New South Wales in April 2010: Contrasting rainfall east and west of the Divide

  • 13th warmest April on record for statewide average mean temperatures.
  • 14th warmest April on record for statewide average minimum temperatures.
  • 18th warmest April for statewide average maximum temperatures.
  • Below average rainfall for NSW and the Murray Darling Basin.

Rainfall

In a pattern similar to that of March, rainfall across NSW in April was distinctly contrasted east and west of the Divide. Below to very much below average rainfall was recorded east of the Divide (in particular, coastal NSW), whilst average to above average rainfall was recorded west of the Divide. However, despite western areas of the state recoding above average rainfall, the overall statewide statewide average rainfall was below average. The statewide average total was 31.5 mm, which is below the historical average1of 46.7 mm. The Murray Darling Basin also recorded below average rainfall, with a basin-wide average of 30.1 mm, below the historical average of 38.1 mm. Below average rainfall has now been recorded in eight of the last ten Aprils for both NSW and the MDB.

Slow-moving high pressure systems in the Tasman Sea were a dominant synoptic feature during April, and contributed to the dry conditions along coastal NSW. Persistant northerly flow across the state, generated by these systems, suppressed the moist onshore flow that usually brings rain to coastal areas. A series of low pressure troughs contributed to the rainfall west of the Dividewest, with moist onshore flow bringing some rainfall to the far northern coastal areas.

Some sites had their lowest total April rainfall on record.
See a map of rainfall deciles.

Temperature

Widespread heat was experienced across Australia during April, and NSW was no exception. Both day-time and night-time temperatures were above average throughout the state, particularly early and mid month. With above average maximum and minimum temperatures, the statewide average mean temperature for April was 15.5°C which is 0.9°C above the historical average of 14.6°C. This is the 13th warmest April on record for statewide average mean temperatures.

Under the influence of dominant high-pressure systems, bringing clear skies and warm, northerly winds; the statewide average maximum temperature was 25.0°C which is 0.9°C above the historical average of 24.1°C. This is the 18th warmest April on record for statewide average maximum temperatures.

A build up of heat across the state was reinforced by a lack of cool changes, blocked by persistant high-pressure systems in the Tasman. This, in combination with high humidity, resulted in above to very much above average night-time temperatures. The statewide average minimum temperature for April was 11.9°C which is 0.8°C above the historical average of 11.1°C. This is the 14th warmest April on record for statewide average minimum temperatures.

The above average temperatures experienced during April are consistent with the long-term warming trend in Australia and globally.

Some sites had their highest April mean daily maximum temperature on record.
See a map of maximum temperature anomalies.
Some sites had their warmest April night (highest daily minimum temperature) on record.
Some sites had their highest April mean daily minimum temperature on record.
See a map of minimum temperature anomalies.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in April 2010
Hottest day 34.7 °C at Tibooburra Post Office on the 7th
Warmest days on average 29.3 °C at Mungindi Post Office
Coolest days on average 10.2 °C at Thredbo AWS
Coldest day 2.9 °C at Thredbo AWS on the 27th
Coldest night -8.0 °C at Charlotte Pass (Kosciusko Chalet) on the 26th
Coolest nights on average 0.6 °C at Charlotte Pass (Kosciusko Chalet)
Warmest nights on average 19.0 °C at Lord Howe Island Aero
18.5 °C at Byron Bay (Cape Byron AWS)
Warmest night 24.6 °C at Tibooburra Post Office on the 7th
Wettest overall156.6 mm at Lord Howe Island Aero
Wettest day 71.0 mm at Mullumbimby Creek (Mullumbimby Ck) on the 1st
Highest wind gust 96 km/h at Green Cape AWS on the 25th



Record lowest total April rainfall
Total rainfall
for April 2010 (mm)
Previous lowest
for April
Years of
record
Average for
April
Bellbrook (East Street) 0.4 0.8 in 1914 119 91.8
Guyra (Gowan Brae) 0.0 = 0.0 in 2007 37 53.0



Record highest April mean daily maximum temperature
Mean daily maximum
temperature
for April 2010 (°C)
Previous highest
for April
Years of
record
Average for
April
Lord Howe Island Aero 24.3 24.0 in 1998 21 23.1



Record highest April daily minimum temperature
Highest daily minimum
temperature
in April 2010 (°C)
Previous highest
for April
Years of
record
Average for
April
Tidbinbilla Nature Reserve 15.0 on the 8th = 15.0 on the 3rd in 2009 25 6.5



Record highest April mean daily minimum temperature
Mean daily minimum
temperature
for April 2010 (°C)
Previous highest
for April
Years of
record
Average for
April
Narooma RVCP 15.8 14.4 in 2005 22 12.8



Summary statistics for April 2010
Maximum temperatures
for April
(°C)
Minimum temperatures
for April
(°C)
Rainfall
for April
(millimetres)
Mean for
April
2010
Diff
from
average
Highest for
April
2010
Mean for
April
2010
Diff
from
average
Lowest for
April
2010
Total for
April
2010
Average
for
April
Rank of
April
2010
Fraction of
April
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 26.9   32.6 6th 14.3   7.3 26th 12.0
Tibooburra Airport 28.0   33.8 7th 15.7   8.9 14th 2.8
Tibooburra Post Office 28.1 +1.1 34.7 7th 16.0 +2.1 8.8 14th 8.6 14.7 average 59%
White Cliffs AWS 27.2   33.1 7th 15.5   8.5 14th 19.2
White Cliffs Post Office 27.5 +1.1 33.0 7th 14.4 +2.0 7.0 14th 17.4 15.4 high 113%
Wilcannia (Reid St) 27.0 +0.8 32.3 7th 13.4 +1.7 6.4 13th 25.6 17.3 high 148%
Wilcannia Aerodrome AWS 27.0   32.1 23rd 13.0   6.5 15th 26.0
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 25.1 +1.2 31.2 6th 14.3 +2.5 7.5 13th 25.6 17.4 high 147%
Broken Hill Airport AWS 24.9 +0.6 31.2 6th 13.2 +2.0 6.6 15th 30.4 20.5 high 148%
Lake Victoria Storage 24.3 +0.9 31.0 23rd 12.3 +1.8 6.4 12th 47.8 18.5 v high 258%
Menindee Post Office 26.3 +0.7 32.6 24th 13.1 +2.3 7.4 16th 20.6 16.2 high 127%
Pooncarie Mail Agency 26.0   32.5 5th 12.6   6.4 16th 27.7 17.8 high 156%
Western (Upper Darling) (district 48)
Bourke Airport AWS 27.4   32.4 24th 14.0   5.2 28th 60.6
Brewarrina Hospital 26.3 -1.2 31.6 24th 13.6 +1.0 6.6 26th 51.4 29.6 high 174%
Cobar Airport AWS 25.6   29.8 23rd 12.2   5.0 13th 16.0
Cobar MO 25.6 +0.4 30.3 24th 13.6 +0.7 6.9 13th 41.2 27.0 high 153%
Lightning Ridge Visitors Information Cen 27.5   31.5 24th 14.4   6.5 29th 46.6
Wanaaring Post Office 28.1   33.3 22nd 14.0   7.4 28th 37.4 16.0 high 234%
Western (Southwest Plains) (district 49)
Balranald (RSL) 24.2 +0.2 30.5 23rd 12.0 +2.5 5.8 13th 40.0 23.4 high 171%
Ivanhoe Aerodrome AWS 25.0   31.0 23rd 13.3   7.3 13th 20.4
Ivanhoe Post Office 26.1 +0.3 32.0 23rd 12.1 +1.8 6.0 13th 17.0 19.2 average 89%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 25.4 +0.8 29.7 23rd 12.1 +2.2 6.0 14th 33.0 31.6 average 104%
Condobolin Airport AWS 25.5   30.2 23rd 11.5   5.6 14th 40.2
Peak Hill Post Office 24.8 -0.3 29.0 23rd 13.6 +1.4 7.4 26th 52.8 42.3 high 125%
West Wyalong Airport AWS 24.1   30.0 23rd 10.6   5.1 12th 38.2
Central Western Plains (North) (district 51)
Coonamble Airport AWS 25.8   29.9 24th 12.3   5.3 27th 70.4
Coonamble Comparison 26.1 -0.6 29.8 24th 12.5 +0.8 5.6 28th 73.0 35.9 high 203%
Nyngan Airport 26.2 +0.6 30.5 23rd 12.7 +0.9 6.1 28th 40.8 35.1 high 116%
Trangie Research Station AWS 25.3 +0.9 29.8 23rd 12.5 +1.3 5.5 28th 50.2 40.1 high 125%
Northwest Plains (West) (district 52)
Mungindi Post Office 29.3 +1.7 32.1 11th 13.2 +0.4 6.3 26th 7.8 30.8 average 25%
Walgett Airport AWS 27.3   32.0 24th 12.2   3.2 27th 41.8
Northwest Plains (East) (district 53)
Moree Aero 28.0   31.5 11th 13.7   5.1 26th 12.2
Northwest Slopes (North) (district 54)
Barraba Post Office 26.1 +1.1 28.5 24th 8.6 +0.7 1.3 13th 18.8 39.6 average 47%
Narrabri Airport AWS 26.7   30.1 24th 12.6   5.2 27th 9.4
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 26.1   29.1 23rd 10.8   2.5 27th 26.2
Gunnedah Pool 26.2 -0.2 29.0 23rd 13.1 +1.7 6.0 27th 35.6 37.7 average 94%
Gunnedah Resource Centre 25.6 +0.5 28.2 24th 13.3 +0.5 6.2 13th 34.8 39.5 average 88%
Quirindi Post Office 25.6 +0.7 29.2 23rd 9.2 +0.3 2.4 13th 28.4 42.1 average 67%
Tamworth Airport AWS 26.1   28.6 22nd 10.5   3.5 13th 25.6
Woolbrook (Danglemah Road) 22.0 +0.7 25.2 21st 7.1 +1.6 -0.6 29th 107.7 40.8 v high 264%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 21.2   24.2 23rd 7.1   -1.0 27th 51.4
Armidale Airport AWS 20.7   23.8 10th 8.6   1.4 13th 32.0
Glen Innes Ag Research Stn 21.2 +1.2 23.5 23rd 8.5 +0.5 1.0 27th 26.2 40.5 average 65%
Glen Innes Airport AWS 21.5   24.9 23rd 7.3   -1.6 27th 46.4
Glen Innes Post Office 21.8 +1.1 25.1 2nd 9.9 +2.0 2.0 29th 15.9 42.9 low 37%
Guyra Hospital 19.6 +1.7 22.6 9th 7.4 +0.6 2.4 27th 15.0 52.2 low 29%
Inverell (Raglan St) 26.0   28.4 23rd 8.8   1.5 27th 4.0
Inverell Research Centre 25.6 +2.1 28.3 10th 11.9 +0.9 5.3 29th 5.8 39.5 low 15%
Tenterfield (Federation Park) 22.2 +0.4 27.0 11th 8.8 +0.3 0.0 27th 21.2 46.9 average 45%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 22.8 +0.7 29.7 11th 14.0 +0.5 8.7 27th 80.2 101.8 average 79%
Upper North Coast (district 58)
Alstonville Tropical Fruit Research Stat 24.7 +0.8 31.2 11th 16.5 +0.6 13.2 27th 95.9 193.8 low 49%
Ballina Airport AWS 26.2   30.3 11th 17.0   14.0 30th 110.0
Byron Bay (Cape Byron AWS) 24.6   28.6 11th 18.5   15.7 14th 103.8
Casino Airport 27.1 +0.2 33.7 11th 15.7 +1.7 10.4 27th 43.2 94.9 average 46%
Casino Airport AWS 26.3   33.0 11th 15.3   10.0 27th 40.4
Evans Head RAAF Bombing Range AWS 25.8   33.0 11th 17.1   12.3 27th 66.2
Grafton Airport AWS 26.3   31.5 11th 14.3   7.3 27th 88.4
Grafton Olympic Pool 27.4 +1.2 33.3 11th 15.6 +0.7 9.0 27th 73.4 86.9 average 84%
Grafton Research Stn 26.5   32.0 11th 15.6   9.6 27th 143.2 79.2 high 181%
Lismore (Richmond Hill) 26.2   32.1 11th 16.0   12.4 27th 52.6
Murwillumbah (Bray Park) 26.4 +0.2 31.2 11th 16.8 +1.3 12.4 30th 131.7 161.0 average 82%
Yamba Pilot Station 25.6 +1.4 28.9 11th 17.6 +1.1 12.6 27th 88.6 160.0 low 55%
Lower North Coast (district 59)
Coffs Harbour MO 25.1 +1.1 29.4 24th 15.7 +0.5 9.4 27th 74.4 173.1 low 43%
Dorrigo (Old Coramba Rd) 20.7   25.5 8th 11.1   5.0 27th 61.9
Kempsey (Wide Street) 26.3 +0.8 30.2 11th 14.4 +1.2 9.1 27th 38.1 115.5 low 33%
Kempsey Airport AWS 25.8   30.1 11th 12.8   7.6 27th 31.2
South West Rocks (Smoky Cape Lighthouse) 25.7 +1.7 28.0 11th     14.4 26th 97.4 168.9 average 58%
Manning (district 60)
Forster - Tuncurry R.V.C.P. 25.1   29.0 8th 15.4   11.0 27th 22.3 127.7 v low 17%
Port Macquarie Airport AWS 25.3   29.4 8th 13.9   8.5 27th 27.8
Taree Airport AWS 25.7   29.4 8th 13.7   7.3 27th 17.6
Yarras (Mount Seaview) 25.3 +0.9 29.8 8th 13.0 +0.5 6.2 27th 88.0 141.9 average 62%
Hunter (district 61)
Cessnock (Nulkaba) 25.6 +1.0 30.8 23rd 11.7 0.0 5.2 13th 31.0 58.1 average 53%
Cessnock Airport AWS 24.8   29.3 23rd 10.4   3.4 13th 36.0 48.7 average 74%
Cooranbong (Lake Macquarie AWS) 25.1   30.5 23rd 11.2   5.2 28th 30.2
Gosford (Narara Research Station) AWS 24.1 +0.5 29.4 23rd 12.0 +0.1 6.3 13th 57.0 136.8 low 42%
Jerrys Plains Post Office 25.9 +0.6 30.7 23rd 11.3 +0.4 5.5 13th 35.2 44.0 average 80%
Maitland Visitors Centre 25.8   30.8 23rd 11.5   5.5 27th 21.5
Mangrove Mountain AWS 22.5   27.9 23rd 12.0   6.5 13th 31.0
Merriwa (Roscommon) 23.8   28.6 23rd 9.8   1.8 27th 32.6 33.5 average 97%
Murrurundi Gap AWS 20.7   25.0 22nd 11.3   6.1 13th 30.4
Murrurundi Post Office 23.6 -0.1 27.8 23rd 8.0 -0.5 1.0 13th 27.4 53.0 low 52%
Nelson Bay (Nelson Head) 24.2 +0.6 27.5 11th 17.0 +2.3 13.6 27th 129.9 127.7 average 102%
Newcastle Nobbys Signal Station AWS 23.9 +1.1 30.3 23rd 16.3 +1.0 11.7 27th 22.2 116.3 v low 19%
Newcastle University 25.1   30.5 23rd 14.0   8.3 13th 24.4
Norah Head AWS 23.6   28.3 11th 16.4   12.9 27th 50.4
Paterson (Tocal AWS) 25.9 +1.7 31.5 23rd 12.4 0.0 7.1 27th 23.2 78.2 low 30%
Peats Ridge (Waratah Road) 23.0 +0.9 28.7 23rd 12.6 +0.6 8.0 13th 59.6 125.4 average 48%
Scone Airport AWS 25.1   29.6 23rd 9.9   1.8 27th 55.6
Singleton STP 25.5   30.2 23rd 10.9   4.0 27th 29.6
Williamtown RAAF 24.8 +1.2 30.0 23rd 12.6 -0.6 6.2 27th 26.0 104.5 low 25%
Central Tablelands (North) (district 62)
Gulgong Post Office 23.3 -0.1 27.3 23rd 10.4 +0.6 3.9 28th 58.1 44.5 average 131%
Mudgee Airport AWS 22.5   26.1 23rd 8.8   1.6 28th 73.6
Nullo Mountain AWS 16.8   21.2 23rd 8.9   3.1 13th 100.2
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 21.2 +1.1 25.1 23rd 6.9 +0.2 0.5 13th 59.8 42.0 high 142%
Bathurst Airport AWS 21.0   25.0 23rd 7.3   0.9 28th 97.2
Cowra Research Centre (Evans St) 23.2 +0.7 27.6 23rd 11.1 +0.9 5.2 13th 48.8 42.5 high 115%
Katoomba (Murri St) 18.6 +2.0 23.2 23rd 9.9 +1.2 4.3 26th 33.0 121.7 low 27%
Lithgow (Cooerwull) 19.2   23.1 23rd 7.2   0.0 13th 35.8 58.2 average 62%
Mount Boyce AWS 17.6   21.9 23rd 9.2   3.4 12th 30.2
Oberon (Springbank) 17.1 0.0 20.5 23rd 6.3 +1.0 0.0 26th 46.2 58.0 average 80%
Orange Agricultural Institute 18.5 0.0 21.8 24th 8.1 +0.9 2.5 27th 93.9 53.2 high 177%
Orange Airport AWS 18.3   22.2 23rd 6.7   0.9 26th 70.2
Orange Airport Comparison 18.7 +0.4 22.5 23rd 7.2 +1.0 1.0 28th 45.3 52.5 average 86%
Springwood Bowling Club 23.3   28.7 23rd 13.0   8.8 13th 17.2 87.9 low 20%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 23.5 -0.4 26.6 23rd 7.9 +0.8 0.8 27th 27.4 53.1 average 52%
Coonabarabran Airport AWS 22.1   25.8 23rd 12.0   6.6 13th 28.4
Dunedoo Post Office 24.0 -0.2 28.6 23rd 11.3 +1.6 3.4 13th 40.5 41.7 average 97%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 23.7   29.0 23rd 9.2   3.0 13th 50.0
Cowra Airport Comparison 23.6 0.0 28.4 23rd 9.6 +1.3 3.5 13th 45.8 43.3 high 106%
Dubbo Airport AWS 24.1   28.5 23rd 11.1   3.8 13th 62.2
Forbes Airport AWS 24.8   29.9 23rd 10.6   4.6 14th 41.2
Parkes (Macarthur Street) 24.8 +1.2 29.0 23rd 12.0 +1.0 6.0 12th 28.2 41.5 average 68%
Parkes Airport AWS 24.0   28.0 23rd 10.8   4.0 13th 43.0 31.1 high 138%
Wellington (Agrowplow) 24.2 -0.3 27.8 23rd 10.6 +1.2 3.7 30th 62.6 45.6 high 137%
Metropolitan (East) (district 66)
Bankstown Airport AWS 24.6 +1.0 31.5 22nd 13.3 +0.6 6.9 28th 5.0 82.8 v low 6%
Canterbury Racecourse AWS 24.4   30.0 23rd 13.0   7.0 29th 19.4
Holsworthy Control Range 24.8   30.2 23rd 12.3   5.1 28th 14.8
Parramatta North (Masons Drive) 24.7 +0.9 30.0 22nd 13.1 +0.3 7.6 27th 31.6 86.8 low 36%
Riverview Observatory 24.3 +1.6 30.1 23rd 13.8 +0.9 8.9 27th 37.1 107.0 low 35%
Sydney (Observatory Hill) 24.6 +2.2 30.7 23rd 15.9 +1.2 11.7 27th 29.8 125.8 low 24%
Sydney Airport AMO 24.2 +1.3 30.2 23rd 15.7 +1.6 11.0 27th 33.4 104.7 low 32%
Sydney Harbour (Wedding Cake West) 22.8   27.3 24th 17.0   13.4 27th
Sydney Olympic Park (Sydney Olympic Pk A 24.9   30.7 23rd 15.0   10.4 27th 25.8
Terrey Hills AWS 22.8   28.3 23rd 14.1   10.1 12th 20.6
Metropolitan (West) (district 67)
Badgerys Creek AWS 25.2   30.4 23rd 11.3   4.2 27th 14.6
Horsley Park Equestrian Centre AWS 24.8   29.6 23rd 12.9   7.3 13th 16.2
Liverpool (Michael Wenden Centre) 25.2   30.5 23rd 12.2   1.6 27th 15.6
Penrith Lakes AWS 25.5   31.3 24th 13.1   7.1 27th 15.4
Prospect Reservoir 25.2 +1.6 29.7 23rd 13.3 +0.3 8.1 27th 22.1 74.0 low 30%
Richmond RAAF 24.7   29.6 23rd 11.8   4.6 27th 16.2
Illawarra (district 68)
Albion Park (Wollongong Airport) 23.8   30.0 23rd 12.6   5.0 27th 30.8
Bellambi AWS 22.9   27.6 24th 16.0   12.3 27th 12.6
Bowral (Parry Drive) 19.9 +0.6 25.4 22nd 9.8 +1.8 4.4 13th 11.9 77.7 low 15%
Camden Airport AWS 25.2 +1.4 30.4 23rd 10.9 -0.1 4.0 27th 12.0 64.4 low 19%
Campbelltown (Mount Annan) 25.3   30.8 23rd 11.3   4.5 27th 11.0
Jervis Bay (Point Perpendicular AWS) 21.9   28.9 23rd 15.9   12.0 27th 46.4
Kiama (Bombo Headland) 22.7   27.4 24th 16.0   11.4 27th 54.2
Moss Vale AWS 20.2   25.5 23rd 8.6   0.5 14th 15.2
Nowra RAN Air Station AWS 24.0   30.0 23rd 12.7   6.6 26th 35.4
South Coast (district 69)
Batemans Bay (Catalina Country Club) 23.1   30.0 23rd 10.9   4.9 27th 8.6 66.3 low 13%
Bega AWS 24.4   31.5 23rd 9.8   2.9 14th 2.6
Braidwood Racecourse AWS 20.5   25.5 22nd 6.1   -1.7 13th 7.6
Green Cape AWS 21.6   24.3 23rd 15.5   11.7 12th 33.2
Merimbula Airport AWS 22.7   28.0 23rd 11.1   6.0 14th 15.0
Montague Island Lighthouse 21.3 +0.9 25.4 23rd 16.1 +1.0 13.4 27th 40.8 77.6 average 53%
Moruya Airport AWS 23.1   31.0 23rd 10.7   3.0 27th 6.2
Moruya Heads Pilot Station 22.5 +0.9 29.6 23rd 13.5 +1.2 7.9 27th 8.0 86.7 v low 9%
Narooma RVCP 22.1 +1.1 27.0 11th 15.8 +3.0 10.0 27th 17.0 79.0 low 22%
Nerriga Composite 21.0 +1.6 26.8 22nd 6.0 -0.8 -1.8 26th 9.8 56.9 low 17%
Ulladulla AWS 22.1   29.4 23rd 14.7   9.4 27th 27.8
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 21.2 +2.8 26.1 21st 6.1 +0.9 -1.0 14th 13.0 44.9 low 29%
Bombala AWS 19.3   24.2 23rd 6.7   1.8 27th 12.0
Canberra Airport 21.1   25.4 22nd 7.5   0.2 13th 20.0
Canberra Airport Comparison 21.2 +1.2 25.2 23rd 8.2 +1.5 0.9 13th 18.0 46.0 low 39%
Cooma Airport AWS 19.0   23.4 22nd 3.8   -5.7 14th 5.0 39.0 v low 13%
Cooma Visitors Centre 20.4 +0.9 24.6 22nd 4.8 +0.8 -2.0 30th 6.3 38.7 v low 16%
Goulburn Airport AWS 20.6   25.3 22nd 6.4   -2.0 14th 25.6
Goulburn TAFE 20.7 +0.7 25.2 23rd 7.7 0.0 1.3 14th 19.6 46.1 average 43%
Taralga Post Office 20.2 +1.6 25.2 22nd 5.9 -0.3 -1.2 14th 16.1 59.2 low 27%
Tidbinbilla Nature Reserve 20.1 +1.1 24.5 23rd 7.9 +1.4 1.0 13th 34.8 65.1 average 53%
Tuggeranong (Isabella Plains) AWS 21.4   25.5 21st 7.6   0.0 13th 21.4
Yass (Linton Hostel) 21.6 +0.4 26.2 23rd 7.7 +0.7 0.8 14th 37.6 49.0 average 77%
Southern Tablelands (Snowy Mountains) (district 71)
Charlotte Pass (Kosciusko Chalet) 12.4 +2.0 16.0 16th 0.6 +1.1 -8.0 26th 166.7 154.6 average 108%
Thredbo AWS 10.2 +0.9 13.9 9th 2.5 +1.1 -3.5 26th 109.0 99.1 average 110%
Thredbo Village 15.0 +1.2 18.4 17th 2.9 +1.5 -4.5 26th 139.0 111.2 high 125%
Southwest Slopes (South) (district 72)
Albury Airport AWS 22.5   29.0 23rd 10.2   4.6 13th 36.0
Cabramurra SMHEA AWS 13.3   18.0 19th 6.4   -0.4 12th 95.4
Hume Reservoir 22.6 +1.0 27.8 23rd 12.2 +2.3 6.4 12th 38.8 51.7 average 75%
Khancoban AWS 22.1   26.2 22nd 8.1   2.2 26th 53.8
Tumbarumba Post Office 20.1 +0.1 25.0 23rd 6.5 +1.6 0.5 26th 56.6 66.1 average 86%
Wagga Wagga AMO 23.3 +0.8 29.5 23rd 10.6 +1.5 4.0 13th 38.8 41.3 average 94%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 22.2 +1.3 27.3 22nd 10.9 +1.4 5.3 13th 48.5 65.7 average 74%
Cootamundra Airport 22.5   27.5 23rd 7.9   1.0 13th 38.8
Gundagai (William St) 22.7   27.9 23rd 9.7   3.9 14th 41.4
Quandialla Post Office 24.8 +0.7 29.7 23rd 11.2 +1.6 4.5 12th 38.2 42.0 average 91%
Temora Airport 23.7   29.7 23rd 9.3   2.4 14th 38.8
Wyalong Post Office 24.7 +1.1 29.8 23rd 11.8 +1.8 6.5 12th 30.4 35.8 average 85%
Young Airport 22.6   27.7 23rd 6.8   0.3 13th 42.4
Riverina (East) (district 74)
Corowa Airport 23.6 +1.1 30.4 23rd 10.8 +2.2 4.3 26th 27.3 36.6 average 75%
Deniliquin Airport AWS 23.7   30.2 23rd 11.2   4.5 14th 28.4
Narrandera Airport 24.9   30.6 23rd 11.0   2.7 12th 29.0 35.4 average 82%
Narrandera Golf Club 24.5 +1.1 30.1 23rd 11.2 +1.2 2.6 12th 26.7 39.4 average 68%
Tocumwal Airport 23.4 +0.4 30.0 23rd 11.4 +1.8 4.9 26th 45.7 32.1 high 142%
Yanco Agricultural Institute 25.0   30.5 23rd 13.3   4.8 12th 25.4
Riverina (West) (district 75)
Griffith Airport AWS 24.7 +0.7 30.7 23rd 12.1 +2.0 3.5 12th 20.8 27.8 average 75%
Hay (Miller Street) 24.3 +0.2 30.8 23rd 12.0 +2.1 5.2 12th 26.1 28.1 average 93%
Hay Airport AWS 24.3   31.0 23rd 11.4   5.0 12th 23.6
Hillston Airport 25.1 +0.8 30.2 23rd 12.1 +1.5 5.8 26th 45.6 27.0 high 169%
Lake Cargelligo Airport 25.2 0.0 30.8 23rd 12.9 +2.2 7.5 26th 36.8 30.5 high 121%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in New South Wales 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 Monday 3 May 2010. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

A note about deciles: Deciles are used to give an element (in this case rainfall or temperature) a ranking. Deciles are calculated by arranging the totals in ascending order (from lowest to highest) then splitting them into 10 equal groups (thus the groups are called deciles). The first group would be in decile range one, the second group in decile range two, etc up to the highest annual totals (highest 10 per cent) being in decile range 10.

1Averages: Averages are based on the period 1961 to 1990 which is a convention of the World Meteorological Organisation

Normals are long-term averages 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 20 years of record for temperature and less than 30 years of record for rainfall, as they cannot then be calculated reliably.

Further information

Media
(03) 9669 4057
Enquiries