NSW in April 2011: A cool, dry April for NSW

  • Below average rainfall in NSW and the MDB
  • Below average temperatures

Rainfall

NSW recorded a statewide average rainfall of 31.9 mm during April, 14.8 mm below the historical average of 46.7 mm. This is the first month with below average rainfall since June 2010, as the strong La Nina event which drove record falls in late 2010 and early 2011 waned in the Pacific Ocean. Rainfall was highest in the northeast of the state associated with persistent easterly windflow, while western and southern regions experienced a return to drier conditions following record-breaking falls in preceding months. In addition, the Murray-Darling Basin recorded just 24.4 mm during April, below the historical average of 38.1 mm.

Rainfall along the coast persisted for most of the month, although daily falls only exceeded 100 mm at Wyee on the 1st, with particularly widespread falls on the 16th. The only significant rain to fall in western parts was between the 10th and 11th as a cold front crossed the state, with daily falls on the order of 10 to 20 mm.

See a map of rainfall deciles.

Temperature

Maximum temperatures averaged 23.8 °C during April, 0.3 °C below the historical average of 24.1 °C. The majority of the state had slightly below average temperatures, with coolest conditions in the south east of the state, particularly along the Southern and Central Tablelands. The cool conditions were predominately due to the prevailing southerly to easterly winds driving cool air into the state during the month, with particularly cool conditions between the 10th and 17th including record cold at Bathurst on the 16th.

Minimum temperatures averaged 10.0 °C during April, 1.1 °C below the historical average of 11.1 °C and the equal 13th coldest on record. Temperatures were below average over most of the state, particularly in the west, with above average minimums only recorded on the north coast. Minimums were warmest on the offshore islands associated with persistent warm sea surface temperature anomalies in the Australian region.

The mean temperature in NSW was consequently 0.7 °C below average at 16.9 °C, the 16th coldest on record.

Some sites had their coldest April day (lowest maximum temperature) on record.

See a map of maximum temperature anomalies. See a map of minimum temperature anomalies.

Wind

Several strong wind days were recorded at Thredbo during the month, reaching 120 km/hr on the 9th and 13th and 117 km/hr on the 10th.

Further information

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Extremes in April 2011
Hottest day 32.5 °C at Mungindi Post Office on the 1st
32.5 °C at Nyngan Airport on the 1st
32.5 °C at Mungindi Post Office on the 3rd
Warmest days on average 28.5 °C at Mungindi Post Office
Coolest days on average 8.5 °C at Thredbo AWS
Coldest day 0.8 °C at Thredbo AWS on the 13th
Coldest night -5.1 °C at Perisher Valley AWS on the 23rd
Coolest nights on average -0.8 °C at Perisher Valley AWS
Warmest nights on average 18.3 °C at Lord Howe Island Aero
18.3 °C at Norfolk Island Aero
Warmest night 22.2 °C at Norfolk Island Aero on the 16th
Warmest on average overall 20.8 °C at Byron Bay (Cape Byron AWS)
20.8 °C at Lord Howe Island Aero
Coolest on average overall 4.4 °C at Thredbo AWS
Wettest overall 463.0 mm at Coffs Harbour (Perry Drive)
Wettest day 179.4 mm at Byron Bay (Jacaranda Drive) on the 30th
102.0 mm at Wyee (Wyee Farms Rd) on the 17th
Highest wind gust 120 km/h at Thredbo AWS on the 9th
120 km/h at Thredbo AWS on the 13th


Record lowest April daily maximum temperature
Lowest daily maximum
temperature
in April 2011 (°C)
Previous coolest
for April
Years of
record
Average for
April
Grafton Olympic Pool 17.8 on the 16th = 17.8 on the 22nd in 1985 45 26.2



Summary statistics for April 2011
Maximum temperatures
for April
(°C)
Minimum temperatures
for April
(°C)
Rainfall
for April
(millimetres)
Mean for
April
2011
Diff
from
average
Highest for
April
2011
Mean for
April
2011
Diff
from
average
Lowest for
April
2011
Total for
April
2011
Average
for
April
Rank of
April
2011
Fraction of
April
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 25.2   31.3 9th 11.2   6.9 12th 16.0
Tibooburra Airport 26.5   31.4 9th 12.9   8.3 11th 1.0
Tibooburra Post Office 26.5 -0.5 31.7 9th 12.9 -1.0 8.4 11th 7.8 14.6 average 53%
White Cliffs AWS 25.6   31.1 9th 12.0   7.2 12th 7.6
White Cliffs Post Office 25.9 -0.5 31.1 8th 11.0 -1.4 6.4 12th 9.4 15.4 average 61%
Wilcannia (Reid St) 25.4 -0.8 30.9 9th 10.8 -0.9 7.0 29th 12.6 17.2 average 73%
Wilcannia Aerodrome AWS 25.2   31.1 9th 10.0   6.8 24th 11.4
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 23.6 -0.3 29.8 9th 11.5 -0.3 7.2 11th 12.6 17.4 average 72%
Broken Hill Airport AWS 23.4 -0.9 29.0 9th 9.6 -1.7 7.0 1st 12.8 20.3 average 63%
Lake Victoria Storage 24.1 +0.6 30.0 9th 10.7 +0.2 6.0 25th 11.1 18.4 average 60%
Menindee Post Office 24.7 -0.9 31.8 9th 11.8 +0.9 8.4 25th 14.8 16.2 average 91%
Pooncarie Mail Agency 24.9   31.0 9th 11.2   8.0 25th 18.8 17.8 average 106%
Western (Upper Darling) (district 48)
Bourke Airport AWS 26.4   31.2 4th     5.1 12th 7.6
Brewarrina Hospital 26.9 -0.6 32.0 1st 11.8 -0.8 6.0 13th 11.2 29.5 average 38%
Cobar Airport AWS 24.7   29.7 1st 10.7   4.8 13th 12.4
Cobar MO 24.9 -0.3 30.3 1st 11.7 -1.2 5.7 11th 17.8 26.7 average 67%
Lightning Ridge Visitors Information Cen 28.1   32.0 4th 13.3   7.0 12th 13.5
Wanaaring Post Office 27.0   31.6 9th 12.2   6.1 12th 6.1 15.9 average 38%
Western (Southwest Plains) (district 49)
Balranald (RSL) 23.4 -0.6 29.8 9th 9.6 +0.1 5.2 12th 23.6 23.4 average 101%
Ivanhoe Aerodrome AWS 24.2   30.3 9th 9.7   5.9 25th 22.6
Ivanhoe Post Office 24.7 -1.1 30.6 9th 8.8 -1.5 3.5 26th 18.3 19.2 average 95%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 23.0 -1.6 29.5 9th 8.7 -1.2 4.4 13th 30.0 31.6 average 95%
Condobolin Airport AWS 23.0   29.3 9th 8.2   4.3 13th 31.8
Peak Hill Post Office 24.0 -1.0 30.0 1st 11.3 -1.0 5.9 13th 44.5 42.3 average 105%
West Wyalong Airport AWS 22.2   28.2 9th 8.0   4.3 23rd 18.4
Central Western Plains (North) (district 51)
Coonamble Airport AWS 27.2   31.8 1st 10.6   5.6 13th 3.4
Nyngan Airport 25.4 -0.2 32.5 1st 11.3 -0.5 6.0 13th 21.6 35.0 average 62%
Trangie Research Station AWS 24.7 +0.3 30.3 1st 10.1 -1.1 4.4 14th 49.6 40.2 high 123%
Northwest Plains (West) (district 52)
Mungindi Post Office 28.5 +0.9 32.5 3rd 12.8 0.0 6.9 24th 28.8 30.8 average 94%
Walgett Airport AWS 27.9   32.0 1st 10.5   3.9 13th 8.2
Northwest Plains (East) (district 53)
Moree Aero 26.8   30.8 1st 12.3   7.4 12th 63.6
Northwest Slopes (North) (district 54)
Barraba Post Office 24.9 -0.1 28.5 1st 7.0 -1.0 1.9 13th 47.0 39.6 average 119%
Narrabri Airport AWS 26.6   30.6 1st 11.9   6.0 13th 31.2
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 26.4   30.0 3rd 9.8   3.4 13th 33.6
Gunnedah Pool 26.0 -0.4 30.2 1st 12.2 +0.8 6.1 14th 30.6 37.6 average 81%
Gunnedah Resource Centre 25.5 +0.3 29.7 1st 12.4 -0.4 7.4 12th 26.2 39.3 average 67%
Quirindi Post Office 25.1 +0.2 29.4 1st 8.2 -0.7 3.8 23rd 39.0 42.0 average 93%
Tamworth Airport AWS 25.0   28.5 1st 9.1   4.4 13th 38.2
Woolbrook (Danglemah Road) 20.1 -1.2 23.5 2nd 4.4 -1.1 -2.5 13th 57.8 41.1 high 141%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 19.2   23.2 3rd 7.0   -0.9 13th 55.6
Armidale Airport AWS 18.3   22.1 3rd 8.3   3.1 13th 61.2
Glen Innes Ag Research Stn 19.7 -0.3 23.0 3rd 7.7 -0.3 0.0 13th 41.4 40.5 average 102%
Glen Innes Airport AWS 19.4   22.5 3rd 7.0   -1.9 13th 61.2
Glen Innes Post Office 20.0 -0.7 24.2 3rd 9.1 +1.2 1.1 13th 74.2 43.1 high 172%
Guyra Hospital 17.0 -1.0 20.9 2nd 7.0 +0.2 1.1 13th 53.2 52.3 average 102%
Inverell (Raglan St) 24.0   26.8 1st 6.9   0.5 13th 79.8
Inverell Research Centre 23.2 -0.3 26.8 1st 10.7 -0.3 4.6 13th 58.2 39.8 high 146%
Tenterfield (Federation Park) 20.0 -1.8 24.0 23rd 9.3 +0.8 0.5 13th 33.6 46.8 average 72%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 21.0 -1.2 24.7 2nd 12.6 -0.9 10.1 14th 141.1 102.8 high 137%
Upper North Coast (district 58)
Alstonville Tropical Fruit Research Stat 23.3 -0.6 27.0 21st 15.8 -0.1 13.1 13th 307.7 196.2 high 157%
Ballina Airport AWS 24.6   27.9 11th 16.0   11.8 15th 331.0
Byron Bay (Cape Byron AWS) 23.8   27.9 2nd 17.6   15.8 7th 172.2
Casino Airport 25.4 -1.5 29.0 2nd 15.0 +1.0 9.4 13th 127.0 95.1 high 134%
Casino Airport AWS 24.8   28.6 2nd 14.8   9.1 13th 129.8
Evans Head RAAF Bombing Range AWS 23.9   29.2 11th 16.3   13.3 13th 256.6
Grafton Airport AWS 25.0   29.6 21st 14.2   7.8 14th 175.4
Grafton Olympic Pool 25.5 -0.7 29.7 21st 15.1 +0.2 9.4 13th 118.0 87.7 high 135%
Grafton Research Stn 24.8   28.8 21st 15.1   10.5 13th 147.0 80.3 high 183%
Lismore (Richmond Hill) 24.6   28.0 21st 15.5   12.3 13th 250.4
Lismore Airport AWS 25.1   28.4 2nd 14.7   8.6 13th 207.6
Murwillumbah (Bray Park) 25.0 -1.2 28.2 21st 16.2 +0.7 13.6 11th 148.8 160.7 high 93%
Yamba Pilot Station 24.1 -0.2 27.8 2nd 16.8 +0.3 12.7 13th 441.8 162.1 v high 273%
Lower North Coast (district 59)
Coffs Harbour MO 23.3 -0.7 27.2 10th 15.5 +0.3 9.8 13th 447.2 177.5 v high 252%
Dorrigo (Old Coramba Rd) 18.6   24.0 2nd 10.5   4.6 13th 265.5
Kempsey (Wide Street) 24.8 -0.7 29.2 10th 14.3 +1.1 8.7 13th 145.2 115.7 high 125%
Kempsey Airport AWS 24.4   28.3 22nd 13.2   7.0 12th 122.6
South West Rocks (Smoky Cape Lighthouse) 24.4 +0.4 27.6 2nd 16.1 -0.5 13.5 29th 302.7 170.8 high 177%
Manning (district 60)
Forster - Tuncurry Marine Rescue 23.4   26.0 21st 13.5   9.0 13th 196.2 128.3 high 153%
Port Macquarie Airport AWS 23.6   28.0 10th 13.9   9.0 12th 284.8
Taree Airport AWS 23.5   28.9 10th 13.8   7.8 13th 221.2
Yarras (Mount Seaview) 23.4 -1.1 28.6 10th 13.0 +0.5 7.9 13th 143.2 141.9 average 101%
Hunter (district 61)
Cessnock (Nulkaba) 24.1 -0.5 30.0 10th 11.5 -0.2 5.0 13th 64.2 58.2 average 110%
Cessnock Airport AWS 23.4   29.1 10th 10.8   4.3 13th 60.4 49.2 average 123%
Cooranbong (Lake Macquarie AWS) 23.1   28.4 10th 11.2   5.1 13th 119.8
Gosford (Narara Research Station) AWS 22.4 -1.2 28.6 10th 11.7 -0.2 6.3 12th 224.4 137.7 high 163%
Jerrys Plains Post Office 24.6 -0.7 30.3 10th 11.4 +0.4 6.0 23rd 41.0 44.5 average 92%
Maitland Visitors Centre 23.6   29.8 10th 11.6   5.8 13th 140.0
Mangrove Mountain AWS 20.6   26.2 10th 11.3   7.7 15th 93.4
Merriwa (Roscommon) 23.4   29.6 2nd 8.8   2.6 13th 34.0 33.5 average 101%
Murrurundi Gap AWS 19.9   24.8 1st 10.4   5.8 12th 32.6
Murrurundi Post Office 22.3 -1.4 27.0 10th 8.7 +0.2 3.0 12th 45.2 52.9 average 85%
Nelson Bay (Nelson Head) 23.0 -0.6 27.0 10th 16.7 +1.9 13.0 13th 162.8 126.3 high 129%
Newcastle Nobbys Signal Station AWS 22.6 -0.2 28.1 10th 15.8 +0.5 12.5 13th 87.4 116.1 average 75%
Newcastle University 23.1   28.0 22nd 13.9   8.8 13th 125.3
Norah Head AWS 22.7   28.3 10th 15.5   12.3 12th 122.2
Paterson (Tocal AWS) 23.4 -0.8 29.4 10th 12.2 -0.2 6.7 13th 154.2 80.2 high 192%
Peats Ridge (Waratah Road) 20.8 -1.3 26.6 10th 11.9 -0.1 8.3 12th 133.5 125.7 average 106%
Scone Airport AWS 23.8   28.6 10th 10.1   4.3 13th 24.8
Singleton STP 23.8   30.5 10th 11.1   7.0 23rd 63.4
Williamtown RAAF 23.6 0.0 29.5 10th 12.8 -0.4 5.8 13th 179.4 105.7 high 170%
Central Tablelands (North) (district 62)
Gulgong Post Office 22.8 -0.6 28.4 2nd 9.3 -0.5 2.9 13th 39.7 44.4 average 89%
Mudgee Airport AWS 22.0   27.2 2nd 8.2   0.5 13th 21.0
Nullo Mountain AWS 15.0   21.0 2nd 8.0   3.7 11th 70.2
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 19.5 -0.6 24.0 1st 5.9 -0.8 0.2 23rd 23.6 41.9 average 56%
Bathurst Airport AWS 19.3   24.8 1st 6.0   0.0 23rd 18.6
Katoomba (Murri St) 15.8 -0.9 21.7 9th 8.5 -0.2 4.5 11th 137.2 121.8 high 113%
Lithgow (Cooerwull) 16.5   22.0 1st 7.1   0.4 23rd 41.2 58.0 average 71%
Mount Boyce AWS 15.1   20.8 9th 8.0   4.2 11th 63.0
Oberon (Springbank) 15.4 -1.7 19.9 1st 6.0 +0.7 0.7 15th 37.6 57.8 low 65%
Orange Agricultural Institute 17.1 -1.4 21.6 1st 6.8 -0.4 2.4 11th 42.0 52.9 average 79%
Orange Airport AWS 17.0   22.0 1st 5.1   0.4 15th 36.4
Orange Airport Comparison 17.6 -0.7 22.0 1st 5.8 -0.4 1.0 13th 8.6 52.0 low 17%
Springwood (Valley Heights) 20.6   25.2 9th 12.2   8.2 12th 60.8 87.7 average 69%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 23.9 0.0 27.8 1st 5.8 -1.3 1.0 12th 20.2 52.8 average 38%
Coonabarabran Airport AWS 22.8   27.4 1st 10.6   6.7 12th 24.4
Dunedoo Post Office 23.8 -0.4 29.0 2nd 10.4 +0.7 3.2 23rd 23.3 41.5 average 56%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 22.4   27.5 1st 7.2   2.5 28th 21.4
Cowra Airport Comparison 22.6 -1.0 27.6 1st 7.2 -1.1 2.9 23rd 21.6 42.8 average 50%
Dubbo Airport AWS 24.0   29.0 1st 9.6   3.5 13th 28.4
Forbes Airport AWS 23.4   29.1 1st 8.1   4.0 23rd 26.2
Parkes (Macarthur Street) 23.6 0.0 29.0 1st 9.0 -2.0 4.8 23rd 51.2 41.6 average 123%
Parkes Airport AWS 22.6   28.5 1st 7.6   2.5 23rd 54.8 32.1 high 171%
Wellington (Agrowplow) 23.9 -0.6 28.6 1st 9.0 -0.4 2.6 13th 37.2 45.6 average 82%
Metropolitan (East) (district 66)
Bankstown Airport AWS 22.3 -1.4 27.1 10th 12.3 -0.4 6.9 12th 100.0 83.2 high 120%
Canterbury Racecourse AWS 22.2   27.1 10th 12.0   6.8 12th 109.0
Holsworthy Control Range 22.4   27.3 9th 11.3   4.4 12th 75.8
Parramatta North (Masons Drive) 22.2 -1.6 27.6 10th 12.1 -0.7 8.9 12th 136.4 87.9 high 155%
Riverview Observatory 22.1 -0.7 27.0 9th 13.0 +0.1 9.6 12th 199.4 108.0 high 185%
Sydney (Observatory Hill) 22.7 +0.3 27.0 9th 14.7 0.0 11.5 12th 206.2 126.3 high 163%
Sydney Airport AMO 22.5 -0.4 27.7 10th 14.7 +0.6 10.9 12th 202.2 106.0 high 191%
Sydney Harbour (Wedding Cake West) 21.9   26.7 10th 15.9   12.7 12th
Sydney Olympic Park (Sydney Olympic Pk A 22.6   28.2 9th 13.9   10.3 12th 157.4
Terrey Hills AWS 21.0   26.6 10th 13.0   9.3 12th 147.4
Metropolitan (West) (district 67)
Badgerys Creek AWS 22.7   27.4 9th 10.6   4.6 12th 27.0
Horsley Park Equestrian Centre AWS 22.2   27.3 10th 12.2   6.8 12th 67.2
Liverpool (Michael Wenden Centre) 23.0   27.6 9th 11.2   5.4 12th 51.8
Penrith Lakes AWS 22.8   27.8 9th 12.7   7.9 12th 35.0
Prospect Reservoir 22.4 -1.3 27.9 10th 12.5 -0.5 9.0 12th 96.4 74.1 high 130%
Richmond RAAF 22.3   28.0 10th 11.4   6.4 12th 48.6
Illawarra (district 68)
Bellambi AWS 21.7   26.4 9th 15.2   12.2 12th 97.4
Bowral (Parry Drive) 17.1 -2.3 23.4 9th 9.0 +1.0 5.1 15th 35.4 76.8 average 46%
Camden Airport AWS 22.5 -1.3 27.2 9th 10.0 -1.0 4.2 12th 32.0 64.9 average 49%
Campbelltown (Mount Annan) 22.8   27.4 9th 10.3   4.1 12th 34.8
Jervis Bay (Point Perpendicular AWS) 20.7   25.8 9th 15.0   11.2 12th 71.8
Kiama (Bombo Headland) 21.3   25.3 20th 15.1   12.2 12th 78.6
Moss Vale AWS 17.0   22.8 9th 7.9   1.8 15th 32.0
Nowra RAN Air Station AWS 21.3   26.8 9th 11.7   7.6 12th 67.2
South Coast (district 69)
Batemans Bay (Catalina Country Club) 21.5   27.8 9th 10.5   5.0 13th 34.1 64.8 low 53%
Braidwood Racecourse AWS 18.0   23.3 9th 4.4   -1.1 18th 5.4
Green Cape AWS 20.4   24.8 19th 14.1   10.7 12th 45.8
Merimbula Airport AWS 21.4   24.6 19th 10.7   5.6 3rd 44.0
Montague Island Lighthouse 20.3 -0.2 23.0 9th 15.2 +0.1 12.6 12th 80.2 78.3 high 102%
Moruya Airport AWS 21.7   27.2 9th 10.7   4.1 12th 29.8
Moruya Heads Pilot Station 21.3 -0.3 26.0 9th 12.4 +0.1 7.8 12th 40.2 86.4 average 47%
Narooma Vmr 21.1 0.0 24.1 20th 13.3 +0.4 9.0 12th 56.6 78.8 average 72%
Nerriga Composite 18.0 -1.4 24.5 9th 5.7 -1.1 -0.9 12th 27.7 56.5 average 49%
Ulladulla AWS 20.6   24.1 9th 13.8   10.3 12th 160.2
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 17.9 -0.6 23.5 9th 4.7 -0.5 0.0 23rd 20.6 44.7 average 46%
Bombala AWS 16.0   21.4 9th 4.1   -0.5 23rd 14.8
Canberra Airport 19.6   24.8 9th 5.4   -1.1 23rd 8.8
Cooma Airport AWS 16.3   22.4 9th 2.6   -2.3 23rd 6.4 37.6 v low 17%
Cooma Visitors Centre 17.9 -1.6 23.1 9th 2.3 -1.7 -1.5 12th 6.8 37.9 v low 18%
Goulburn Airport AWS 18.2   23.7 9th 5.2   -1.1 15th 17.4
Goulburn TAFE 18.1 -2.0 23.8 9th 7.2 -0.5 1.6 24th 19.2 45.3 average 42%
Mount Ginini AWS 10.1   15.3 9th 2.7   -1.1 11th 28.8
Taralga Post Office 17.2 -1.4 23.6 9th 5.7 -0.5 0.1 18th 30.5 58.9 average 52%
Tuggeranong (Isabella Plains) AWS 19.4   24.5 9th 6.5   -0.2 23rd 11.4
Southern Tablelands (Snowy Mountains) (district 71)
Perisher Valley AWS 10.9   16.7 8th -0.8   -5.1 23rd 78.2
Thredbo AWS 8.5 -0.9 13.7 8th 0.2 -1.3 -2.4 11th 79.0 98.5 average 80%
Thredbo Village 13.1 -0.8 17.5 8th 0.4 -1.0 -3.5 8th 70.0 110.2 low 64%
Southwest Slopes (South) (district 72)
Albury Airport AWS 21.0   27.1 9th 7.8   4.0 23rd 26.8
Cabramurra SMHEA AWS 11.5   16.1 4th 4.3   1.1 12th 79.2
Hume Reservoir     22.0 30th 9.2 -0.8 5.2 23rd 29.4 51.5 average 57%
Khancoban AWS 20.0   24.1 9th 5.8   2.6 17th 58.6
Tumbarumba Post Office 18.6 -1.4 23.0 9th 4.4 -0.5 0.5 15th 62.4 66.1 average 94%
Wagga Wagga AMO 21.5 -1.0 27.0 9th 7.6 -1.5 2.4 23rd 21.2 41.0 average 52%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 20.6 -0.4 24.9 9th 9.7 +0.2 5.6 23rd 36.0 65.5 average 55%
Cootamundra Airport 20.8   26.0 9th 6.9   0.6 24th 21.6
Grenfell (Manganese Rd) 21.5 -1.1 25.4 9th 7.3 -2.0 3.1 24th 24.8 47.2 average 53%
Gundagai (William St) 21.2   27.0 9th 7.6   2.8 24th 27.2
Quandialla Post Office 22.6 -1.5 28.0 9th 9.3 -0.3 4.4 23rd 18.6 41.7 average 45%
Temora Airport 21.8   27.0 9th 7.7   2.2 23rd 16.8
Wyalong Post Office 22.4 -1.2 28.0 9th 9.5 -0.5 6.1 11th 19.4 35.6 average 54%
Young Airport 20.5   25.7 9th 6.6   0.8 23rd 22.2
Riverina (East) (district 74)
Corowa Airport 21.5 -1.0 28.5 9th 7.3 -1.3 3.2 23rd 25.4 36.5 average 70%
Deniliquin Airport AWS 22.5   29.5 9th 8.1   3.5 23rd 26.8
Narrandera Airport 22.9   29.5 9th 8.3   3.1 23rd 17.4 35.0 average 50%
Narrandera Golf Club 22.6 -0.9 28.3 9th 8.9 -1.1 3.9 23rd 61.0 39.9 high 153%
Tocumwal Airport 21.8 -1.2 28.8 9th 8.8 -0.9 5.2 23rd 38.5 32.1 average 120%
Yanco Agricultural Institute 22.7   28.9 9th 9.8   5.1 3rd 20.8 30.0 average 69%
Riverina (West) (district 75)
Griffith Airport AWS 23.1 -0.9 30.4 9th 9.4 -0.8 4.5 23rd 25.0 27.7 average 90%
Hay (Miller Street) 23.4 -0.7 29.0 9th 8.4 -1.5 4.1 25th 21.2 28.1 average 75%
Hay Airport AWS 23.7   30.4 9th 7.9   2.3 25th 15.8
Hillston Airport 23.4 -0.9 30.0 9th 9.0 -1.6 4.0 25th 37.6 27.1 high 139%
Lake Cargelligo Airport 22.8 -2.4 30.1 9th 9.8 -0.9 5.9 13th 30.4 30.5 average 100%
Offshore Islands (district 200)
Lord Howe Island Aero 23.4 +0.2 25.8 12th 18.3 +0.3 14.3 23rd 121.8 133.1 average 92%
Norfolk Island Aero 22.9 +0.2 25.1 13th 18.3 +0.6 15.1 29th 152.8 124.7 high 123%

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 2 May 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 20 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

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