NSW in April 2012: A dry month west of the divide

  • First dry month for NSW since October 2011.
  • Above average maximum temperatures, first time since November 2011.
  • Below average minimum temperatures.

Rainfall

NSW recorded a statewide average rainfall of 23.9 mm during April, well below the historical average of 46.7 mm and the driest April since 2006. This is the first month with below average rainfall in NSW since October 2011, following the breakdown of the 2011-12 La Niña event during March, and is the largest negative anomaly for any month since August 2009. The Murray-Darling Basin also recorded just 14.2 mm during April (average 38.1 mm), the driest April since 2008 and the strongest negative anomaly for any month since January 2009.

Most of NSW west of the divide recorded below average rainfall during April, with large parts of the northwest recording less than 1 mm during the month. Several stations including Broken Hill Airport and Cobar recorded no rainfall at all during the month, equaling their previous rainfall record, with large areas in the driest 10% of years. In contrast, the eastern seaboard and parts of the northeastern border experienced generally above average rainfall during the month, including the wettest April since 1990 at Bankstown and Glenorie in Sydney and since 1989 at Tweed Heads.

Most of the rain fell along the east coast between the 17th and 20th, as a coastal low pressure trough produced widespread heavy rain along the coast. Falls were highest in the metropolitan region and central coast, reaching 112 mm at Wyong on the 18th and 104 mm at Gosford on the 19th. Large areas reported multi-day totals above 150 mm, including 196.4 mm over 48 hours at Gosford, with widespread flash flooding including 16 flood rescues. The far northeast of the state also recorded heavy rainfall associated with a coastal low at the end of the month, with falls as high as 170.2 mm at Tweed Heads on the 29th.

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

Temperature

The average maximum temperature in NSW during April was 24.4 °C, 0.3 °C above the historical average and the first warm month since November 2011. Most of the state experienced average to above average temperatures, particularly in the west, associated with generally dry, clear conditions during the month. Temperatures were warmest at the start of the month, with most of NSW more than 4 °C above average between the 1st and the 6th, particularly in the northwest, breaking daily records at some locations.

The average minimum temperature in NSW during April was 10.5 °C, 0.6 °C below the historical average. Nights were generally above average in eastern NSW and below average west of the divide, consistent with the pattern of rainfall anomalies during the month. Nights were also warm at the start of the month, including the warmest night on record at Tidbinbilla on the 6th, while a cold snap on the 10th and 11th was the earliest for April since 1994 at Sydney Observatory Hill. The mean temperature during April was consequently 17.5 °C, 0.1 °C below the historical average.

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

Further information

Media
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Enquiries

Extremes in April 2012
Hottest day 38.2 °C at Tibooburra Post Office on the 3rd
Warmest days on average 28.4 °C at Mungindi Post Office
Coolest days on average 9.2 °C at Thredbo AWS
Coldest day -0.2 °C at Thredbo AWS on the 24th
Coldest night -8.0 °C at Charlotte Pass (Kosciusko Chalet) on the 11th
Coolest nights on average 0.0 °C at Charlotte Pass (Kosciusko Chalet)
Warmest nights on average 18.8 °C at Lord Howe Island Aero
Warmest night 23.2 °C at Tibooburra Post Office on the 3rd
Warmest on average overall 20.9 °C at Lightning Ridge Visitors Information Centre
20.9 °C at Lord Howe Island Aero
Coolest on average overall 5.3 °C at Charlotte Pass (Kosciusko Chalet)
Wettest overall 390.6 mm at Tweed Heads Golf Club
Wettest day 170.2 mm at Tweed Heads Golf Club on the 29th
Highest wind gust 115 km/h at Thredbo AWS on the 6th

Record highest April daily rainfall
Highest daily rainfall
in April 2012 (mm)
Previous wettest
for April
Years of
record
Wattamolla (Griffiths) 74.0 on the 19th 73.0 on the 4th in 2004 20



Record lowest total April rainfall
Total rainfall
for April 2012 (mm)
Previous driest
for April
Years of
record
Average for
April
Nyngan Airport 0.0 = 0.0 in 2008 131 34.8
Wanaaring Post Office 0.0 = 0.0 in 2008 126 15.8
Broken Hill Airport AWS 0.0 = 0.0 in 2001 52 19.9
Cobar MO 0.0 = 0.0 in 1977 50 26.2



Record highest April temperature
Highest temperature
in April 2012 (°C)
Previous warmest
for April
Years of
record
Average for
April
Oberon (Springbank) 25.0 on the 4th = 25.0 on the 4th in 1976 29 17.0
Charlotte Pass (Kosciusko Chalet) 19.8 on the 7th = 19.8 on the 2nd in 2002 25 10.5
Tamworth Airport AWS 32.2 on the 4th 32.0 on the 11th in 2005 21 25.3
Wanaaring Post Office 37.4 on the 3rd 37.0 on the 16th in 2004 21 27.9



Record highest April daily minimum temperature
Highest daily minimum
temperature
in April 2012 (°C)
Previous warmest
for April
Years of
record
Average for
April
Tidbinbilla Nature Reserve 15.0 on the 6th = 15.0 on the 8th in 2010 27 6.5



Summary statistics for April 2012
Maximum temperatures
for April
(°C)
Minimum temperatures
for April
(°C)
Rainfall
for April
(millimetres)
Mean for
April
2012
Diff
from
average
Highest for
April
2012
Mean for
April
2012
Diff
from
average
Lowest for
April
2012
Total for
April
2012
Average
for
April
Rank of
April
2012
Fraction of
April
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 26.2   35.5 3rd 11.4   5.2 27th 0
Tibooburra Airport 27.5   37.7 3rd 13.8   6.3 26th 0.4
Tibooburra Post Office 27.5 +0.5 38.2 3rd 13.8 -0.1 6.7 26th 1.2 14.5 average 8%
White Cliffs AWS 27.1   37.0 3rd 12.8   4.7 26th 0
Wilcannia (Reid St) 26.3 +0.1 34.4 3rd 11.4 -0.3 4.9 26th 0.2 17.1 low 1%
Wilcannia Aerodrome AWS 26.3   34.6 3rd 10.6   4.7 26th 0.4
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 25.2 +1.3 33.4 2nd 12.7 +0.9 6.3 11th 1.6 17.2 low 9%
Broken Hill Airport AWS 24.8 +0.5 32.7 2nd 10.7 -0.5 3.9 11th 0 19.9 lowest 0%
Lake Victoria Storage 25.2 +1.7 34.2 6th 10.3 -0.2 4.9 12th 4.0 18.2 low 22%
Menindee Post Office 25.9 +0.3 33.1 2nd 12.3 +1.4 7.3 28th 1.4 16.1 low 9%
Pooncarie Mail Agency 26.0   32.6 5th 11.4   6.8 30th 3.0 17.7 low 17%
Western (Upper Darling) (district 48)
Bourke Airport AWS 27.5   35.9 6th 11.8   3.1 25th 0.4
Brewarrina Hospital 27.6 +0.1 35.8 4th 12.2 -0.4 4.4 26th 4.8 29.3 average 16%
Cobar Airport AWS 26.1   36.2 3rd 10.0   2.5 11th 0.6
Cobar MO 25.8 +0.6 35.7 3rd 12.1 -0.7 4.4 26th 0 26.2 lowest 0%
Collarenebri (Albert St) 28.0 +0.4 34.9 4th 12.9 +0.4 4.4 26th 22.6 35.0 average 65%
Lightning Ridge Visitors Information Cen 28.1   36.0 4th 13.6   6.0 26th 21.2
Wanaaring Post Office 28.0 +0.1 37.4 3rd 12.0 -0.8 4.9 26th 0 15.8 lowest 0%
Western (Southwest Plains) (district 49)
Balranald (RSL) 24.5 +0.5 32.0 6th 10.5 +1.0 4.1 10th 11.8 23.3 average 51%
Ivanhoe Aerodrome AWS 24.9   32.7 3rd 10.5   4.9 11th 1.4
Ivanhoe Post Office 25.4 -0.3 33.1 3rd 9.4 -0.9 3.5 11th 0.5 19.1 low 3%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 24.8 +0.2 33.1 3rd 9.1 -0.8 2.3 11th 3.8 31.1 low 12%
Condobolin Airport AWS 25.1   33.3 3rd 8.5   1.7 11th 3.6
West Wyalong Airport AWS 23.9   32.8 3rd 8.4   2.1 11th 5.0
Central Western Plains (North) (district 51)
Coonamble Airport AWS 26.6   32.9 4th 11.2   3.1 25th 6.8
Nyngan Airport 26.8 +1.2 34.5 5th     5.7 26th 0 34.8 lowest 0%
Trangie Research Station AWS 25.9 +1.5 33.2 3rd 10.2 -1.0 2.8 25th 3.2 39.7 low 8%
Northwest Plains (West) (district 52)
Mungindi Post Office 28.4 +0.8 35.9 4th 12.9 +0.1 4.3 26th 48.6 31.0 high 157%
Walgett Airport AWS 27.0   34.8 4th 10.7   3.6 26th 10.2
Northwest Plains (East) (district 53)
Moree Aero 26.8   32.8 4th 13.0   3.5 26th 28.6
Northwest Slopes (North) (district 54)
Barraba Post Office 24.8 -0.2 31.5 4th     -0.4 11th 34.8 39.6 average 88%
Narrabri Airport AWS 26.3   33.1 4th 12.1   4.1 26th 37.8
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 25.8   32.9 4th 10.4   2.0 26th 19.8
Gunnedah Resource Centre 25.0 -0.2 31.9 8th 13.2 +0.4 5.9 25th 22.2 39.1 average 57%
Quirindi Post Office 25.2 +0.3 32.0 4th 10.1 +1.2 2.2 26th 27.0 41.9 average 64%
Tamworth Airport AWS 25.3 0.0 32.2 4th 10.0 +0.1 2.3 26th 29.0 26.6 average 109%
Woolbrook (Danglemah Road) 20.7 -0.5 27.0 4th 5.9 +0.4 -2.5 27th 66.4 41.6 high 160%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 20.0   26.3 8th 7.1   -0.2 10th 48.8
Armidale Airport AWS 19.4   25.8 8th 8.1   0.1 26th 56.8
Glen Innes Ag Research Stn 20.7 +0.7 26.0 7th 8.4 +0.4 0.5 26th 49.2 40.6 high 121%
Glen Innes Airport AWS 20.8   26.1 3rd 7.0   -2.1 10th 52.6
Glen Innes Post Office 21.1 +0.4 27.2 3rd 9.4 +1.5 1.2 26th 45.6 43.1 average 106%
Guyra Hospital 17.9 0.0 23.7 8th 7.3 +0.5 -0.9 26th 48.4 52.1 average 93%
Inverell (Raglan St) 24.6   31.5 4th 8.3   0.0 26th 58.2
Inverell Research Centre 24.1 +0.6 29.8 4th 11.3 +0.3 1.2 26th 38.0 39.9 average 95%
Tenterfield (Federation Park) 21.1 -0.7 26.3 3rd 8.6 +0.1 0.5 11th 52.0 46.9 average 111%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 21.7 -0.4 27.2 9th 13.8 +0.3 7.4 26th 97.4 102.6 average 95%
Upper North Coast (district 58)
Ballina Airport AWS 24.2   28.2 9th 16.3   9.9 26th 319.4
Byron Bay (Cape Byron AWS) 23.2   27.2 7th 17.3   12.0 11th 284.8
Casino Airport 25.4 -1.5 31.5 9th 15.6 +1.6 8.8 26th 115.8 95.3 high 122%
Casino Airport AWS 25.1   31.2 9th 15.6   9.0 26th 125.6
Evans Head RAAF Bombing Range AWS 24.6   31.4 9th 16.9   13.1 12th 137.0
Grafton Airport AWS 25.1   29.8 9th 14.2   6.5 26th 118.4
Grafton Olympic Pool 25.6 -0.6 30.4 9th 15.5 +0.6 9.4 26th 148.6 89.1 high 167%
Grafton Research Stn 25.1   29.6 9th 15.1   9.5 26th 109.0 80.8 high 135%
Lismore (Richmond Hill) 24.6   30.1 9th 15.7   10.2 26th 144.9
Lismore Airport AWS 24.9   30.8 9th 15.2   7.8 26th 132.6
Murwillumbah (Bray Park) 25.3 -0.8 30.1 9th 16.1 +0.6 7.6 26th 224.5 162.3 high 138%
Yamba Pilot Station 24.2 -0.1 29.8 9th 17.0 +0.5 11.7 26th 269.8 163.2 high 165%
Lower North Coast (district 59)
Coffs Harbour MO 23.9 -0.1 28.4 23rd 15.9 +0.7 8.3 26th 258.0 179.1 high 144%
Dorrigo (Old Coramba Rd) 19.8   25.0 23rd 12.1   6.4 25th 113.4
Kempsey (Wide Street) 24.9 -0.6 29.5 7th 14.9 +1.7 8.9 26th 160.2 116.0 high 138%
Kempsey Airport AWS 24.7   29.0 8th 13.8   7.5 25th 93.6
South West Rocks (Smoky Cape Lighthouse) 24.2 +0.2 28.1 8th 16.8 +0.2 13.0 11th 262.4 172.0 high 153%
Manning (district 60)
Forster - Tuncurry Marine Rescue 23.5   27.0 7th 16.0   11.0 25th 188.9 128.9 high 147%
Port Macquarie Airport AWS 23.9   27.1 8th 14.7   8.9 26th 200.0
Taree Airport AWS 23.8   29.1 7th 14.3   8.9 25th 125.2
Yarras (Mount Seaview) 23.8 -0.6 29.6 7th 14.1 +1.6 8.4 10th 167.2 142.3 average 117%
Hunter (district 61)
Cessnock (Nulkaba) 25.1 +0.5 30.5 7th 13.4 +1.7 7.9 25th 57.0 58.2 average 98%
Cessnock Airport AWS 23.8 -0.3 29.8 7th 11.9 +1.6 5.9 25th 45.2 49.0 average 92%
Cooranbong (Lake Macquarie AWS) 23.8   29.9 7th 12.3   5.8 25th 19.4
Gosford (Narara Research Station) AWS 23.3 -0.3 28.9 7th 12.7 +0.8 6.3 25th 227.2 138.6 high 164%
Jerrys Plains Post Office 25.2 -0.1 32.5 7th 12.4 +1.4 6.5 25th 24.3 44.3 average 55%
Maitland Visitors Centre 23.9   30.0 7th 12.7   6.5 29th 78.6
Mangrove Mountain AWS 22.2   28.3 7th 12.4   7.3 25th 151.8
Merriwa (Roscommon) 23.5   29.5 7th 9.4   2.8 11th 22.6 33.3 average 68%
Murrurundi Gap AWS 20.2   26.0 8th 11.3   3.6 25th 25.8
Murrurundi Post Office 22.6 -1.1 28.3 8th 8.9 +0.4 2.0 25th 30.4 52.8 average 58%
Nelson Bay (Nelson Head) 22.8 -0.8 28.5 7th 16.6 +1.7 11.3 11th 293.3 127.3 v high 230%
Newcastle Nobbys Signal Station AWS 23.0 +0.2 30.5 7th 16.4 +1.1 11.5 25th 106.8 116.0 average 92%
Newcastle University 23.9   30.0 7th 14.3   10.2 25th 170.2
Norah Head AWS 23.0   28.6 7th 16.4   11.3 25th 151.6
Peats Ridge (Waratah Road) 21.8 -0.3 27.4 7th 12.8 +0.8 7.3 25th 133.0 127.0 average 105%
Scone Airport AWS 24.4 0.0 30.7 8th 10.5 +0.6 4.5 27th 24.4
Singleton STP 24.2   30.9 7th 11.3   2.8 25th 30.1
Williamtown RAAF 23.5 -0.1 30.5 7th 13.6 +0.4 8.5 25th 155.4 106.5 high 146%
Central Tablelands (North) (district 62)
Gulgong Post Office 23.9 +0.5 30.4 4th 9.9 +0.1 3.2 11th 10.8 44.2 low 24%
Mudgee Airport AWS 23.0 +0.2 29.1 4th 8.4 +0.8 0.3 11th 12.2
Nullo Mountain AWS 16.6 -0.1 22.6 7th 8.5 +0.1 1.2 10th 71.2
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 21.2 +1.1 28.2 4th 6.5 -0.2 -0.3 29th 12.2 41.6 low 29%
Bathurst Airport AWS 20.9 +0.3 28.1 4th 6.4 +0.2 -0.1 11th 11.6
Katoomba (Murri St) 18.1 +1.4 25.1 3rd 9.3 +0.6 1.4 11th 135.2 121.9 average 111%
Lithgow (Cooerwull) 18.7   24.9 4th 7.4   0.0 11th 44.4 57.9 average 77%
Mount Boyce AWS 17.6 +0.6 24.3 3rd 9.0 +0.4 1.4 10th 105.0
Oberon (Springbank) 17.9 +0.9 25.0 4th 5.8 +0.5 -0.7 10th 21.3 57.4 low 37%
Orange Agricultural Institute 18.7 +0.3 25.6 3rd 7.4 +0.2 0.4 11th 14.3 52.1 low 27%
Orange Airport AWS 18.2   25.4 4th 5.6   -0.4 10th 13.4
Springwood (Valley Heights) 22.4   28.1 7th 12.8   7.3 25th 138.8 88.1 high 158%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 23.8 -0.1 30.6 4th 7.5 +0.4 1.3 11th 24.4 52.6 average 46%
Coonabarabran Airport AWS 22.4   29.4 4th 11.9   4.3 11th 17.2
Dunedoo Post Office 24.7 +0.5 32.2 4th 10.3 +0.6 2.8 11th 10.1 41.2 low 25%
Central Western Slopes (South) (district 65)
Dubbo Airport AWS 25.4   32.2 4th 10.2   3.5 10th 1.6
Forbes Airport AWS 24.6   32.1 5th 8.7   3.5 11th 3.0
Parkes (Macarthur Street) 24.6 +1.0 32.0 4th 9.8 -1.1 3.4 10th 17.8 41.4 average 43%
Parkes Airport AWS 24.1   31.7 3rd 8.6   1.1 10th 19.6 31.6 average 62%
Wellington (Agrowplow) 24.9 +0.4 32.1 4th 9.3 -0.1 2.0 11th 6.9 45.3 low 15%
Metropolitan (East) (district 66)
Bankstown Airport AWS 23.9 +0.3 29.2 3rd 13.1 +0.4 7.8 25th 163.0 85.0 high 192%
Canterbury Racecourse AWS 23.5   28.7 3rd 13.0   7.9 30th 149.2
Holsworthy Control Range 23.4   28.5 3rd 12.2   6.8 25th 134.2
Parramatta North (Masons Drive) 23.5 -0.3 29.0 3rd 13.1 +0.3 8.0 30th 176.4 89.8 high 196%
Riverview Observatory 23.3 +0.6 27.3 9th 13.4 +0.5 8.2 11th 184.4 108.9 high 169%
Sydney (Observatory Hill) 23.6 +1.2 28.3 7th 15.5 +0.8 10.1 10th 148.2 126.4 average 117%
Sydney Airport AMO 23.6 +0.7 28.6 3rd 15.5 +1.3 9.8 10th 112.6 106.2 average 106%
Sydney Harbour (Wedding Cake West) 22.0   26.0 7th 16.3   10.7 10th
Sydney Olympic Park AWS (Archery Centre) 23.9   28.9 3rd 14.1   9.4 30th 188.6
Terrey Hills AWS 22.1   26.8 3rd 14.0   8.4 10th 210.8
Metropolitan (West) (district 67)
Badgerys Creek AWS 23.6   28.7 3rd 12.0   5.8 25th 129.4
Horsley Park Equestrian Centre AWS 23.4   28.7 3rd 12.9   8.1 9th 169.0
Penrith Lakes AWS 24.2   29.5 3rd 13.6   9.5 13th 93.6
Prospect Reservoir 23.7 +0.1 29.3 3rd 13.2 +0.2 7.0 25th 157.5 74.8 high 211%
Richmond RAAF 24.1   29.6 7th 12.7   7.7 29th 131.2
Illawarra (district 68)
Albion Park (Wollongong Airport) 23.2   27.7 3rd 12.1   6.8 13th 84.4
Bellambi AWS 22.2   26.6 3rd 15.7   9.3 10th 145.8
Bowral (Parry Drive) 18.9 -0.4 25.7 4th 9.3 +1.2 1.8 10th 75.2 76.8 average 98%
Camden Airport AWS 23.6 -0.2 29.7 3rd 11.3 +0.3 5.8 30th 142.6 66.9 high 213%
Campbelltown (Mount Annan) 23.6   28.4 3rd 11.6   6.4 25th 144.8
Jervis Bay (Point Perpendicular AWS) 21.0   25.2 5th 15.3   10.1 10th 45.0
Kiama (Bombo Headland) 21.8   25.3 3rd 15.3   10.0 10th 109.6
Moss Vale AWS 18.5   25.1 3rd 8.5   -0.1 30th 74.8
Nowra RAN Air Station AWS 22.8   27.6 3rd 12.4   7.0 10th 89.0
South Coast (district 69)
Batemans Bay (Catalina Country Club) 21.6 -0.7 26.1 6th 11.2 +0.7 4.0 11th 105.8 66.7 high 159%
Bega AWS 22.1 -0.1 28.7 3rd 10.2 +0.9 3.3 30th 104.6
Braidwood Racecourse AWS 19.2 -0.2 26.4 3rd 6.0 +0.4 -0.7 12th 51.4
Green Cape AWS 20.5   24.7 4th 14.5   9.0 10th 172.0
Merimbula Airport AWS 21.4   25.6 15th 11.4   4.9 30th 164.6
Montague Island Lighthouse 20.1 -0.4 23.2 15th 15.4 +0.3 10.0 10th 146.8 79.6 high 184%
Moruya Airport AWS 21.5   24.9 15th 11.0   4.0 11th 65.0
Moruya Heads Pilot Station 20.9 -0.7 23.1 6th 12.4 +0.1 6.7 11th 75.4 86.6 average 87%
Narooma (Marine Rescue)     23.7 15th 12.2 -0.8 8.3 30th 125.9 79.4 high 159%
Ulladulla AWS 21.3 -0.1 23.9 6th 14.4 +0.6 8.5 10th 89.4
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 19.1 +0.6 27.5 3rd 5.9 +0.7 -1.0 30th 73.8 45.0 high 164%
Bombala AWS 17.8 0.0 26.8 3rd 5.5 +0.2 -1.5 28th 55.4
Canberra Airport 20.2   26.4 4th 6.2   -0.4 30th 17.6
Cooma Airport AWS 17.7 -0.4 25.8 3rd 4.2 +0.7 -3.6 12th 52.2 38.2 high 137%
Cooma Visitors Centre 19.4 -0.1 27.0 3rd 4.8 +0.9 -2.5 12th 56.8 38.4 high 148%
Goulburn Airport AWS 19.6 -0.2 25.3 3rd 6.2 +0.7 -2.6 11th 41.2
Goulburn TAFE 19.7 -0.3 25.5 3rd 7.9 +0.2 -0.4 11th 35.8 45.1 average 79%
Mount Ginini AWS 11.8   19.5 3rd 4.4   -4.5 10th 96.8
Taralga Post Office 19.3 +0.7 26.0 3rd 6.0 -0.2 -2.2 11th 53.9 58.9 average 92%
Tuggeranong (Isabella Plains) AWS 20.2   26.7 4th 6.5   0.0 12th 45.6
Southern Tablelands (Snowy Mountains) (district 71)
Charlotte Pass (Kosciusko Chalet) 11.5 +1.0 19.8 7th 0.0 +0.5 -8.0 11th 121.9 152.7 average 80%
Perisher Valley AWS 12.1   21.1 5th 2.2   -5.0 11th 109.4
Thredbo AWS 9.2 -0.1 17.5 5th 2.3 +0.9 -5.9 11th 80.4 97.9 average 82%
Thredbo Village 14.1 +0.3 22.5 5th 3.1 +1.7 -3.5 30th 86.4 109.6 average 79%
Southwest Slopes (South) (district 72)
Albury Airport AWS 22.4   29.9 3rd 9.0   1.0 10th 46.4
Cabramurra SMHEA AWS 12.9   20.4 4th 6.2   -3.5 10th 60.2
Hume Reservoir 22.3 +0.7 29.0 3rd 10.1 +0.1 2.2 10th 58.0 51.5 average 113%
Khancoban AWS 20.8   28.0 5th 7.7   0.3 11th 27.4
Tumbarumba Post Office 20.2 +0.3 27.5 5th 5.7 +0.8 -1.5 10th 21.2 65.7 low 32%
Wagga Wagga AMO 22.6 +0.1 30.5 3rd 8.4 -0.7 0.9 11th 8.2 40.6 v low 20%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 21.2 +0.2 28.0 3rd 9.8 +0.3 1.0 12th 25.0 65.1 low 38%
Cootamundra Airport 21.7   28.5 5th 6.6   -0.5 10th 14.6
Grenfell (Manganese Rd) 22.4 -0.2 29.5 3rd 8.1 -1.2 1.9 10th 13.8 46.9 low 29%
Gundagai (William St) 22.0   29.0 4th 8.1   0.6 11th 16.6
Quandialla Post Office 23.9 -0.2 31.5 3rd 9.5 -0.1 3.2 10th 9.8 41.4 low 24%
Temora Airport 23.1   30.2 5th 7.3   0.0 11th 5.0
Wyalong Post Office 24.1 +0.5 32.7 3rd 10.1 +0.1 4.2 11th 7.8 35.3 low 22%
Young Airport 21.9 -0.8 29.5 5th 6.0 -0.4 -0.3 10th 15.2
Riverina (East) (district 74)
Corowa Airport 23.0 +0.5 30.4 3rd 8.9 +0.3 2.2 11th 44.4 36.5 average 122%
Deniliquin Airport AWS 23.5   30.8 6th 8.0   1.7 30th 8.4
Narrandera Airport 23.7   32.0 6th 8.8   1.5 11th 10.2 34.4 low 30%
Narrandera Golf Club 23.4 0.0 31.2 6th 8.9 -1.1 1.5 11th 14.5 38.4 low 38%
Tocumwal Airport 22.8 -0.2 30.0 6th 9.6 -0.1 3.7 11th 18.9 32.0 average 59%
Yanco Agricultural Institute 23.7   31.5 3rd 10.6   3.4 10th 11.0 29.7 average 37%
Riverina (West) (district 75)
Griffith Airport AWS 23.3 -0.7 31.7 6th 9.3 -0.9 3.5 30th 34.6 27.9 high 124%
Hay (Miller Street) 23.4 -0.7 30.7 6th 8.7 -1.2 2.6 30th 8.4 27.9 average 30%
Hay Airport AWS 24.4   31.1 6th 7.9   1.1 30th 11.0
Hillston Airport 24.2 -0.1 32.8 15th 9.3 -1.3 3.0 11th 20.2 27.0 average 75%
Lake Cargelligo Airport 24.3 -0.9 33.5 3rd 10.7 0.0 4.9 10th 9.6 30.4 low 32%
Offshore Islands (district 200)
Lord Howe Island Aero 23.0 -0.2 24.9 9th 18.8 +0.7 15.3 30th 180.8 135.1 high 134%
Norfolk Island Aero 22.7 0.0 23.7 10th 18.5 +0.8 15.5 13th 104.8 124.5 average 84%

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 12 pm on Tuesday 1 May 2012. 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.

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