New South Wales in September 2010: La Niña brings a wet and cold start to Spring

  • Wettest September since 1998 for the MDB, since 2005 for NSW
  • Lowest September average maximum temperature since 1998
  • 6th consecutive September with above average minimum temperatures for NSW

Rainfall

Above average rainfall was recorded for much of the state during September, with very much above average rainfall recorded in areas of northern and central NSW. Average rainfall was recorded along much of the coast and Great Dividing Range, with the exception of small regions along the central and southern coast. A small area of very much below average rainfall was recorded on the Victorian border. The statewide average rainfall for September was 50.1mm which is above the historical average of 34.7mm. This is the wettest September for NSW since 2005 (58.0mm).

It was Australia's wettest September on record (see Special Climate Statement 22) associated with a moderate to strong La Niña event, now well established in the Pacific Ocean. The rainfall distribution across NSW during the month (wet in the west, drier in the east) is typical of that experienced during a La Niña event. Long-range models surveyed by the Bureau of Meteorology suggest the central Pacific will continue to exceed La Niña thresholds through spring, with the majority indicating the La Niña event will continue into at least early 2011. For routine updates and comprehensive discussion on any developments regarding El Niño and La Niña, please see the ENSO Wrap-Up.

Much of the rainfall experienced by the state resulted from four main rainfall events. On the 4th/5th September a complex low pressure system developed over South Australia and moved over western Victoria. This brought heavy rainfall over much of NSW, with the heaviest rainfall experienced over the southwestern slopes of the southern ranges and adjacent inland. Mid month low pressure troughs and associated cloud bands generated rain for most of the state, and from the 20th to the 26th a lingering low pressure trough brought isolated showers to the northeastern corner of the state.

The Murray Darling Basin recorded a basin-wide average of 60.6mm which is above the historical average of 34.0mm. This is the wettest September in 12 years for the MDB and the 10th highest September MDB monthly rainfall on record.

Some sites had their highest total September rainfall on record.

See a map of rainfall deciles.

Temperature

Areas west of the Divide experienced below average to very much below average maximum temperatures during September, with some areas experiencing mean maximum temperatures of up to 3°C below average. All areas east of the Divide experienced average to above average temperatures. This pattern of maximum temperature distribution is directly related to the incidence of rainfall experienced across the state. The wet conditions west of the divide contributed to the below average to very much below average maximum temperatures and the dry conditions east of the divide contributed to the average to above average temperatures. The overall statewide average maximum temperature for NSW during September was 20.0°C which is 0.6°C below the historical average of 20.6°C. This is the lowest September average maximum temperature on record for NSW since 1998, and the second consecutive month with below average day time temperatures in NSW.

The northeastern half of NSW experienced above average to very much above average minimum temperatures, with the far northeastern corner of the state experiencing its highest minimum temperatures on record. The southwestern half of the state experienced average to very much below average minimum temperatures. The overall statewide average minimum temperature for NSW during September was 7.7°C which is 0.6°C above the historical average of 7.1°C. This is the 6th consecutive September with above average minimum temperatures for NSW.

NSW experienced average temperatures during September, with a statewide average mean temperature of 13.8°C.

Some sites had their highest September temperature on record.

See a map of maximum temperature anomalies.

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

See a map of minimum temperature anomalies.

Further information

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Extremes in September 2010
Hottest day 32.1 °C at Bourke Airport AWS on the 2nd
Warmest days on average 24.9 °C at Grafton Olympic Pool
Coolest days on average 3.3 °C at Thredbo AWS
Coldest day -1.3 °C at Thredbo AWS on the 6th
Coldest night -10.6 °C at Perisher Valley AWS on the 30th
Coolest nights on average -2.6 °C at Thredbo AWS
Warmest nights on average 15.2 °C at Lord Howe Island Aero
14.9 °C at Yamba Pilot Station
Warmest night 19.8 °C at Casino Airport on the 28th
Wettest overall 275.4 mm at Thredbo Village
Wettest day 157.0 mm at Thredbo Village on the 5th
Highest wind gust 126 km/h at Bellambi AWS on the 5th

Record highest total September rainfall
Total rainfall
for September 2010 (mm)
Previous highest
for September
Years of
record
Average for
September
Garah Post Office 143.0 130.0 in 1970 105 32.6


Record highest September temperature
Highest temperature
in September 2010 (°C)
Previous highest
for September
Years of
record
Average for
September
Norfolk Island Aero 23.8 on the 30th 23.7 on the 27th in 1998 72 19.0


Record highest September mean daily minimum temperature
Mean daily minimum
temperature
for September 2010 (°C)
Previous highest
for September
Years of
record
Average for
September
Casino Airport 13.4 13.2 in 2008 89 10.2



Summary statistics for September 2010
Maximum temperatures
for September
(°C)
Minimum temperatures
for September
(°C)
Rainfall
for September
(millimetres)
Mean for
September
2010
Diff
from
average
Highest for
September
2010
Mean for
September
2010
Diff
from
average
Lowest for
September
2010
Total for
September
2010
Average
for
September
Rank of
September
2010
Fraction of
September
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 21.0   28.1 1st 9.0   3.1 30th 28.4
Tibooburra Airport 22.0   30.5 1st 11.3   6.3 30th 54.4
Tibooburra Post Office 22.4 -2.1 31.2 2nd 11.4 +1.1 6.4 30th 52.0 12.5 v high 416%
White Cliffs AWS 21.3   29.1 1st 9.9   5.2 30th 29.4
White Cliffs Post Office 21.1 -2.8 29.0 1st 9.3 +0.3 4.2 30th 41.6 15.1 v high 275%
Wilcannia (Reid St) 21.4 -2.1 28.9 1st 8.4 -0.1 1.5 30th 41.0 16.0 v high 256%
Wilcannia Aerodrome AWS 20.7   29.6 1st 8.0   0.9 30th 30.0
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 19.3 -1.8 27.0 1st 8.6 -0.3 4.2 18th 36.0 20.4 high 176%
Broken Hill Airport AWS 18.9 -2.6 26.0 25th 8.1 -0.4 3.0 30th 29.2 21.6 high 135%
Lake Victoria Storage 18.5 -1.9 23.4 25th 7.4 -0.8 3.5 18th 49.1 24.5 high 200%
Menindee Post Office 20.8 -2.1 28.2 25th 9.5 +1.5 3.6 30th 32.3 18.6 high 174%
Pooncarie Mail Agency 20.5   28.2 25th 7.7   1.5 30th 21.7 21.7 average 100%
Western (Upper Darling) (district 48)
Bourke Airport AWS 23.2   32.1 2nd 9.9   4.2 18th 31.8
Brewarrina Hospital 23.6 -1.2 32.0 2nd 10.2 +1.2 1.7 30th 30.5 25.0 average 122%
Cobar Airport AWS 20.3   28.2 2nd 7.1   0.2 18th 49.4
Cobar MO 20.2 -1.7 28.3 2nd 8.4 -0.7 2.1 18th 62.8 25.3 high 248%
Collarenebri (Albert St) 23.3 -1.6 30.4 2nd 10.4 +1.7 1.0 18th 53.2 25.4 high 209%
Lightning Ridge Visitors Information Cen 24.2   31.2 27th 11.0   2.0 18th 53.1
Wanaaring Post Office 22.8   31.3 2nd 10.5   5.3 30th 49.5 14.2 v high 349%
Western (Southwest Plains) (district 49)
Balranald (RSL) 18.0 -2.9 24.6 25th 6.4 -0.7 1.4 30th 34.6 29.4 average 118%
Ivanhoe Aerodrome AWS 19.6   27.0 25th 7.3   0.8 30th 32.6
Ivanhoe Post Office 20.5 -2.1 27.5 25th 6.4 -0.8 -0.5 30th 40.0 22.2 high 180%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 19.0 -1.5 25.5 26th 5.6 -0.3 -2.0 30th 36.0 31.7 high 114%
Condobolin Airport AWS 19.0   25.4 26th 5.7   -1.5 30th 45.0
Peak Hill Post Office 19.5 -0.9 26.8 2nd 8.2 +0.3 2.5 30th 81.4 38.5 v high 211%
West Wyalong Airport AWS 17.3   22.5 27th 6.5   -0.1 30th 97.0
Central Western Plains (North) (district 51)
Coonamble Airport AWS 21.1   28.4 2nd 7.9   0.9 18th 75.4
Nyngan Airport 21.4 -1.2 29.4 2nd 8.4 +0.6 2.5 30th 41.4 27.5 high 151%
Trangie Research Station AWS 20.1 -0.8 27.9 2nd 7.0 +0.6 -0.6 30th 49.8 31.4 high 159%
Northwest Plains (West) (district 52)
Mungindi Post Office 23.2 -1.8 30.5 27th 10.8 +1.5 3.1 18th 46.2 26.8 high 172%
Walgett Airport AWS 23.4   31.7 2nd 8.2   -0.3 18th 38.0
Northwest Plains (East) (district 53)
Moree Aero 22.2   27.4 28th 10.3   2.0 18th 68.2
Northwest Slopes (North) (district 54)
Barraba Post Office 21.0 -0.4 26.0 28th 6.1 +1.9 -1.4 18th 68.1 43.8 high 155%
Narrabri Airport AWS 22.0   27.0 28th 9.3   1.4 18th 46.6
Pindari Dam 21.7 -0.6 27.2 28th 8.2 +1.9 2.0 18th 99.3 48.6 v high 204%
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 21.0   26.4 27th 7.3   0.0 18th 54.4
Gunnedah Pool 21.9 -0.9 27.0 28th 8.7 +1.8 2.0 18th 47.4 39.9 average 119%
Gunnedah Resource Centre 21.0 -0.4 25.7 27th 9.8 +1.3 3.4 18th 42.8 39.6 average 108%
Quirindi Post Office 21.5 0.0 25.4 27th 6.6 +1.6 -1.2 18th 44.2 46.6 average 95%
Tamworth Airport AWS 20.6   25.3 27th 7.3   -0.5 18th 40.2
Woolbrook (Danglemah Road) 17.3 -0.4 22.0 28th 4.4 +2.5 -3.5 18th 67.2 55.5 high 121%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 17.2   21.8 28th 5.0   -4.1 18th 74.2
Armidale Airport AWS 16.2   21.1 28th 6.0   -1.7 18th 75.0
Glen Innes Ag Research Stn 16.3 -0.7 21.0 28th 6.5 +2.4 -2.0 18th 146.2 55.0 v high 266%
Glen Innes Airport AWS 16.7   22.1 28th 5.6   -4.0 18th 171.8
Glen Innes Post Office 17.2 -0.6 22.1 28th 6.9 +2.9 -1.0 18th 144.0 56.3 v high 256%
Guyra Hospital 14.8 -0.6 19.6 28th 5.3 +1.5 -2.5 18th 97.3 60.1 high 162%
Inverell (Raglan St) 20.0   25.2 28th 6.6   -1.0 18th 87.6
Inverell Research Centre 19.5 -0.4 25.2 3rd 8.7 +1.7 1.2 18th 76.0 47.9 high 159%
Tenterfield (Federation Park) 18.5 -1.0 23.9 28th 7.6 +3.0 -0.5 18th 120.4 51.1 v high 236%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 20.2 -1.4 26.4 28th 11.1 +0.7 6.0 18th 92.0 40.0 v high 230%
Upper North Coast (district 58)
Alstonville Tropical Fruit Research Stat 22.1 -0.3 27.5 28th 14.7 +1.9 11.1 7th 114.5 55.6 high 206%
Ballina Airport AWS 23.1   28.7 2nd 13.5   7.6 1st 161.6
Byron Bay (Cape Byron AWS) 22.3   26.4 27th 16.1   13.2 7th 62.8
Casino Airport 24.2 -1.4 29.2 2nd 13.4 +3.2 7.7 1st 110.2 42.5 v high 259%
Casino Airport AWS 23.8   29.1 2nd 13.4   6.9 1st 110.4
Evans Head RAAF Bombing Range AWS 23.5   30.6 2nd 14.4   10.5 12th 114.2
Grafton Airport AWS 23.9   29.8 2nd 11.7   4.9 18th 109.6
Grafton Olympic Pool 24.9 +0.1 30.3 2nd 12.9 +2.5 6.3 18th 99.0 36.7 v high 270%
Grafton Research Stn 24.2   30.1 2nd 12.9   6.5 1st 76.8 43.7 high 176%
Lismore (Richmond Hill) 23.5   28.6 28th 14.0   9.6 12th 105.4
Lismore Airport AWS 23.8   29.3 28th 12.6   6.9 1st 89.4
Murwillumbah (Bray Park) 24.1 -1.0 29.0 28th 13.9 +2.5 8.1 1st 71.8 42.6 high 169%
Yamba Pilot Station 23.0 +1.1 30.6 2nd 14.9 +1.9 10.4 18th 76.6 59.1 high 130%
Lower North Coast (district 59)
Coffs Harbour MO 22.8 +0.9 31.2 2nd 12.7 +1.8 5.9 16th 57.4 62.0 average 93%
Dorrigo (Old Coramba Rd) 18.7   24.5 2nd 8.5   0.8 18th 90.9
Kempsey (Wide Street) 23.8 -0.2 29.2 27th 10.9 +2.0 4.0 18th 67.9 56.3 high 121%
Kempsey Airport AWS 23.9   30.1 2nd 9.5   1.5 18th 62.4
South West Rocks (Smoky Cape Lighthouse) 22.6 +0.9 27.1 28th 13.9 +0.5 10.0 30th 78.6 56.5 high 139%
Manning (district 60)
Forster - Tuncurry Marine Rescue 21.8   25.2 26th 12.2   6.0 1st 11.8 66.6 low 18%
Port Macquarie Airport AWS 22.7   28.0 10th 10.6   4.0 16th 41.6
Taree Airport AWS 22.7   28.2 27th 10.2   2.8 18th 15.6
Yarras (Mount Seaview) 23.2 -0.1 28.4 27th 10.6 +2.1 5.0 18th 136.0 70.9 high 192%
Hunter (district 61)
Cessnock (Nulkaba) 22.9 +0.2 28.1 27th 8.7 +0.9 2.6 12th 22.8 42.6 average 54%
Cessnock Airport AWS 21.9 -0.5 27.7 27th 8.1 +1.2 1.2 12th 20.4 45.5 low 45%
Cooranbong (Lake Macquarie AWS) 21.9   28.4 27th 8.0   2.3 18th 22.6
Gosford (Narara Research Station) AWS 21.6 +0.3 28.5 27th 8.2 +0.5 2.8 18th 38.8 67.6 average 57%
Jerrys Plains Post Office 22.6 -0.3 27.8 2nd 8.1 +1.1 2.0 12th 25.4 41.6 average 61%
Maitland Visitors Centre 22.6   28.7 27th 9.1   2.5 12th 19.5
Mangrove Mountain AWS 20.2   26.6 27th 8.3   2.5 30th 19.6
Merriwa (Roscommon) 20.0   27.3 2nd 6.3   0.9 12th 42.0 37.5 average 112%
Murrurundi Gap AWS 16.8   21.7 26th 8.0   1.4 17th 40.2
Murrurundi Post Office 19.7 -1.0 24.0 25th 6.7 +1.8 0.0 18th 46.8 58.2 average 80%
Nelson Bay (Nelson Head) 21.4 0.0 25.5 27th 13.9 +2.5 10.7 12th 15.8 89.0 v low 18%
Newcastle Nobbys Signal Station AWS 20.8 +0.6 27.3 27th 12.9 +1.5 9.0 17th 20.8 72.7 low 29%
Newcastle University 22.3   28.8 27th 10.8   6.2 12th 23.4
Norah Head AWS 20.6   27.9 27th 12.6   8.4 17th 15.8
Paterson (Tocal AWS) 22.7 +0.4 29.3 27th 9.9 +1.0 4.8 12th 22.8 49.1 average 46%
Peats Ridge (Waratah Road) 20.8 +0.3 27.0 27th 8.7 0.0 3.2 30th 35.6 73.1 low 49%
Scone Airport AWS 21.0   26.1 2nd 7.5   0.6 8th 39.6
Singleton STP 22.0   28.0 2nd 8.2   1.3 12th 30.2
Williamtown RAAF 22.0 +0.7 29.8 27th 9.6 +0.5 3.7 12th 22.2 60.1 low 37%
Central Tablelands (North) (district 62)
Gulgong Post Office 19.3 -0.3 25.7 2nd 6.8 +0.7 1.3 30th 69.0 46.3 high 149%
Mudgee Airport AWS 18.4   24.9 2nd 5.5   -0.8 30th 93.0
Nullo Mountain AWS 13.5   19.5 2nd 4.9   -0.4 30th 97.8
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 16.4 +0.1 22.4 2nd 4.0 +0.6 -3.1 30th 57.0 46.6 average 122%
Bathurst Airport AWS 16.3   22.2 2nd 4.6   -1.8 30th 65.2
Katoomba (Murri St) 15.5 +1.1 20.8 24th 5.7 +0.4 0.8 8th 52.0 72.2 average 72%
Lithgow (Cooerwull) 15.3   21.0 2nd 4.4   -1.5 12th 52.4 56.7 average 92%
Mount Boyce AWS 14.3   20.2 21st 5.1   -0.1 30th 40.0
Oberon (Springbank) 12.8 -0.8 18.7 25th 2.9 +0.6 -3.9 30th 60.3 67.5 average 89%
Orange Agricultural Institute 13.8 -0.2 20.0 22nd 4.5 +0.3 -2.8 30th 102.6 80.2 average 128%
Orange Airport AWS 13.3   19.7 2nd 4.0   -2.7 30th 107.6
Orange Airport Comparison 13.6 -0.1 19.8 2nd 4.4 +1.1 -3.0 30th 97.0 79.0 average 123%
Springwood (Valley Heights) 20.4   27.0 27th 8.9   3.9 17th 35.2 55.6 average 63%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 19.6 -0.8 25.0 2nd 5.1 +1.6 -1.8 18th 64.2 49.7 average 129%
Coonabarabran Airport AWS 18.4   24.9 2nd 8.5   2.6 30th 52.4
Dunedoo Post Office 20.1 -0.5 27.2 2nd 7.2 +1.5 0.0 30th 51.8 42.5 average 122%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 17.7   23.8 26th 5.3   -0.9 30th 54.6
Cowra Airport Comparison 17.8 -0.8 23.8 26th 5.7 +1.3 -1.0 30th 55.2 52.5 average 105%
Dubbo Airport AWS 19.5   26.4 2nd 6.2   -0.2 30th 51.8
Forbes Airport AWS 18.1   24.2 26th 5.9   -1.6 30th 48.6
Parkes (Macarthur Street) 18.9 -0.6 25.2 27th 7.1 -0.2 0.5 30th 66.9 42.0 high 159%
Parkes Airport AWS 17.6   23.0 27th 5.3   -1.0 30th 75.0 44.5 high 169%
Wellington (Agrowplow) 19.5 -1.2 26.5 2nd 6.2 +0.8 0.4 30th 72.6 44.3 high 164%
Metropolitan (East) (district 66)
Bankstown Airport AWS 21.4 -0.1 27.3 27th 9.2 +0.6 4.9 18th 45.4 44.7 average 102%
Canterbury Racecourse AWS 20.9   27.0 27th 9.2   4.8 18th 65.6
Holsworthy Control Range 21.3   27.0 27th 8.2   3.4 8th 49.0
Parramatta North (Masons Drive) 21.7 +0.1 27.8 27th 9.1 -0.2 4.9 30th 39.9 53.4 average 75%
Riverview Observatory 20.9 +0.2 27.2 27th 10.2 +0.8 6.3 30th 80.2 62.3 high 129%
Sydney (Observatory Hill) 21.0 +1.0 27.1 27th 12.3 +1.2 8.2 8th 42.2 68.9 average 61%
Sydney Airport AMO 21.1 +0.6 28.2 28th 11.9 +1.6 7.5 8th 31.8 60.8 average 52%
Sydney Harbour (Wedding Cake West) 19.4   26.1 27th 13.1   9.6 8th
Sydney Olympic Park (Sydney Olympic Pk A 22.0   29.1 27th 11.2   7.2 8th 69.8
Terrey Hills AWS 19.6   26.1 27th 10.3   5.1 18th 75.6
Metropolitan (West) (district 67)
Badgerys Creek AWS 21.2   26.9 27th 7.8   3.1 17th 41.8
Horsley Park Equestrian Centre AWS 21.0   27.0 27th 8.7   3.4 18th 58.8
Liverpool (Michael Wenden Centre) 21.7   27.2 28th 8.4   3.0 8th 40.3
Penrith Lakes AWS 22.2   29.8 27th 8.9   3.5 17th 26.4
Prospect Reservoir 21.8 +0.5 27.2 27th 9.2 -0.2 4.4 17th 29.9 47.1 average 63%
Richmond RAAF 21.9   28.8 27th 7.4   2.2 17th 25.0
Illawarra (district 68)
Albion Park (Wollongong Airport) 20.4   28.0 27th 8.6   2.0 30th 112.0
Bellambi AWS 19.5   27.0 27th 11.9   7.3 8th 105.6
Bowral (Parry Drive) 15.9 -0.3 21.5 27th 6.3 +1.2 0.0 30th 48.6 57.0 average 85%
Camden Airport AWS 21.5 -0.4 27.7 27th 7.3 +0.6 2.1 12th 48.0 39.7 average 121%
Campbelltown (Mount Annan) 21.4   26.8 28th 7.6   2.0 8th 55.2
Jervis Bay (Point Perpendicular AWS) 18.0   25.1 27th 11.5   8.6 9th 121.2
Kiama (Bombo Headland) 19.6   28.3 27th 11.6   7.1 30th 121.0
Moss Vale AWS 15.8   21.6 27th 5.4   -1.3 30th 35.0
Nowra RAN Air Station AWS 20.0   27.2 27th 8.5   3.8 30th 31.4
South Coast (district 69)
Batemans Bay (Catalina Country Club) 19.0   25.2 27th 6.9   0.4 30th 39.4 62.1 average 63%
Bega AWS 19.0   24.1 27th 4.7   -0.3 3rd 26.6
Braidwood Racecourse AWS 15.8   21.3 24th 3.7   -3.5 30th 55.6 52.9 average 105%
Green Cape AWS 16.8   19.5 13th 10.1   7.1 30th 22.0
Merimbula Airport AWS 18.2   22.0 13th 5.9   2.0 3rd 29.2
Montague Island Lighthouse 16.9 -0.5 22.0 27th 11.4 +0.2 8.5 30th 27.0 57.0 average 47%
Moruya Airport AWS 18.8   27.1 27th 7.3   -0.1 30th 31.8
Moruya Heads Pilot Station 18.1 -0.6 25.4 27th 8.8 +0.3 3.1 30th 39.0 60.4 average 65%
Narooma Vmr 17.4 -0.8 22.1 27th 8.9 0.0 5.1 30th 33.9 60.5 average 56%
Nerriga Composite 16.5 +0.2 24.0 21st 4.9 +1.5 -2.5 12th 34.2 53.2 average 64%
Ulladulla AWS 18.1   24.5 27th 10.5   6.1 30th 70.8
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 16.2 +0.5 22.2 24th 1.4 -0.8 -2.2 8th 31.6 44.4 average 71%
Bombala AWS 14.1   19.9 24th 1.9   -3.5 8th 21.0
Canberra Airport 16.3   21.2 21st 4.0   -1.9 30th 65.8
Canberra Airport Comparison 16.2 0.0 21.4 21st 4.6 +1.4 -1.0 30th 34.0 52.0 low 65%
Cooma Airport AWS 14.9   22.2 24th 0.4   -7.5 30th 8.6 36.2 v low 24%
Cooma Visitors Centre 16.2 0.0 22.2 24th 0.9 -0.3 -6.2 30th 10.2 35.3 v low 29%
Goulburn Airport AWS 15.5   21.3 21st 3.8   -1.1 30th 37.2
Goulburn TAFE 15.5 -1.0 21.0 26th 5.2 +0.7 -1.5 30th 44.2 49.5 average 89%
Mount Ginini AWS 8.3   17.4 21st -0.2   -5.2 17th 123.4
Taralga Post Office 15.5 +0.7 22.0 21st 3.2 +0.1 -3.5 30th 57.9 61.9 average 94%
Tidbinbilla Nature Reserve 16.0 +0.5 20.5 21st 4.7 +1.0 -1.0 30th 121.4 91.7 high 132%
Tuggeranong (Isabella Plains) AWS 16.7   21.6 26th 4.1   -2.0 30th 99.0
Yass (Linton Hostel) 16.4 -0.3 21.5 26th 5.3 +1.3 -1.5 30th 81.6 56.8 high 144%
Southern Tablelands (Snowy Mountains) (district 71)
Charlotte Pass (Kosciusko Chalet) 4.6 -0.4 9.1 21st     -12.1 8th 167.4 191.5 average 87%
Perisher Valley AWS 5.8   11.5 20th -2.1   -10.6 30th 259.4
Thredbo AWS 3.3 +0.2 9.1 20th -2.6 +0.5 -8.3 8th 174.2 150.9 average 115%
Thredbo Village 9.9 +0.3 15.7 21st -0.2 +0.4 -6.0 30th 275.4 216.1 average 127%
Southwest Slopes (South) (district 72)
Albury Airport AWS 16.6   20.6 26th 5.5   -0.1 30th 75.6
Cabramurra SMHEA AWS 7.9   16.0 21st 0.9   -3.7 17th 144.0
Hume Reservoir 16.4 -0.9 21.2 26th 6.3 -0.4 0.9 30th 80.2 62.2 high 129%
Khancoban AWS 15.9   21.6 21st 4.9   -1.7 30th 113.2
Tumbarumba Post Office 14.8 -0.4 21.0 21st 3.4 +0.4 -2.9 30th 116.6 91.1 high 128%
Wagga Wagga AMO 16.7 -0.9 20.9 26th 5.3 +0.2 -0.4 30th 64.4 49.8 high 129%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 16.8 +0.1 22.1 26th 6.5 +0.9 1.5 30th 129.0 84.2 high 153%
Cootamundra Airport 16.5   21.0 26th 4.1   -2.0 30th 76.8
Gundagai (William St) 16.9   20.9 26th 5.6   -0.2 30th 80.2
Quandialla Post Office 18.0 -1.5 23.6 27th 6.8 +1.3 -0.5 30th 78.0 40.8 v high 191%
Temora Airport 16.6   21.4 26th 5.0   -1.4 30th 63.4
Wyalong Post Office 17.9 -1.6 24.4 26th 7.3 +1.2 1.3 30th 70.6 36.9 high 191%
Young Airport 16.2   21.6 27th 4.2   -3.0 30th 73.6
Riverina (East) (district 74)
Corowa Airport 16.6 -1.9 21.0 26th 5.1 -0.6 0.2 30th 56.8 48.5 average 117%
Deniliquin Airport AWS 16.8   23.0 25th 5.1   0.1 30th 48.2
Narrandera Airport 17.2   22.5 27th 4.9   -1.4 30th 62.4 36.6 high 170%
Narrandera Golf Club 17.1 -2.1 22.6 25th 5.6 -0.5 1.7 8th 56.7 41.9 high 135%
Tocumwal Airport 16.6 -2.2 22.6 25th 5.4 -0.9 0.1 30th 53.0 39.2 high 135%
Yanco Agricultural Institute 17.2   22.5 25th 6.3   0.8 30th 60.2
Riverina (West) (district 75)
Griffith Airport AWS 17.7 -2.1 23.1 25th 5.3 -0.5 -1.2 30th 54.4 33.2 high 164%
Hay (Miller Street) 17.9 -2.8 25.0 25th 6.0 -0.7 0.4 30th 62.4 31.6 high 197%
Hay Airport AWS 17.7   25.3 25th 5.0   -1.2 30th 53.8
Hillston Airport 18.9 -1.8 25.5 27th 5.9 -1.3 -0.5 30th 78.6 28.0 v high 281%
Lake Cargelligo Airport 18.5 -3.0 24.5 27th 6.8 -0.3 1.0 30th 52.8 31.5 high 168%

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 2 pm on Friday 1 October 2010. 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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