainfall for the month was generally slightly less than that usually recorded (average percentage of normal received 86.5%).

In the Central District, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.7C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.3C). Total rainfall for the month was generally less than that usually recorded (average percentage of normal received 55.3%).

In the Western District, overnight minimum temperatures were near to those usually experienced (average departure from normal 0.4C). Daytime maximum temperatures at most localities were slightly warmer than those registered in the past (average departure from normal 0.9C). Total rainfall for the month was generally less than that usually recorded (average percentage of normal received 55%).

Melbourne climate summary for the month of December 2012

Rainfall less than that usually received.

Located in the Central District at the head of Port Phillip Bay, Melbourne is Victoria's State Capital. Here, overnight minimum temperatures were much warmer than those usually experienced and averaged 15.1C (departure from normal 2.2C). That the overnight temperatures in Melbourne are higher than those in most surrounding localities is a consequence of the city being under the influence of the effect of urbanisation (cities are usually warmer than their rural surroundings, especially at night, because of heat stored in bricks and concrete and trapped between close-packed buildings). Daytime maximum temperatures were much warmer than those usually experienced and averaged 25.7C (departure from normal 1.5C). Total rainfall for the month was 30 mm, this being less than that usually recorded (normal 59.3 mm, percentage of normal received 51%).

Some 20 kilometres northwest of the Melbourne city centre, and located in a somewhat rural setting, Melbourne Airport, is more typical of the suburban areas of Melbourne. Here, overnight minimum temperatures were slightly warmer than those usually experienced and averaged 12.5C (departure from normal 0.5C). Daytime maximum temperatures were much warmer than those usually experienced and averaged 26C (departure from normal 1.6C). Total rainfall for the month was 18.6 mm, this being much less than that usually recorded (normal 48.8 mm, percentage of normal received 38%).

Rainfall

There is a map of total rainfall below.

There is a map of rainfall deciles below.

Temperature

Maximum temperature

There is a map of mean maximum temperatures below.

There is a map of maximum temperature anomalies below.

Minimum temperature

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

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

Some sites had their highest December 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.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in December 2012
Hottest day 41.9 C at Mildura Airport on the 19th
41.9 C at Walpeup Research on the 23rd
Warmest days on average 32.4 C at Mildura Airport
Coolest days on average 13.3 C at Mount Hotham
Coldest day -0.2 C at Mount Baw Baw on the 4th
Coldest night -3.7 C at Dinner Plain (Mount Hotham Airport) on the 10th
Coolest nights on average 4.9 C at Mount Baw Baw
Warmest nights on average 15.5 C at Mildura Airport
Warmest night 27.4 C at Melbourne Regional Office on the 24th
Warmest on average overall 23.9 C at Mildura Airport
Coolest on average overall 9.2 C at Mount Baw Baw
9.2 C at Mount Hotham
Wettest overall 176.5 mm at Phillip Island Penguin Reserve
Highest wind gust 159 km/h at Wilsons Promontory Lighthouse on the 5th


Record highest December daily minimum temperature
Highest daily minimum
temperature
in December 2012 (C)
Previous warmest
for December
Years of
record
Average for
December
Laverton RAAF 26.0 on the 24th = 26.0 on the 7th in 1994 70 11.9
Melbourne Regional Office 27.4 on the 24th 27.2 on the 28th in 1961 158 12.9
Ararat Prison 22.8 on the 13th 22.2 on the 22nd in 1976 44 9.3
Essendon Airport 25.9 on the 24th 24.9 on the 4th in 1970 43 11.7
Bairnsdale Airport 21.3 on the 24th 20.1 on the 27th in 1991 32 11.1
Viewbank 23.8 on the 24th 22.8 on the 10th in 2003 14 12.4
Orbost 22.1 on the 24th 22.0 on the 8th in 2010 13 12.5



Record highest December mean daily minimum temperature
Mean daily minimum
temperature
for December 2012 (C)
Previous warmest
for December
Years of
record
Average for
December
Stawell Aerodrome 12.5 = 12.5 in 2003 16 11.1

Highest December mean daily minimum temperature for at least 10 years
Mean daily minimum
temperature
for December 2012 (C)
Most recent December
at least this warm
Years since
warmer
Average for
December
Ararat Prison 11.0 12.1 in 1992 20 9.3
Phillip Island Penguin Reserve 13.1 =13.1 in 1994* 17 11.9

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




Summary statistics for December 2012
Maximum temperatures
for December
(C)
Minimum temperatures
for December
(C)
Rainfall
for December
(millimetres)
Mean for
December
2012
Diff
from
average
Highest for
December
2012
Mean for
December
2012
Diff
from
average
Lowest for
December
2012
Total for
December
2012
Average
for
December
Rank of
December
2012
Fraction of
December
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 29.8 +0.7 37.8 24th 13.9 +0.2 6.8 6th 27.8 40.8 average 68%
Hume Reservoir 28.9 +0.4 36.5 24th 14.2 -0.1 7.9 6th 28.0 49.5 average 57%
North Mallee (district 76)
Mildura Airport 32.4 +2.3 41.9 19th 15.5 +0.7 9.6 6th 4.2 25.4 low 17%
Ouyen (Post Office) 31.6 +1.5 41.5 19th 14.6 +0.9 8.7 3rd 9.0 25.7 average 35%
Walpeup Research 31.3 +1.6 41.9 23rd 14.2 +0.7 8.0 3rd 4.2 24.9 low 17%
South Mallee (district 77)
Hopetoun Airport 30.7   41.0 13th 13.0   6.1 6th 5.2
Swan Hill Aerodrome 31.3 +1.2 40.9 23rd 13.9 +0.6 6.6 6th 9.4 22.2 average 42%
North Wimmera (district 78)
Nhill Aerodrome 28.8   40.6 23rd 12.2   5.4 10th 30.4 32.5 average 94%
Warracknabeal Museum 29.4 +0.8 39.6 23rd 12.5 +0.3 6.2 17th 14.2 28.4 average 50%
South Wimmera (district 79)
Edenhope Airport 26.9   39.6 23rd 11.3   4.6 10th 20.6
Grampians (Mount William) 18.2   31.3 23rd 7.1   1.1 4th 59.2
Horsham Aerodrome 28.8 +0.5 41.2 23rd 10.4 0.0 3.9 10th 15.4 27.8 low 55%
Kanagulk 27.3   40.0 23rd 11.1   4.0 17th 33.2
Longerenong 28.9 +1.2 41.0 23rd 11.0 -0.2 3.7 17th 16.4 28.1 average 58%
Pyrenees (Ben Nevis) 23.0   33.7 13th 9.4   3.7 4th 22.0
Stawell Aerodrome 26.8 +0.5 38.1 23rd 12.5 +1.4 6.2 17th 18.2 38.2 low 48%
Lower North (district 80)
Charlton 30.1   40.2 23rd 13.1   6.7 17th 9.2
Echuca Aerodrome 30.2 +1.3 39.9 23rd 13.7 +0.3 9.7 17th 11.8 29.2 average 40%
Kerang 30.7 +1.0 40.9 23rd 14.7 +1.3 9.0 6th 15.6 27.4 average 57%
Kyabram 29.4 +1.5 39.3 23rd 13.3 +0.9 7.5 6th 14.0 32.3 average 43%
Upper North (district 81)
Bendigo Airport 28.4 +1.5 38.0 23rd 12.6 +1.0 5.9 17th 20.8 42.2 average 49%
Shepparton Airport 29.3 +0.7 39.0 23rd 13.5 +1.1 9.2 3rd 15.2 32.5 average 47%
Tatura Inst Sustainable Ag 28.4 +1.1 37.6 23rd 13.1 +0.9 7.3 3rd 14.2 34.2 average 42%
Yarrawonga 30.3 +0.6 39.6 23rd 13.8 +0.8 7.0 6th 39.8 40.7 average 98%
Lower Northeast (district 82)
Benalla Airport 29.1   38.0 23rd 13.1   6.8 3rd 25.5
Corryong Airport 29.0   36.0 24th 10.3   1.2 6th 27.0
Dartmouth Reservoir 27.1 +0.4 33.4 23rd 11.6 0.0 7.2 18th 57.6 73.1 average 79%
Hunters Hill 23.4 +0.8 29.1 23rd 11.7 0.0 3.7 5th 70.8 78.6 average 90%
Rutherglen Research 29.9 +0.8 36.9 23rd 11.1 -0.3 4.4 6th 32.2 44.2 average 73%
Strathbogie 25.5 +1.0 34.7 23rd 10.0 +0.7 4.8 3rd 30.4 56.4 average 54%
Wangaratta Aero 29.6 +0.7 39.0 23rd 12.0 +0.4 5.9 3rd 24.2 41.9 average 58%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 19.9 +0.5 26.5 23rd 5.8 -0.4 -3.7 10th 50.6 65.8 average 77%
Edi Upper 28.5 +1.5 34.8 27th 10.5 -0.9 3.8 6th 39.2 74.0 average 53%
Falls Creek 14.9 0.0 20.5 23rd 6.1 +0.1 -1.9 6th 120.0 106.2 average 113%
Mount Buller 14.6 +0.2 21.9 23rd 6.1 +0.1 -1.5 5th 108.0 95.5 average 113%
Mount Hotham 13.3 -0.2 18.8 24th 5.0 -0.4 -2.8 6th 172.8 110.0 high 157%
Omeo 24.6   31.9 23rd 8.3   -1.0 6th 31.8
East Gippsland (district 84)
Combienbar AWS 23.1 +0.3 35.2 23rd 11.1 0.0 5.5 5th 55.6 69.0 average 81%
Gabo Island Lighthouse 20.7 +0.8 25.9 24th 15.3 +1.0 10.0 5th 26.4 66.9 low 39%
Gelantipy 21.3 +0.2 31.5 23rd 9.2 -0.2 1.4 10th 47.8 65.0 low 74%
Lakes Entrance (Eastern Beach Road) 23.7   34.5 13th 12.8   6.9 10th 42.4
Mallacoota 22.8 +0.9 35.8 24th 13.9 +0.5 7.9 11th 43.4 71.0 average 61%
Mount Nowa Nowa 23.9 +1.7 36.3 23rd 12.2 +0.3 7.1 5th 23.8 78.1 v low 30%
Orbost 24.8 +1.2 35.6 13th 12.7 +0.2 6.6 10th 42.8 66.4 low 64%
Point Hicks (Lighthouse) 23.8 +1.9 33.8 24th 13.6 -0.5 8.8 30th 41.5 72.0 low 58%
West Gippsland (district 85)
Bairnsdale Airport 25.4 +1.9 37.4 23rd 11.2 +0.1 4.8 10th 25.6 59.0 v low 43%
East Sale Airport 25.0 +1.7 38.9 13th 11.3 0.0 6.9 10th 31.4 54.0 low 58%
Morwell (Latrobe Valley Airport) 25.2 +1.2 37.2 13th 11.1 0.0 4.3 10th 74.2 68.1 average 109%
Mount Baw Baw 13.4 -0.6 23.3 23rd 4.9 -0.6 -2.4 5th 130.0 152.0 low 86%
Mount Moornapa 24.5 +1.9 37.7 23rd 11.4 +0.3 6.5 5th 32.0 53.3 low 60%
Pound Creek 22.7   36.1 23rd 11.5   4.5 22nd 57.2
Willow Grove (Blue Rock Reservoir) 23.2 -0.5 35.0 23rd 10.8 -0.6 4.7 5th 68.4 64.3 average 106%
Wilsons Promontory Lighthouse 20.4 +1.6 32.5 23rd 13.6 +1.0 8.1 5th 72.6 63.8 average 114%
Yarram Airport 24.1   37.1 23rd 11.4   4.2 10th 55.6
East Central (district 86)
Bundoora (Latrobe University) 25.7 +1.0 38.9 23rd 13.0 +0.7 8.3 22nd 25.7 64.8 low 40%
Cerberus 23.2 +1.0 37.3 23rd 11.8 0.0 6.1 22nd 52.8 52.7 average 100%
Coldstream 25.4 +0.5 37.2 23rd 10.1 +0.6 4.5 30th 34.0 54.9 low 62%
Coldstream Comparison 25.3   37.1 23rd 10.0   4.3 30th 34.0
Cranbourne Botanic Gardens 24.9 +1.6 37.5 23rd 11.4 -0.3 6.8 22nd 57.3 65.5 average 87%
Essendon Airport 26.1 +1.8 39.0 23rd 13.3 +1.6 8.7 17th 18.0 51.4 low 35%
Ferny Creek 21.7   33.7 23rd 11.2   5.9 4th 53.0
Frankston AWS 22.7 +0.4 35.3 23rd 13.8 +0.1 8.4 5th
Melbourne Airport 26.0 +1.6 39.2 23rd 12.5 +0.5 7.7 17th 18.6 48.8 low 38%
Melbourne Regional Office 25.7 +1.5 38.3 23rd 15.1 +2.2 11.8 17th 30.0 59.3 low 51%
Moorabbin Airport 24.8 +1.0 37.9 23rd 13.2 +0.7 8.2 10th 36.8 59.1 low 62%
Phillip Island Penguin Reserve 22.8 +1.1 36.4 23rd 13.1 +1.2 7.0 22nd 176.5 54.4 highest 324%
Rhyll 22.6 +1.0 35.2 23rd 14.0 +0.4 9.1 4th 49.8 44.7 average 111%
Scoresby Research Institute 25.5 +1.6 38.5 23rd 12.3 +0.5 7.1 10th 40.6 76.0 low 53%
Viewbank 26.4 +1.1 39.0 23rd 13.0 +0.6 8.3 22nd 21.8 68.6 v low 32%
Wallan (Kilmore Gap) 24.0 +2.4 35.4 23rd 10.9 +1.0 6.4 4th 29.2 46.8 average 62%
Wonthaggi 22.9 +1.0 36.5 23rd 12.4 +0.8 7.0 10th 73.6 61.2 average 120%
West Central (district 87)
Avalon Airport 25.5 +1.5 38.8 23rd 11.9 +0.3 7.1 22nd 32.4 29.6 average 109%
Breakwater (Geelong Racecourse) 24.5   38.3 23rd 12.1   7.3 21st 24.2
Laverton RAAF 25.0 +1.3 38.6 23rd 12.8 +0.9 7.0 17th 29.8 46.0 average 65%
Sheoaks 24.8 +1.5 36.7 23rd 10.2 -0.1 4.5 21st 37.6 32.5 average 116%
North Central (district 88)
Castlemaine Prison 26.4 +1.1 36.2 23rd 11.7 +0.9 3.8 17th 19.2 41.6 low 46%
Eildon Fire Tower 24.5 +1.0 34.5 23rd 11.3 +0.3 5.2 5th 44.2 42.3 average 104%
Lake Eildon 27.1 +0.9 36.6 23rd 11.6 +0.7 6.1 10th 55.2 56.1 average 98%
Mangalore Airport 28.5 +1.6 38.0 23rd 12.8 +1.0 9.0 3rd 17.0 40.7 low 42%
Maryborough 27.5 +0.9 37.5 8th 11.4 +0.1 6.0 17th 17.4 37.7 low 46%
Redesdale 28.3 +2.1 38.2 23rd 10.6 +0.6 4.8 17th 18.2 38.0 average 48%
Western Plains (district 89)
Ararat Prison 26.0 +1.6 37.6 23rd 11.0 +1.7 4.0 17th 37.9 38.5 average 98%
Ballarat Aerodrome 23.6 +1.1 34.6 23rd 10.0 +0.6 4.1 17th 33.6 50.9 average 66%
Westmere 26.2   40.2 23rd 9.4   1.9 21st 22.2
West Coast (district 90)
Aireys Inlet 22.8 +1.9 36.4 13th 12.3 +0.1 8.2 17th 56.8 40.4 high 141%
Cape Nelson Lighthouse 20.7 +1.2 30.5 23rd 13.7 +0.7 7.5 21st 39.4 42.5 average 93%
Cape Otway Lighthouse 21.1 +1.2 34.4 13th 13.1 +1.1 9.6 4th 43.6 53.2 average 82%
Casterton 25.2   39.2 23rd 10.5   4.2 17th 18.4
Colac (Mount Gellibrand) 24.2 +1.3 39.0 23rd 10.9 +0.3 6.7 4th 60.8 40.0 high 152%
Dartmoor 24.6   40.1 23rd 11.0   5.2 21st 41.8
Hamilton Airport 25.1 +1.2 38.9 23rd 9.8 +0.4 3.8 10th 26.2 45.7 average 57%
Mortlake Racecourse 24.5 +1.4 38.2 23rd 9.2 0.0 2.6 11th 45.0 45.2 average 100%
Port Fairy AWS 22.3 +1.2 34.1 12th 13.0 +0.6 7.7 21st 56.4 43.7 high 129%
Portland (Cashmore Airport) 21.4 +1.3 35.1 23rd 11.5 +0.6 5.3 22nd 55.0 51.2 average 107%
Portland NTC AWS 20.2   30.2 23rd 13.6   8.8 21st
Warrnambool Airport NDB 23.2 +0.7 38.9 23rd 10.6 +0.6 4.1 22nd 41.8 49.9 average 84%

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 9 am on Thursday 3 January 2013. 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