Victoria in Autumn 2013:

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 (average departure from normal 0.7 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.3 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally less than that usually recorded (average percentage of normal received 53.7%).

A feature of the season was a sustained heatwave early in March.

Over the northern plains, minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.7 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally less than that usually recorded (average percentage of normal received 50.2%).

In southern districts, minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.6 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.2 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally less than that usually recorded (average percentage of normal received 57.9%), although the west coast experienced a very wet spell during May, on account of a persistent low pressure system.

Details

In the Mallee, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.9 °C). Daytime maximum temperatures at most localities were much warmer than those registered in the past (average departure from normal 1.6 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally much less than that usually recorded (average percentage of normal received 35.5%).

In the Wimmera, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.9 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.1 °C). Total rainfall for the past autumn (March 2013 to May 2013) was generally much less than that usually recorded (average percentage of normal received 37%).

In Victoria's North Central District, overnight minimum temperatures were near to those usually experienced (average departure from normal 0.4 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.3 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally much less than that usually recorded (average percentage of normal received 32%).

In the North East District, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.5 °C). Daytime maximum temperatures at most localities were near to those registered in the past (average departure from normal 0.2 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally slightly less than that usually recorded (average percentage of normal received 86.3%).

In East Gippsland, overnight minimum temperatures were near to those usually experienced (average departure from normal 0.3 °C). Daytime maximum temperatures at most localities were slightly warmer than those registered in the past (average departure from normal 0.9 °C). Total rainfall for the past autumn (March 2013 to May 2013) was generally less than that usually recorded (average percentage of normal received 60.5%).

In West Gippsland, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.7 °C). Daytime maximum temperatures at most localities were slightly warmer than those registered in the past (average departure from normal 0.8 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally slightly less than that usually recorded (average percentage of normal received 69%).

In the Central District, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.7 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.4 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was generally less than that usually recorded (average percentage of normal received 62%).

In the Western District, overnight minimum temperatures were slightly warmer than those usually experienced (average departure from normal 0.6 °C). Daytime maximum temperatures at most localities were warmer than those registered in the past (average departure from normal 1.4 °C). Total rainfall for the past autumn (March 2013 to May 2013) was generally much less than that usually recorded (average percentage of normal received 38%).

Melbourne climate summary for the past autumn (Mar 2013 to May 2013)

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 12.9 °C (departure from normal 2 °C). 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 22.4 °C (departure from normal 2.1 °C). Total rainfall for the past autumn (Mar 2013 to May 2013) was 106 mm, this being less than that usually recorded (normal 163.3 mm, percentage of normal received 65%).

Records

Some sites had their lowest total autumn rainfall on record.

Some sites had their lowest total autumn rainfall for at least 10 years.

Some sites had their highest autumn daily rainfall on record.

Some sites had their highest autumn temperature on record.

Some sites had their highest autumn mean daily maximum temperature on record.

Some sites had their highest autumn mean daily maximum temperature for at least 10 years.

Some sites had their warmest autumn night (highest daily minimum temperature) on record.
Extremes in autumn 2013
Hottest day 40.4 °C at Mortlake Racecourse on 11 Mar
Warmest days on average 25.3 °C at Mildura Airport
Coolest days on average 8.4 °C at Mount Hotham
Coldest day -2.1 °C at Mount Hotham on 14 May
Coldest night -5.8 °C at Mount Hotham on 2 May
Coolest nights on average 2.4 °C at Mount Hotham
Warmest nights on average 14.0 °C at Wilsons Promontory Lighthouse
Warmest night 26.5 °C at Melbourne Regional Office on 13 Mar
Warmest on average overall 18.2 °C at Mildura Airport
Coolest on average overall 5.4 °C at Mount Hotham
Wettest overall 555.5 mm at Falls Creek (Rocky Valley)
Highest wind gust 126 km/h at Mount Buller on 21 Mar

Record highest autumn daily rainfall
Highest daily rainfall
in autumn 2013 (mm)
Previous wettest
for autumn
Years of
record
Myrhee (Handcocks) 101.4 on 22 Mar 73.8 on 1 Mar 2012 13
Whitfield (King River at Cheshunt) 94.8 on 22 Mar 89.0 on 1 Mar 2012 13



Record lowest total autumn rainfall
Total rainfall
for autumn 2013 (mm)
Previous driest
for autumn
Years of
record
Average for
autumn
Alexandra (Post Office) 44.8 47.9 in 1912 135 163.0
Meredith 45.2 56.4 in 2005 112 156.4
Natte Yallock 26.2 27.6 in 2005 112 105.8
Beeac (Post Office) 37.6 49.3 in 2005 108 138.0
Tubbut 39.0 42.5 in 1933 67 144.1
Lima South (Lake Nillahcootie) 35.2 36.8 in 2005 44 197.1
Simpson South 91.8 120.4 in 2005 44 227.9
Altona (City Offices) 63.0 72.2 in 2008 37 132.3
Acheron River @ Taggerty 16.4 31.4 in 2008 18 132.4
Moorabool River at Lal Lal 15.0 35.8 in 2005 13 96.8
Tanjil River @ Tanjil South 62.4 69.2 in 2007 13 159.0
Boonah 44.8 45.6 in 2005 12 159.9
Campaspe River @ Redesdale 5.6 21.8 in 2004 12 91.7
Morwell River at Boolarra 77.6 83.0 in 2005 12 158.3
Moe River at Darnum 24.0 56.2 in 2007 11 168.9
Coonooer Bridge (Avoca River at Yawong W 7.0 14.2 in 2004 10 47.4

Lowest total autumn rainfall for at least 10 years
Total rainfall
for autumn 2013 (mm)
Most recent autumn
at least this dry
Years since
drier
Average for
autumn
Cairn Curran Reservoir 33.0 28.7 in 1967 46 109.4
Great Western (Seppelt) 49.2 43.6 in 1976* 33 122.1
Apsley (Post Office) 74.6 71.4 in 1996* 15 120.0
Cheyns Bridge (Macalister River @ String 70.4 41.0 in 2001* 11 127.1

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




Record highest autumn temperature
Highest temperature
in autumn 2013 (°C)
Previous warmest
for autumn
Years of
record
Average for
autumn
Mortlake Racecourse 40.4 on 11 Mar 40.3 on 17 Mar 2008 22 19.9



Record highest autumn mean daily maximum temperature
Mean daily maximum
temperature
for autumn 2013 (°C)
Previous warmest
for autumn
Years of
record
Average for
autumn
Ararat Prison 21.3 21.2 in 1988 43 19.5
Portland (Cashmore Airport) 20.1 19.5 in 2007 30 18.4
Aireys Inlet 20.8 20.6 in 2007 21 18.8
Mortlake Racecourse 22.0 21.6 in 2007 21 19.9
Port Fairy AWS 20.9 20.3 in 2008 21 19.2
Sheoaks 21.0 = 21.0 in 2007 21 19.1
Avalon Airport 22.3 22.2 in 2007 17 20.5
Mount Nowa Nowa 20.3 20.1 in 2005 17 19.1
Cape Nelson Lighthouse 19.7 19.2 in 2008 16 18.1
Warrnambool Airport NDB 21.6 20.8 in 2007 14 19.8
Colac (Mount Gellibrand) 20.9 20.3 in 2007 12 18.9
Orbost 21.8 21.5 in 2010 12 20.7

Highest autumn mean daily maximum temperature for at least 10 years
Mean daily maximum
temperature
for autumn 2013 (°C)
Most recent autumn
at least this warm
Years since
warmer
Average for
autumn
Cape Otway Lighthouse 19.2 19.8 in 1898* 114 18.0

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




Record highest autumn daily minimum temperature
Highest daily minimum
temperature
in autumn 2013 (°C)
Previous warmest
for autumn
Years of
record
Average for
autumn
Melbourne Regional Office 26.5 on 13 Mar 26.3 on 3 Mar 1927 159 10.9
Scoresby Research Institute 26.1 on 13 Mar 25.2 on 18 Mar 2008 47 10.2
Essendon Airport 25.3 on 13 Mar 25.1 on 18 Mar 2008 45 9.9
Melbourne Airport 24.3 on 13 Mar = 24.3 on 18 Mar 2008 43 10.4
Bundoora (Latrobe University) 26.2 on 13 Mar 24.7 on 18 Mar 2008 31 10.0
Cranbourne Botanic Gardens 24.0 on 13 Mar 21.5 on 5 Apr 1992 24 10.3
Bendigo Airport 23.9 on 13 Mar 20.7 on 19 Mar 2003 22 8.1
Redesdale 21.5 on 13 Mar 20.9 on 7 Mar 1995 20 7.6
Swan Hill Aerodrome 23.2 on 13 Mar 23.0 on 13 Mar 1998 17 9.1
Viewbank 25.2 on 13 Mar 22.7 on 15 Apr 2004 14 10.1
Colac (Mount Gellibrand) 23.0 on 7 Mar 22.4 on 19 Mar 2003 13 9.7



Summary statistics for autumn 2013
Maximum temperatures
for autumn
(°C)
Minimum temperatures
for autumn
(°C)
Rainfall
for autumn
(millimetres)
Mean for
autumn
2013
Diff
from
average
Highest for
autumn
2013
Mean for
autumn
2013
Diff
from
average
Lowest for
autumn
2013
Total for
autumn
2013
Average
for
autumn
Rank of
autumn
2013
Fraction of
autumn
average
Southwest Slopes (South) (district 72)
Albury Airport AWS 23.0 +0.5 35.7 11 Mar 8.9 +0.2 -0.2 25 May 108.2 124.4 average 87%
Hume Reservoir 22.5 +0.7 35.4 10 Mar 10.8 +0.6 1.3 25 May 136.8 155.8 average 88%
North Mallee (district 76)
Mildura Airport 25.3 +1.7 38.1 12 Mar 11.0 +0.6 1.1 20 Apr 45.0 63.4 average 71%
Ouyen (Post Office) 25.1 +1.5 38.8 12 Mar 11.0 +1.1 1.8 20 Apr 47.7 73.2 average 65%
South Mallee (district 77)
Hopetoun Airport 24.4   39.0 12 Mar 9.5   -0.9 2 May 22.4
Swan Hill Aerodrome 24.6 +1.0 38.8 27 Mar 10.1 +1.0 0.1 3 May 29.8 57.3 low 52%
North Wimmera (district 78)
Nhill Aerodrome 23.2   39.0 11 Mar 10.1   0.5 2 May 44.6 58.3 low 77%
Warracknabeal Museum 23.5 +1.1 37.8 11 Mar 10.0 +0.9 0.5 2 May 39.1 85.9 low 46%
South Wimmera (district 79)
Edenhope Airport 22.4   39.1 11 Mar 9.9   0.0 2 May 77.2
Grampians (Mount William) 13.5   30.9 11 Mar 6.6   0.5 14 May 199.4
Horsham Aerodrome 23.1 +0.9 38.6 12 Mar 8.2 +0.9 -1.7 5 May 41.0 71.1 v low 58%
Kanagulk 22.4   38.7 12 Mar 9.0   -0.9 2 May 85.2
Longerenong 23.1 +1.5 38.5 12 Mar 8.8 +0.5 -1.1 5 May 44.2 94.9 low 47%
Pyrenees (Ben Nevis) 17.2   33.7 11 Mar 8.7   2.2 14 May 83.0
Stawell Aerodrome 21.5 +0.7 37.1 12 Mar 9.6 +1.1 1.4 2 May 40.8 84.3 v low 48%
Lower North (district 80)
Charlton 23.8   38.5 10 Mar 10.0   1.3 2 May 45.8
Echuca Aerodrome 23.7 +1.3 38.0 27 Mar 10.0 +0.4 1.4 29 May 44.1 103.7 low 43%
Kerang 24.5 +1.7 38.6 27 Mar 10.6 +1.0 2.3 28 May 41.6 88.3 low 47%
Kyabram 23.2 +1.4 37.1 27 Mar 9.9 +0.9 1.2 24 May 44.0 107.3 low 41%
Upper North (district 81)
Bendigo Airport 22.3 +1.1 36.1 11 Mar 9.2 +1.1 -0.1 2 May 69.2 102.5 low 68%
Shepparton Airport 22.9 +0.5 36.3 27 Mar 9.3 +0.8 0.4 6 May 46.0 95.9 low 48%
Tatura Inst Sustainable Ag 22.6 +1.0 35.9 27 Mar 9.0 +0.5 -0.1 6 May 65.2 113.1 low 58%
Yarrawonga 23.2 +0.4 36.0 27 Mar 9.4 +0.3 -0.4 25 May 95.4 94.4 average 101%
Lower Northeast (district 82)
Benalla Airport 22.7   35.6 11 Mar 8.2   -1.0 25 May 77.5
Corryong Airport 21.2   33.8 8 Mar 6.3   -3.3 25 May 147.4
Dartmouth Reservoir 20.8 0.0 33.7 8 Mar 7.7 +0.2 -0.3 25 May 201.8 203.1 average 99%
Hunters Hill 16.9 +0.4 29.0 11 Mar 8.7 +0.3 1.6 19 May 233.8 217.0 average 108%
Rutherglen Research 22.7 +0.6 35.6 8 Mar 6.8 -0.6 -3.4 5 May 152.0 130.4 high 117%
Strathbogie 19.3 +0.3 32.0 11 Mar 6.5 +0.4 -2.2 24 May 122.4 218.8 low 56%
Wangaratta Aero 22.6 +0.1 35.7 8 Mar 7.3 +0.1 -2.0 5 May 129.0 138.0 average 93%
Upper Northeast (district 83)
Dinner Plain (Mount Hotham Airport) 14.6 -0.2 26.5 11 Mar 3.7 +0.3 -4.7 6 May 202.4 142.2 high 142%
Falls Creek 9.8 -0.2 22.4 5 Mar 3.4 +0.2 -3.9 5 May 333.6 271.2 high 123%
Mount Buller 9.9 -0.2 21.7 10 Mar 3.8 +0.1 -3.9 2 May 327.6 308.5 average 106%
Mount Hotham 8.4 -0.2 20.7 8 Mar 2.4 -0.3 -5.8 2 May 480.2 328.4 high 146%
Omeo 18.9   31.0 12 Mar 4.9   -4.8 25 May 88.8
East Gippsland (district 84)
Combienbar AWS 18.8 +1.1 31.3 12 Mar 10.4 +0.8 3.9 19 Apr 216.6 224.2 average 97%
Gabo Island Lighthouse 19.8 +0.8 26.0 28 Apr 13.6 +0.2 8.1 3 May 108.0 256.6 v low 42%
Gelantipy 17.3 +0.9 30.0 12 Mar 7.6 +0.6 -0.4 6 May 145.2 164.8 average 88%
Lakes Entrance (Eastern Beach Road) 20.6   35.0 27 Mar 10.8   3.4 3 May 151.4
Mallacoota 20.6 +0.8 32.5 27 Mar 12.1 +0.5 5.1 15 May 137.2 251.5 low 55%
Mount Nowa Nowa 20.3 +1.2 33.6 27 Mar 11.5 +0.9 5.3 25 May 147.8 194.5 low 76%
Orbost 21.8 +1.1 36.0 27 Mar 11.0 +0.4 4.2 14 May 135.6 185.2 low 73%
Point Hicks (Lighthouse) 20.8 +1.2 35.8 27 Mar 13.5 +0.4 7.9 15 May 185.8 247.4 average 75%
West Gippsland (district 85)
Bairnsdale Airport 21.6 +0.9 36.1 27 Mar 9.2 +0.4 0.3 22 May 117.2 146.8 average 80%
East Sale Airport 21.3 +1.1 35.4 10 Mar 8.8 0.0 -0.4 3 May 101.4 149.7 low 68%
Morwell (Latrobe Valley Airport) 21.7 +1.2 37.0 12 Mar 8.6 -0.2 -0.3 3 May 115.8 161.3 low 72%
Mount Baw Baw 9.6 -0.5 23.2 8 Mar 3.8 0.0 -3.2 2 May 296.6 369.1 average 80%
Pound Creek 21.3   37.0 12 Mar 9.9   0.3 24 May 147.4
Willow Grove (Blue Rock Reservoir) 20.5 +0.7 35.5 12 Mar     3.0 24 May 110.5 164.4 low 67%
Wilsons Promontory Lighthouse 18.6 +1.4 34.0 27 Mar 14.0 +1.4 9.0 14 May 175.6 267.1 low 66%
Yarram Airport 21.3   35.8 27 Mar 9.0   -0.7 3 May 114.8
East Central (district 86)
Bundoora (Latrobe University) 21.4 +1.0 35.9 12 Mar 10.5 +0.5 2.0 23 May 107.3 151.5 low 71%
Cerberus 21.2 +1.6 37.1 12 Mar 10.5 +0.3 1.5 22 May 142.8 180.1 low 79%
Coldstream 21.9 +1.3 36.2 11 Mar 7.6 +0.4 -2.3 6 May 117.2 173.7 v low 67%
Coldstream Comparison 21.9   36.1 11 Mar 7.5   -2.4 6 May 116.8
Cranbourne Botanic Gardens 21.3 +1.5 36.8 12 Mar 11.0 +0.7 3.0 24 May 153.9 180.1 average 85%
Essendon Airport 21.9 +1.9 37.3 11 Mar 11.3 +1.4 2.2 28 May 109.2 143.5 average 76%
Ferny Creek 17.7   32.9 11 Mar 10.7   3.4 6 May 220.8
Frankston AWS 20.3 +1.2 34.7 11 Mar 13.0 +0.6 4.7 24 May
Melbourne Airport 21.7 +1.4 36.9 11 Mar 11.0 +0.6 2.1 6 May 94.0 121.1 average 78%
Melbourne Regional Office 22.3 +2.0 37.1 11 Mar 12.9 +2.0 4.9 24 May 106.0 163.3 low 65%
Moorabbin Airport 21.6 +1.4 37.1 12 Mar 11.0 +0.4 1.7 6 May 114.0 177.3 low 64%
Phillip Island Penguin Reserve 20.2 +0.6 35.1 12 Mar 11.6 +0.8 1.3 24 May 137.1 183.4 low 75%
Rhyll 20.5 +1.2 34.8 12 Mar 13.3 +0.8 7.0 22 May 144.0 171.5 average 84%
Scoresby Research Institute 21.5 +1.4 36.0 11 Mar 10.6 +0.4 1.4 6 May 135.4 212.2 low 64%
Viewbank 21.9 +0.8 37.2 11 Mar 10.6 +0.5 0.9 23 May 108.8 153.6 v low 71%
Wallan (Kilmore Gap) 18.2 +1.3 33.2 11 Mar 9.7 +1.0 3.1 14 May 127.0 158.4 average 80%
Wonthaggi 21.1 +1.5 37.0 12 Mar 11.2 +0.8 3.0 7 May 209.3 238.5 average 88%
West Central (district 87)
Avalon Airport 22.3 +1.8 39.0 12 Mar 10.4 +0.6 1.7 29 May 39.2 97.6 v low 40%
Breakwater (Geelong Racecourse) 22.1   38.3 12 Mar 10.9   3.3 29 May 57.6
Laverton RAAF 21.8 +1.6 37.2 12 Mar 11.0 +1.0 2.2 6 May 72.4 127.1 low 57%
Sheoaks 21.0 +1.9 36.9 11 Mar 9.5 +0.5 0.7 24 May 61.6 93.1 low 66%
North Central (district 88)
Castlemaine Prison 21.0 +0.9 34.8 11 Mar 8.7 +0.9 -1.5 5 May 57.2 130.2 low 44%
Eildon Fire Tower 19.0 +0.9 34.5 11 Mar 9.8 +0.8 3.1 6 May 71.2 134.3 v low 53%
Lake Eildon 21.8 +1.0 35.4 8 Mar 8.4 +0.3 -0.5 6 May 95.8 190.8 v low 50%
Mangalore Airport 22.6 +1.2 36.6 11 Mar 9.1 +0.2 -0.4 3 May 55.8 128.6 low 43%
Maryborough 22.1 +1.4 36.6 11 Mar 9.1 +0.6 0.7 19 May 51.8 119.0 low 44%
Redesdale 21.8 +1.3 35.6 27 Mar 8.2 +0.6 -0.6 5 May 81.4 128.9 low 63%
Western Plains (district 89)
Ararat Prison 21.3 +1.8 36.4 12 Mar 8.0 +0.6 -2.5 2 May 61.0 126.0 v low 48%
Ballarat Aerodrome 19.4 +1.6 33.3 11 Mar 8.0 +0.3 -2.5 2 May 64.8 158.6 v low 41%
Westmere 21.4   38.0 11 Mar 7.7   -1.9 6 May 70.8
West Coast (district 90)
Aireys Inlet 20.8 +2.0 39.0 12 Mar 12.5 +0.9 7.1 14 May 72.2 133.5 low 54%
Cape Nelson Lighthouse 19.7 +1.6 40.0 12 Mar 13.0 +0.7 6.1 2 May 182.8 147.0 high 124%
Cape Otway Lighthouse 19.2 +1.2 39.0 12 Mar 13.0 +1.4 7.6 14 May 222.0 217.1 average 102%
Casterton 21.7   38.8 12 Mar 9.6   0.0 2 May 90.2
Colac (Mount Gellibrand) 20.9 +2.0 37.8 12 Mar 10.6 +0.9 4.7 21 May 78.8 108.3 low 73%
Dartmoor 21.7   39.6 12 Mar 9.5   -0.1 2 May 167.2
Hamilton Airport 21.3 +1.4 37.8 11 Mar 8.9 +0.6 0.6 2 May 77.6 123.3 low 63%
Mortlake Racecourse 22.0 +2.1 40.4 11 Mar 8.7 +0.7 -1.7 2 May 89.0 123.1 v low 72%
Port Fairy AWS 20.9 +1.7 39.9 12 Mar 11.6 +0.7 3.4 20 Apr 195.2 152.5 high 128%
Portland (Cashmore Airport) 20.1 +1.7 39.1 12 Mar 10.6 +0.7 1.2 20 Apr 207.0 182.7 high 113%
Portland NTC AWS 19.2   36.2 12 Mar 12.7   5.2 2 May
Warrnambool Airport NDB 21.6 +1.8 39.5 12 Mar 10.0 +1.1 0.4 20 Apr 133.2 168.2 low 79%

Notes

A Seasonal 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 2 pm on Monday 3 June 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.

The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

Media
(03) 9669 4057
Enquiries