NSW in summer 2010-11: Wettest summer in 29 years

  • 5th wettest summer on record for NSW.
  • 3rd wettest summer on record in the Murray-Darling Basin.
  • Well above average night time temperatures, 14th warmest minimums on record.

Rainfall

NSW recorded 272.2mm of rainfall during summer, well above the historical average of 170.4mm and the 5th wettest summer on record for NSW, the wettest since 1983. Rainfall was above average throughout the season, with particularly wet conditions in western regions during January and February as conditions in the north and east began to dry. In addition, the Murray-Darling Basin recorded 270.6mm during summer, its third wettest summer on record following the very wet periods in 1973/4 (286.8mm) and 1975/6 (336.1mm). The high rainfall followed record-breaking falls during spring, a consequence of the strong La Niña event that developed in the Pacific Ocean over 2010.

Several very significant rainfall events during summer brought major flooding to NSW, with 84 Natural Disaster Declarations during the season. The first major event occurred during the first weeks of December, as heavy rains caused flooding across southern and western NSW. Widespread evacuations occurred with over a hundred flood rescues and major infrastructure damage in key rural centres including Orange, Dubbo, Wagga Wagga and Tamworth. Reports suggested this was the most severe flooding in 50 years in some regions.

The second major flood event occurred over the last week of December and early January, as heavy rain on the north coast of NSW and southern Queensland caused significant flooding in northern parts of the state. Hundreds of people were evacuated and thousands isolated during the first weeks of January, with further flooding in western regions throughout January and February as floodwaters progressed southward through the Darling river system.

The third major event occurred between the 12th and 14th of January, as a trough system over central NSW directed very heavy rainfall into the west of the state, with many areas experiencing record-breaking totals and some riverine flooding, although flooding was most severe in Victoria. Finally, a similar trough system between the 2nd and 6th of February brought further rain to western and southern parts of NSW, resulting in further riverine flooding along the Murray.

Some sites had their highest total summer rainfall on record. Some sites had their lowest total summer rainfall on record.

See a map of rainfall deciles.

Temperature

The average temperature in NSW was 24.5 °C during summer, slightly above the historical average of 24.2 °C. Temperatures were warmest in January, which was the 11th warmest on record for mean temperatures, with close to average temperatures in February but very much below average temperatures in December, the 10th coolest on record. The average temperatures were a result of generally below average maximum temperatures across almost all of the state but warmer than average nights, particularly in the east.

Maximum temperatures averaged 29.9 °C during summer, 0.3 °C below the historical average of 31.2 °C, with the majority of the state experiencing temperatures 1 to 2 °C below average. This was a result of the significant rainfall during the season, particularly in western regions, with very cold conditions in December but warmer temperatures in January and February. Warmer conditions were experienced in coastal regions associated with warm sea surface temperatures, particularly in the metropolitan and hunter regions. Daily temperatures varied significantly during the season, with some very warm conditions experienced on the 26th and 27th of January and in eastern regions between January 31 and February 6, but very cold conditions between the 19th and 21st of December and record-breaking cold at Broken Hill as a cool change entered the state on February 6.

Night time temperatures were warmer during summer with a statewide average of 18.0 °C, 0.9 °C above the historical average of 17.1 °C and the 14th warmest on record. Unlike maximum temperatures, minimums were only slightly below average in December, with well above average temperatures in January and February, with almost all of the state recording above average minimums. Minimums were particularly warm in eastern parts of the state, with most of the coastal region experiencing temperatures more than 1 °C above average and several stations experiencing their warmest average summer minimums on record during a heatwave in early February. However, very cool conditions between the 20th and 21st of December also broke several summer records for coolest minimums.

Some sites had their highest summer temperature on record. Some sites had their coldest summer day (lowest maximum temperature) on record. See a map of maximum temperature anomalies.

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

Other phenomena

Conditions were windiest during December and February, with gusts above 100km/hr recorded on December 15, 19, 20, and 27 and on February 1, 4, 5 and 19, but a maximum gust of just 85km/hr on the mainland in January. The strongest wind gust recorded during the season was 130km/hr at Thredbo on January 19.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in summer 2010-11
Hottest day 45.8 °C at Condobolin Ag Research Stn on 26 Jan 2011
Warmest days on average 34.8 °C at Tibooburra Airport
34.8 °C at Tibooburra Post Office
Coolest days on average 17.4 °C at Perisher Valley AWS
Coldest day 4.2 °C at Charlotte Pass (Kosciusko Chalet) on 20 Dec 2010
Coldest night -3.0 °C at Oberon (Springbank) on 21 Dec 2010
-3.0 °C at Thredbo AWS on 28 Dec 2010
Coolest nights on average 6.8 °C at Charlotte Pass (Kosciusko Chalet)
Warmest nights on average 22.1 °C at Tibooburra Post Office
Warmest night 29.6 °C at Tibooburra Airport on 26 Jan 2011
29.6 °C at Tibooburra Post Office on 26 Jan 2011
Warmest on average overall 28.4 °C at Tibooburra Post Office
Coolest on average overall 12.3 °C at Perisher Valley AWS
Wettest overall 1421.0 mm at Hopkins Creek
Wettest day 209.8 mm at Cangai (Smelter Creek) on 11 Jan 2011
Highest wind gust 130 km/h at Thredbo AWS on 19 Feb 2011

Record highest total summer rainfall
Total rainfall
for summer 2010-11 (mm)
Previous wettest
for summer
Years of
record
Average for
summer
Wentworth Post Office 271.6 261.0 in 1910 141 64.8
Urana Post Office 344.8 314.7 in 1973 138 97.7
Balranald (RSL) 331.1 216.6 in 1973 132 73.3
Hay (Miller Street) 365.2 319.3 in 1973 132 84.0
Crookwell Post Office 425.6 423.5 in 1947 128 189.5
Pooncarie Mail Agency 374.1 259.0 in 1962 127 67.0
Holbrook (RSL) 495.1 343.8 in 1954 126 142.0
Tumbarumba Post Office 453.2 394.9 in 1886 125 187.6
Cockburn (Burta) 323.6 301.3 in 1992 121 62.3
Coolamon Post Office 352.1 327.0 in 1973 121 115.9
Corowa Airport 469.7 413.3 in 1933 120 115.0
Maude Post Office 374.3 235.6 in 1999 116 76.1
Tocumwal Airport 325.8 315.2 in 1973 113 95.6
Henty Post Office 506.5 341.2 in 1983 110 124.7
Barham (Thule Street) 222.4 214.6 in 1992 106 75.2
Culcairn Bowling Club 461.0 328.6 in 1973 97 127.2
Mulwala Post Office 352.4 275.0 in 1933 97 111.3
Old Koreelah (McPherson) 826.4 775.8 in 1975 96 343.5
Ivanhoe (Kilfera) 229.0 208.7 in 1945 90 68.5
Hume Reservoir 429.4 416.8 in 1983 89 138.7
Lake Victoria Storage 361.1 170.7 in 1972 89 59.6
Oxley (Walmer Downs) 360.6 330.9 in 1973 87 84.3
Wentworth (Wamberra Station) 345.4 193.8 in 1910 83 61.4
Wentworth (Willow Point) 274.2 242.4 in 1992 78 70.6
Wagga Wagga AMO 367.2 308.6 in 1983 70 128.3
Rand Post Office 355.3 316.5 in 1973 57 117.7
Tharwa General Store 462.8 320.9 in 1940 56 171.6
Broken Hill Airport AWS 270.6 255.0 in 1975 49 70.3
Euston (Turlee) 383.6 236.0 in 1973 49 78.7
Narrandera Airport 262.8 249.7 in 1973 42 108.7
Wentworth (Tarawi) 480.6 248.9 in 1992 42 82.5
Narrandera Golf Club 279.5 = 279.5 in 1973 41 115.1
Stockinbingal (Sunnydale) 281.6 274.2 in 1971 41 130.1
Thredbo Village 810.0 504.4 in 1973 40 324.3
Coleambally Irrigation 269.0 237.7 in 1983 32 105.9
Broken Hill (Koralta) 373.4 212.1 in 1983 28 61.1
Thredbo AWS 588.8 490.3 in 1973 27 298.8
Morundah Hotel 291.2 185.2 in 1940 25 92.7
Cooma Airport AWS 324.6 237.6 in 1983 24 146.2



Record lowest total summer rainfall
Total rainfall
for summer 2010-11 (mm)
Previous driest
for summer
Years of
record
Average for
summer
Gosford North (Glennie St) 217.5 231.4 in 2005 26 393.7



Record highest summer temperature
Highest temperature
in summer 2010-11 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Scone SCS 43.5 on 27 Jan 2011 = 43.5 on 2 Feb 2006 47 30.4



Record lowest summer daily maximum temperature
Lowest daily maximum
temperature
in summer 2010-11 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Broken Hill Airport AWS 17.0 on 6 Feb 2011 19.0 on 12 Feb 1992 23 32.2



Record highest summer daily minimum temperature
Highest daily minimum
temperature
in summer 2010-11 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Sydney (Observatory Hill) 27.6 on 6 Feb 2011 26.6 on 6 Feb 1973 153 18.3
Sydney Airport AMO 26.4 on 6 Feb 2011 25.8 on 23 Jan 2010 72 18.4
Williamtown RAAF 26.9 on 6 Feb 2011 25.7 on 10 Jan 1983 62 17.5
Newcastle Nobbys Signal Station AWS 26.0 on 6 Feb 2011 25.5 on 15 Jan 1978 55 18.8
Dunedoo Post Office 28.3 on 3 Feb 2011 27.5 on 11 Feb 2004 45 16.3
Bankstown Airport AWS 26.0 on 2 Feb 2011 25.0 on 8 Dec 1990 43 17.6
Gulgong Post Office 27.2 on 3 Feb 2011 26.5 on 6 Feb 1973 39 15.9
Camden Airport AWS 24.0 on 3 Feb 2011 = 24.0 on 23 Dec 2000 36 16.2
Narooma Vmr 21.8 on 3 Feb 2011 = 21.8 on 22 Feb 2010 28 16.1
Riverview Observatory 26.2 on 6 Feb 2011 25.7 on 22 Dec 1997 28 17.2



Record lowest summer temperature
Lowest temperature
in summer 2010-11 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Wilcannia (Reid St) 8.4 on 20 Dec 2010 8.6 on 13 Dec 1995 55 19.1
Inverell Research Centre 5.8 on 21 Dec 2010 6.0 on 29 Dec 2004 47 15.9
Trangie Research Station AWS 6.2 on 20 Dec 2010 6.7 on 28 Dec 1993 43 17.8
Tabulam (Muirne) 9.7 on 21 Dec 2010 = 9.7 on 13 Dec 1995 41 16.7
Lostock Dam 6.8 on 21 Dec 2010 7.3 on 18 Dec 1969 40 16.9
Glen Innes Ag Research Stn 2.0 on 21 Dec 2010 = 2.0 on 29 Dec 2004 38 13.0
Oberon (Springbank) -3.0 on 21 Dec 2010 0.4 on 4 Dec 1987 29 10.3



Record highest summer mean daily minimum temperature
Mean daily minimum
temperature
for summer 2010-11 (°C)
Previous warmest
for summer
Years of
record
Average for
summer
Tumbarumba Post Office 13.4 13.3 in 1972 42 11.2
Bowral (Parry Drive) 14.5 = 14.5 in 2000 41 12.8
Yarras (Mount Seaview) 18.5 = 18.5 in 2009 41 16.9
Orange Airport Comparison 13.6 13.5 in 1980 40 11.5
Nerriga Composite 13.5 13.4 in 1972 37 12.0
Thredbo Village 8.7 8.5 in 2005 33 6.4
Goulburn TAFE 14.4 = 14.4 in 2003 32 12.9



Summary statistics for summer 2010-11
Maximum temperatures
for summer
(°C)
Minimum temperatures
for summer
(°C)
Rainfall
for summer
(millimetres)
Mean for
summer
2010-11
Diff
from
average
Highest for
summer
2010-11
Mean for
summer
2010-11
Diff
from
average
Lowest for
summer
2010-11
Total for
summer
2010-11
Average
for
summer
Rank of
summer
2010-11
Fraction of
summer
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 33.2   42.3 25 Jan 2011     10.3 20 Dec 2010 346.0
Tibooburra Airport 34.8   43.9 26 Jan 2011 21.8   12.9 20 Dec 2010 61.4
Tibooburra Post Office 34.8 -0.6 44.6 26 Jan 2011 22.1 +0.8 12.9 20 Dec 2010 182.6 80.1 v high 228%
White Cliffs AWS 34.2   42.8 1 Jan 2011 20.9   10.3 20 Dec 2010 206.6
White Cliffs Post Office 33.9 -1.2 42.9 1 Jan 2011 19.9 -0.3 8.6 20 Dec 2010 208.9 80.3 v high 260%
Wilcannia (Reid St) 33.4 -1.3 42.7 1 Jan 2011 19.5 +0.4 8.4 20 Dec 2010 247.7 78.0 v high 318%
Wilcannia Aerodrome AWS 33.5   42.9 1 Jan 2011 19.0   9.1 20 Dec 2010 237.6
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 31.6 -0.5 42.5 1 Jan 2011 18.8 +0.8 9.6 20 Dec 2010 315.2 71.6 v high 440%
Broken Hill Airport AWS 31.0 -1.2 42.0 1 Jan 2011 18.2 0.0 9.0 20 Dec 2010 270.6 70.3 highest 385%
Lake Victoria Storage 30.5 -0.8 42.5 31 Dec 2010 17.2 +1.1 10.5 27 Dec 2010 361.1 59.6 highest 606%
Menindee Post Office 32.5 -1.1 43.0 31 Dec 2010 19.4 +1.6 11.8 20 Dec 2010 310.2 67.8 v high 458%
Pooncarie Mail Agency 32.6   44.1 1 Jan 2011 17.9   9.9 21 Dec 2010 374.1 67.0 highest 558%
Western (Upper Darling) (district 48)
Bourke Airport AWS 33.8   44.9 26 Jan 2011 20.4   8.0 21 Dec 2010 287.2
Brewarrina Hospital 34.0 -1.5 45.0 26 Jan 2011 20.6 +0.6 9.9 21 Dec 2010 187.0 138.3 high 135%
Cobar Airport AWS 32.9   44.3 26 Jan 2011 19.3   7.9 21 Dec 2010 144.8
Cobar MO 33.0 -0.3 44.3 26 Jan 2011 19.7 -0.1 9.5 20 Dec 2010 124.2 127.5 average 97%
Collarenebri (Albert St) 33.9 -1.0 44.0 26 Jan 2011 21.1 +1.2 8.8 21 Dec 2010 179.2 178.5 average 100%
Lightning Ridge Visitors Information Cen 34.2   44.0 26 Jan 2011 21.5   8.9 21 Dec 2010 110.9
Wanaaring Post Office 34.4   45.5 26 Jan 2011 21.2   9.2 21 Dec 2010 256.7 100.1 v high 256%
Western (Southwest Plains) (district 49)
Balranald (RSL) 30.3 -1.9 41.6 31 Dec 2010 17.0 +1.2 8.1 20 Dec 2010 331.1 73.3 highest 452%
Ivanhoe Aerodrome AWS 32.0   42.7 1 Jan 2011 18.1   9.6 28 Dec 2010 206.2
Ivanhoe Post Office 32.9 -1.2 43.2 31 Dec 2010 17.9 +0.5 9.0 29 Dec 2010 232.8 83.0 v high 280%
Central Western Plains (South) (district 50)
Condobolin Airport AWS 32.6   44.9 26 Jan 2011 17.9   7.7 22 Dec 2010
Peak Hill Post Office 31.6 -0.7 42.4 26 Jan 2011 19.4 +0.8 6.8 20 Dec 2010 243.9 160.7 high 152%
West Wyalong Airport AWS 31.6   41.8 26 Jan 2011 16.9   7.7 28 Dec 2010 289.6
Central Western Plains (North) (district 51)
Coonamble Airport AWS 32.9   43.0 27 Jan 2011 19.3   6.8 20 Dec 2010
Nyngan Airport 33.5 0.0 45.3 26 Jan 2011 19.6 +0.8 9.0 21 Dec 2010 141.5 141.7 average 100%
Trangie Research Station AWS 32.0 -0.4 42.7 26 Jan 2011 18.4 +0.6 6.2 20 Dec 2010 279.6 147.6 v high 189%
Northwest Plains (West) (district 52)
Mungindi Post Office 34.4 -0.2 42.7 25 Jan 2011 21.0 +1.1 8.2 21 Dec 2010 87.9 186.4 low 47%
Walgett Airport AWS 33.8   43.7 26 Jan 2011 20.1   7.8 21 Dec 2010 156.6
Northwest Plains (East) (district 53)
Moree Aero 32.8   41.4 26 Jan 2011 19.9   8.1 21 Dec 2010 150.2
Northwest Slopes (North) (district 54)
Barraba Post Office 31.0 -0.1 40.4 26 Jan 2011 16.1 +0.4 4.0 21 Dec 2010 248.8 242.2 average 103%
Northwest Slopes (South) (district 55)
Gunnedah Pool 31.9 -1.4 41.3 26 Jan 2011 19.4 +1.7 8.8 21 Dec 2010 325.0 208.7 high 156%
Gunnedah Resource Centre 31.1 -0.2 40.4 26 Jan 2011 19.3 +1.0 8.6 20 Dec 2010 301.8 229.4 high 132%
Quirindi Post Office 31.5 -0.1 41.4 27 Jan 2011 16.9 +1.1 5.4 21 Dec 2010 217.1 227.4 average 95%
Tamworth Airport AWS 31.3   40.6 26 Jan 2011 17.3   5.6 21 Dec 2010 231.4
Woolbrook (Danglemah Road) 26.2 -0.7 36.0 26 Jan 2011 13.5 +1.6 2.0 21 Dec 2010 289.8 273.7 average 106%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 25.1   34.4 26 Jan 2011 13.2   1.2 21 Dec 2010 289.2
Armidale Airport AWS 24.3   33.1 27 Jan 2011 13.7   3.8 21 Dec 2010 350.2
Glen Innes Ag Research Stn 24.4 -0.4 33.0 26 Jan 2011 13.6 +0.6 2.0 21 Dec 2010 372.5 310.5 high 120%
Glen Innes Airport AWS 23.9   32.3 26 Jan 2011 13.4   0.0 21 Dec 2010 420.0
Glen Innes Post Office 25.2 -0.7 34.4 26 Jan 2011 14.8 +1.9 2.9 21 Dec 2010 424.9 313.6 v high 135%
Guyra Hospital 23.1 -0.2 32.1 26 Jan 2011 12.5 +1.0 1.4 21 Dec 2010 330.8 341.3 average 97%
Inverell (Raglan St) 28.8   37.3 26 Jan 2011 15.6   4.0 21 Dec 2010 331.6
Inverell Research Centre 28.1 -0.7 36.5 26 Jan 2011 16.6 +0.7 5.8 21 Dec 2010 335.2 296.1 average 113%
Tenterfield (Federation Park) 25.1 -1.5 33.5 20 Feb 2011 14.7 +0.8 2.5 21 Dec 2010 540.8 314.4 v high 172%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 25.4 -1.2 33.4 20 Feb 2011 16.5 -0.2 9.7 21 Dec 2010 940.8 513.9 v high 183%
Upper North Coast (district 58)
Alstonville Tropical Fruit Research Stat 26.8 -0.2 35.3 20 Feb 2011 19.6 +0.4 14.5 21 Dec 2010 850.3 557.5 v high 153%
Ballina Airport AWS 27.9   33.8 20 Feb 2011 19.9   11.0 21 Dec 2010 812.2
Byron Bay (Cape Byron AWS) 27.4   32.4 19 Jan 2011 20.9   16.4 20 Dec 2010 725.2
Casino Airport 29.4 -1.6 37.3 20 Feb 2011 19.7 +1.2 10.8 21 Dec 2010 482.2 410.4 average 117%
Casino Airport AWS 28.7   37.0 20 Feb 2011 19.5   10.9 21 Dec 2010 490.0
Evans Head RAAF Bombing Range AWS 27.9   35.9 20 Feb 2011 19.9   15.0 21 Dec 2010 698.6
Grafton Airport AWS 29.0   37.6 20 Feb 2011 19.2   8.7 21 Dec 2010 477.4
Grafton Olympic Pool 29.6 -0.1 38.1 20 Feb 2011 20.0 +0.7 11.0 21 Dec 2010 391.2 404.7 average 97%
Grafton Research Stn 28.9   37.4 20 Feb 2011 19.7   11.5 21 Dec 2010 369.6 358.0 average 103%
Lismore (Richmond Hill) 28.3   35.7 20 Feb 2011 19.4   12.4 21 Dec 2010 729.6
Lismore Airport AWS 28.8   37.0 20 Feb 2011 18.9   9.1 21 Dec 2010 586.6
Murwillumbah (Bray Park) 28.4 -0.8 35.5 20 Feb 2011 20.0 +0.8 11.8 21 Dec 2010 900.3 601.5 high 150%
Yamba Pilot Station 27.0 +0.6 30.8 20 Feb 2011 20.8 +0.9 14.4 21 Dec 2010 677.8 414.8 v high 163%
Lower North Coast (district 59)
Coffs Harbour MO 27.1 +0.4 33.7 6 Feb 2011 19.8 +0.8 9.6 21 Dec 2010 779.2 548.1 high 142%
Dorrigo (Old Coramba Rd) 24.0   32.5 6 Feb 2011 14.9   3.6 21 Dec 2010 781.5
Kempsey (Wide Street) 28.9 0.0 38.7 20 Feb 2011 19.1 +1.7 8.6 21 Dec 2010 405.9 399.3 average 102%
Kempsey Airport AWS 28.7   38.2 20 Feb 2011 18.1   7.6 21 Dec 2010 374.8
South West Rocks (Smoky Cape Lighthouse) 27.1 +0.6 30.7 14 Feb 2011     15.1 24 Feb 2011 367.0 438.6 average 84%
Manning (district 60)
Forster - Tuncurry Marine Rescue 26.1   33.2 20 Feb 2011 19.3   13.0 21 Dec 2010 256.7 318.3 average 81%
Port Macquarie Airport AWS 27.7   36.0 20 Feb 2011 18.5   8.0 21 Dec 2010 275.4
Taree Airport AWS 28.5   37.9 6 Feb 2011 18.6   8.2 21 Dec 2010 262.6
Yarras (Mount Seaview) 28.3 -0.3 39.2 5 Feb 2011 18.5 +1.6 8.0 21 Dec 2010 807.6 648.7 high 124%
Hunter (district 61)
Cessnock (Nulkaba) 30.8 +1.0 43.2 26 Jan 2011 18.1 +0.9 10.6 25 Feb 2011 122.4 262.8 low 47%
Cessnock Airport AWS 30.1   43.1 26 Jan 2011 17.5   9.1 25 Feb 2011 145.2 248.9 low 58%
Cooranbong (Lake Macquarie AWS) 28.5   40.9 1 Feb 2011 17.6   9.3 21 Dec 2010 185.6
Gosford (Narara Research Station) AWS 28.3 +1.1 41.2 5 Feb 2011 17.6 +1.1 9.3 21 Dec 2010
Jerrys Plains Post Office 31.6 +0.3 43.6 26 Jan 2011 18.1 +1.5 7.0 21 Dec 2010 230.3 219.3 average 105%
Maitland Visitors Centre     41.4 5 Feb 2011 18.4   10.4 22 Dec 2010 137.4
Mangrove Mountain AWS 27.5   38.9 5 Feb 2011 17.1   9.8 20 Dec 2010 159.6
Merriwa (Roscommon) 29.8   41.5 26 Jan 2011 16.3   6.6 20 Dec 2010 267.4 208.3 high 128%
Murrurundi Gap AWS 26.4   36.9 26 Jan 2011 16.1   5.7 20 Dec 2010 238.2
Murrurundi Post Office 28.9 -1.2 38.8 26 Jan 2011 15.9 +1.3 4.4 21 Dec 2010 235.0 258.1 average 91%
Nelson Bay (Nelson Head) 27.1 +0.3 38.5 3 Feb 2011 20.3 +2.2 13.7 20 Dec 2010 151.7 305.6 low 50%
Newcastle Nobbys Signal Station AWS 26.1 +0.8 39.1 3 Feb 2011 20.2 +1.4 12.5 20 Dec 2010 112.0 275.7 v low 41%
Newcastle University 29.3   41.2 1 Feb 2011 19.6   10.8 20 Dec 2010 182.2
Norah Head AWS 26.7   39.7 3 Feb 2011 19.8   13.3 20 Dec 2010 147.2
Paterson (Tocal AWS) 30.6 +1.4 41.9 1 Feb 2011 18.4 +1.3 12.0 20 Dec 2010 225.9 303.0 average 75%
Peats Ridge (Waratah Road) 27.1 +0.6 38.8 5 Feb 2011 17.2 +1.4 9.1 20 Dec 2010 233.8 369.3 low 63%
Scone Airport AWS 30.7   42.5 26 Jan 2011 17.1   6.8 21 Dec 2010 145.6
Singleton STP 31.1   42.5 26 Jan 2011 17.9   9.5 24 Feb 2011 76.3
Williamtown RAAF 29.6 +2.0 42.9 5 Feb 2011 18.5 +1.0 9.4 21 Dec 2010 122.8 297.4 v low 41%
Central Tablelands (North) (district 62)
Gulgong Post Office 29.4 -0.7 40.7 26 Jan 2011 17.0 +1.1 5.8 20 Dec 2010 329.7 199.1 high 166%
Mudgee Airport AWS 28.6   38.7 26 Jan 2011 16.0   4.7 21 Dec 2010 284.8
Nullo Mountain AWS 22.2   33.1 26 Jan 2011 13.7   2.5 20 Dec 2010 350.8
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 27.1 -0.1 36.7 26 Jan 2011 13.4 +0.6 4.3 22 Dec 2010 296.9 192.3 high 154%
Bathurst Airport AWS 27.2   35.7 26 Jan 2011 13.7   4.4 22 Dec 2010 305.0
Katoomba (Murri St) 23.2 +0.5 34.4 31 Jan 2011 14.0 +1.6 4.1 20 Dec 2010 492.4 456.2 average 108%
Lithgow (Cooerwull) 24.5   34.8 26 Jan 2011 13.4   3.3 22 Dec 2010 335.8 238.4 high 141%
Mount Boyce AWS 23.1   33.9 31 Jan 2011 13.4   2.9 20 Dec 2010 424.6
Oberon (Springbank) 23.1 -0.8 33.3 31 Jan 2011 11.8 +1.5 -3.0 21 Dec 2010 265.8 215.5 high 123%
Orange Agricultural Institute 24.4 -1.2 33.4 26 Jan 2011 13.6 +1.0 3.2 20 Dec 2010 410.2 250.5 high 164%
Orange Airport AWS 24.7   33.9 26 Jan 2011 13.0   3.4 20 Dec 2010 404.0
Orange Airport Comparison 24.7 -0.4 33.8 26 Jan 2011 13.6 +2.1 3.2 20 Dec 2010 388.2 245.1 high 158%
Springwood (Valley Heights) 27.6   38.8 1 Feb 2011 17.3   10.0 20 Dec 2010 317.6 366.7 average 87%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 29.7 -1.3 40.4 26 Jan 2011 15.6 +1.3 4.0 21 Dec 2010 360.8 243.8 high 148%
Dunedoo Post Office 30.6 -0.5 42.6 26 Jan 2011 17.7 +1.4 6.4 20 Dec 2010 336.5 197.4 v high 170%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 30.2   41.4 26 Jan 2011 16.0   6.5 22 Dec 2010 278.8
Cowra Airport Comparison 30.4 -0.9 41.5 26 Jan 2011 16.0 +1.2 7.6 22 Dec 2010 310.4 165.3 high 188%
Dubbo Airport AWS 31.3   42.6 26 Jan 2011 17.6   6.0 20 Dec 2010 214.0
Forbes Airport AWS 32.1   45.2 26 Jan 2011 17.0   6.7 20 Dec 2010 267.4
Parkes (Macarthur Street) 31.2 -0.3 42.0 26 Jan 2011 18.1 +0.8 6.2 20 Dec 2010 311.4 158.6 v high 196%
Parkes Airport AWS 30.4   41.9 26 Jan 2011 16.2   4.1 20 Dec 2010 383.0 188.5 v high 203%
Wellington (Agrowplow) 31.1 -1.1 41.8 26 Jan 2011 17.4 +1.2 5.5 21 Dec 2010 266.1 167.4 high 159%
Metropolitan (East) (district 66)
Bankstown Airport AWS 28.9 +1.2 41.6 1 Feb 2011 18.8 +1.2 12.4 20 Dec 2010 129.8 264.3 low 49%
Canterbury Racecourse AWS 28.2   41.0 1 Feb 2011 18.8   11.1 21 Dec 2010 119.4
Holsworthy Control Range 28.9   41.7 1 Feb 2011 17.6   9.2 21 Dec 2010 106.2
Parramatta North (Masons Drive) 28.8 +0.9 41.0 1 Feb 2011 18.2 +1.1 11.6 21 Dec 2010 161.0 299.4 low 54%
Riverview Observatory 27.9 +1.7 41.3 5 Feb 2011 19.0 +1.8 11.8 20 Dec 2010 153.2 301.1 low 51%
Sydney (Observatory Hill) 27.2 +1.6 41.5 5 Feb 2011 20.3 +2.0 13.3 20 Dec 2010 155.0 297.1 low 52%
Sydney Airport AMO 28.0 +1.8 42.2 5 Feb 2011 20.2 +1.8 13.3 20 Dec 2010 157.4 280.3 low 56%
Sydney Harbour (Wedding Cake West) 24.8   39.4 5 Feb 2011 20.2   13.5 20 Dec 2010
Sydney Olympic Park (Sydney Olympic Pk A 28.9   41.8 1 Feb 2011 19.8   13.1 20 Dec 2010 146.6
Terrey Hills AWS 26.7   40.3 1 Feb 2011 18.3   10.6 20 Dec 2010 193.2
Metropolitan (West) (district 67)
Badgerys Creek AWS 29.5   41.5 1 Feb 2011 17.3   10.6 22 Dec 2010 197.0
Horsley Park Equestrian Centre AWS 29.3   41.9 1 Feb 2011 17.9   9.8 20 Dec 2010 137.4
Penrith Lakes AWS     41.8 1 Feb 2011 19.0   12.1 20 Dec 2010 89.2
Prospect Reservoir 29.5 +1.6 41.3 1 Feb 2011 18.5 +1.3 12.0 20 Dec 2010 184.2 263.6 average 70%
Richmond RAAF 29.6   40.0 5 Feb 2011 18.2   11.2 21 Dec 2010
Illawarra (district 68)
Albion Park (Wollongong Airport) 26.8   40.0 5 Feb 2011 17.4   10.0 22 Dec 2010 219.8
Bellambi AWS 25.0   39.5 5 Feb 2011 18.9   12.4 20 Dec 2010 188.2
Bowral (Parry Drive) 24.2 -0.5 34.9 31 Jan 2011 14.5 +1.7 5.8 20 Dec 2010 354.6 258.0 high 137%
Camden Airport AWS 29.5 +0.6 41.3 1 Feb 2011 17.2 +1.0 8.8 21 Dec 2010
Campbelltown (Mount Annan) 29.3   40.6 5 Feb 2011 16.9   8.8 21 Dec 2010
Jervis Bay (Point Perpendicular AWS) 24.6   38.3 5 Feb 2011 18.3   12.4 20 Dec 2010 348.4
Kiama (Bombo Headland) 24.7   39.3 5 Feb 2011 18.8   12.5 20 Dec 2010 230.4
Nowra RAN Air Station AWS 26.7   40.5 1 Feb 2011 17.1   9.9 25 Dec 2010 304.0
South Coast (district 69)
Batemans Bay (Catalina Country Club) 25.6   41.2 1 Feb 2011 16.5   7.9 7 Feb 2011 314.8 273.3 high 115%
Bega AWS 25.5   41.6 1 Feb 2011 15.2   4.5 28 Dec 2010 303.2
Braidwood Racecourse AWS 24.9   37.1 31 Jan 2011 12.7   2.5 19 Dec 2010 223.6
Green Cape AWS 22.8   33.1 1 Feb 2011 16.8   10.4 28 Dec 2010 192.4
Merimbula Airport AWS 24.1   41.3 1 Feb 2011 15.7   7.8 7 Feb 2011 263.6
Montague Island Lighthouse 22.8 +0.1 35.5 1 Feb 2011 17.6 +0.6 10.9 20 Dec 2010 323.2 220.9 high 146%
Moruya Airport AWS 24.8   42.1 1 Feb 2011 16.4   8.8 19 Dec 2010 269.0
Moruya Heads Pilot Station 23.7 +0.2 40.2 1 Feb 2011 17.0 +1.3 10.2 7 Feb 2011 269.2 264.4 average 102%
Narooma Vmr 23.0 0.0 39.8 1 Feb 2011 16.8 +0.7 9.0 28 Dec 2010 412.5 257.3 v high 160%
Nerriga Composite 25.3 -0.1 37.8 26 Jan 2011 13.5 +1.5 5.0 19 Dec 2010 271.4 201.5 high 135%
Ulladulla AWS 23.9   40.0 1 Feb 2011 17.6   11.6 28 Dec 2010 273.8
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 24.3 -0.5 38.5 31 Jan 2011 12.1 +2.2 2.0 28 Dec 2010 233.0 186.8 high 125%
Bombala AWS 23.2   38.3 31 Jan 2011 11.3   0.7 28 Dec 2010 209.2
Canberra Airport 26.8   37.5 31 Jan 2011 13.8   4.7 19 Dec 2010 375.2
Cooma Airport AWS 24.1   35.3 31 Jan 2011 11.4   -0.5 28 Dec 2010 324.6 146.2 highest 222%
Cooma Visitors Centre 25.6 -0.6 38.0 31 Jan 2011 11.8 +1.8 0.7 28 Dec 2010 322.9 167.2 v high 193%
Goulburn Airport AWS 25.7   37.1 26 Jan 2011 13.5   4.0 22 Dec 2010 322.8
Goulburn TAFE 26.0 -0.6 37.9 26 Jan 2011 14.4 +1.5 5.5 20 Dec 2010 328.8 184.8 v high 178%
Mount Ginini AWS 17.9   28.0 31 Jan 2011 8.7   -1.3 20 Dec 2010 635.6
Taralga Post Office 25.3 +0.2 36.6 31 Jan 2011 12.7 +1.5 2.2 22 Dec 2010 252.4 206.0 average 123%
Tuggeranong (Isabella Plains) AWS 26.7   37.6 31 Jan 2011 14.6   5.4 19 Dec 2010 516.0
Yass (Linton Hostel) 28.2 -0.5 38.4 26 Jan 2011     5.4 22 Dec 2010 364.8 151.5 v high 241%
Southern Tablelands (Snowy Mountains) (district 71)
Charlotte Pass (Kosciusko Chalet)     26.0 31 Jan 2011 6.8 +2.3 -2.0 7 Feb 2011 678.0 424.3 v high 160%
Perisher Valley AWS 17.4   25.2 31 Jan 2011 7.3   -1.8 28 Dec 2010
Thredbo Village 20.5 0.0 30.5 31 Jan 2011 8.7 +2.3 -0.5 22 Dec 2010 810.0 324.3 highest 250%
Southwest Slopes (South) (district 72)
Albury Airport AWS 28.9   39.8 1 Feb 2011 16.5   8.6 20 Dec 2010 414.0
Cabramurra SMHEA AWS 19.0   28.5 31 Jan 2011 10.5   -0.6 20 Dec 2010 542.2
Hume Reservoir 28.7 -1.3 39.4 1 Feb 2011 17.0 +1.2 8.9 20 Dec 2010 429.4 138.7 highest 310%
Khancoban AWS 28.0   38.8 1 Feb 2011 13.8   5.7 28 Dec 2010 502.6
Tumbarumba Post Office 26.8 -0.9 36.6 31 Jan 2011 13.4 +2.2 5.0 22 Dec 2010 453.2 187.6 highest 242%
Wagga Wagga AMO 29.7 -0.9 40.7 1 Feb 2011 16.3 +0.9 7.8 20 Dec 2010 367.2 128.3 highest 286%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 28.3 -0.4 38.5 1 Feb 2011 16.6 +1.7 7.5 21 Dec 2010 445.1 179.4 v high 248%
Cootamundra Airport 29.3   39.0 26 Jan 2011 15.3   6.0 22 Dec 2010 352.4
Grenfell (Manganese Rd) 29.8 -1.1 40.5 26 Jan 2011 16.2 +0.5 7.0 20 Dec 2010 250.5 154.5 high 162%
Gundagai (William St) 29.6   40.0 1 Feb 2011 16.2   7.7 22 Dec 2010 367.1
Quandialla Post Office 31.4 -0.7 41.0 26 Jan 2011 17.3 +0.8 7.0 20 Dec 2010 308.4 136.4 v high 226%
Temora Airport 30.5   40.8 1 Feb 2011 16.1   6.7 20 Dec 2010 333.8
Wyalong Post Office 32.0 +0.2 42.0 26 Jan 2011 18.1 +1.3 8.3 20 Dec 2010 220.6 125.4 high 176%
Young Airport 29.0   38.0 1 Feb 2011 14.9   6.0 22 Dec 2010 384.6
Riverina (East) (district 74)
Corowa Airport 29.3 -1.8 40.4 31 Jan 2011 15.2 +0.2 6.4 28 Dec 2010 469.7 115.0 highest 408%
Deniliquin Airport AWS 29.9   41.2 31 Dec 2010 15.6   7.0 20 Dec 2010 204.2
Narrandera Airport 31.3   42.3 1 Feb 2011 17.0   8.1 28 Dec 2010 262.8 108.7 highest 242%
Narrandera Golf Club 30.5 -1.1 41.0 1 Feb 2011 16.8 +0.3 8.0 20 Dec 2010 279.5 115.1 highest 243%
Tocumwal Airport 29.4 -1.5 41.3 31 Jan 2011 16.2 +0.9 7.1 20 Dec 2010 325.8 95.6 highest 341%
Yanco Agricultural Institute 31.1   41.8 1 Feb 2011 17.7   8.4 20 Dec 2010 270.2
Riverina (West) (district 75)
Griffith Airport AWS 31.8 -0.2 42.5 1 Feb 2011 17.4 +0.9 8.1 20 Dec 2010 246.0 91.0 v high 270%
Hay (Miller Street) 30.8 -1.5 41.4 31 Dec 2010 17.0 +1.0 7.8 20 Dec 2010 365.2 84.0 highest 435%
Hay Airport AWS 31.4   42.1 31 Dec 2010 16.4   7.5 28 Dec 2010 339.6
Hillston Airport 32.7 +0.1 42.0 1 Jan 2011 17.6 -0.1 8.0 20 Dec 2010 148.4 87.7 high 169%
Lake Cargelligo Airport 32.2 -1.2 41.7 1 Jan 2011 17.7 -0.2 7.6 20 Dec 2010 249.5 112.5 v high 222%
Offshore Islands (district 200)
Lord Howe Island Aero 25.6 +0.6 28.8 21 Feb 2011 21.2 +1.0 15.5 22 Dec 2010 380.2 331.7 average 115%
Norfolk Island Aero 25.1 +0.8 28.2 28 Dec 2010 20.1 +1.3 15.1 11 Dec 2010 102.0 266.1 v low 38%

Notes

A Seasonal 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 Tuesday 1 March 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.

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