NSW in summer 2011-12: La Niña brings another wet summer to NSW

  • Coldest summer for NSW since 1983-4, 4th coldest mean temperatures on record
  • 2nd coldest mean maximum temperatures on record for NSW
  • 9th wettest summer on record for NSW, but drier than summer 2010-11

Rainfall

NSW recorded a statewide average rainfall of 261 mm during summer, well above the historical average of 171 mm. This is the 9th wettest summer on record for NSW, although drier than the summer of 2010-11 when 281.2 mm was recorded. The Murray Darling Basin also recorded 243.3 mm during summer, well above the historical average of 144.6 mm and the 6th wettest on record. Rainfall was above average across most of the state during the season, which was the wettest summer on record at Yarras in the northeast and Cooma in the south, while 31 stations had their wettest summer in at least 20 years. The sustained wet conditions during summer followed the wet end to spring, and were largely influenced by the La Niña event in the Pacific Ocean during the season.

Rainfall was above average throughout the season, with several significant rain and flooding events, particularly in the northeast. Early in December, a heavy rain event in northern NSW between the 6th and 8th exacerbated existing flooding following November rain, while an East Coast Low between the 16th and 18th of January brought daily falls as high as 105 mm at Boat Harbour (Rous River). This was followed by a very significant rain event across northern NSW between the 23rd and 29th of January, with large areas exceeding 100 mm for several consecutive days, reaching 290 mm at Meerschaumvale on the 26th. This triggered additional flooding along the north coast, particularly in the Tweed region, with tens of thousands of people isolated. Heavy rainfall continued in northern NSW between the 1st and 3rd of February, with continued flooding along the north coast as well as the northwest, including the isolation of Moree.

In southern NSW, a significant rain event developed towards the end of February, with daily totals as high as 123 mm in Coolamon on the 29th, its wettest day on record, with minor flooding along the Tumut and Murray rivers and parts of Cooma evacuated. By the end of February, National Disasters had been declared in 25 Local Government Areas, as a result of the flooding during the season.

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

Temperature

The statewide average temperature in NSW during summer was 23.1 °C, 1.1 °C below the historical average. This was the 4th coldest summer in NSW since records began in 1950, and the coldest since summer 1983-4 (23.0 °C). The cool temperatures, particularly during the day, were associated with above average rainfall and cloudiness during the season, which is typical for NSW during La Niña summers. Conditions were particularly cold during December, which was the 4th coldest on record for NSW; however, temperatures remained below average across the season, particularly in the northeast.

The average maximum temperature in NSW during summer was 29.51 °C, 1.71 °C below the historical average. This is the 2nd coldest summer for NSW since records began in 1950, and the coldest since NSW experienced temperatures 1.68 °C below average in 1983-4. The coldest summer ever recorded in NSW was in 1955/6, with a statewide average of 29.46 °C. Summer was particularly cool in northeastern NSW, with 30 stations experiencing their coldest summer on record, while an additional 16 stations experienced their coldest summer in at least 20 years. The coolest conditions during summer occurred in December, which was the 4th coldest on record for maximum temperatures in NSW and 2.5 °C below average, with large parts of northeastern NSW more than 4 °C below average.

NSW recorded a statewide average minimum temperature of 16.6 °C during summer, also below the historical average of 17.1 °C. This was the coldest summer for night-time temperatures since 1995-6, although only the 15th coldest on record, with the increased cloud cover moderating overnight temperatures. Most of the state recorded temperatures within 1 °C of average during the season, with slightly above average temperatures in southern NSW and coolest conditions in the north. Two notable cold snaps occurred during the season, with Katoomba, Taralga and Goulburn experiencing their coldest summer night on record on December 5, and Trangie breaking its record for minimum temperatures on January 12, with the latter event the subject of a Special Climate Statement.

Some sites had their lowest summer mean temperature on record. Some sites had their coldest summer day (lowest maximum temperature) on record. Some sites had their lowest summer mean daily maximum temperature on record. Some sites had their lowest summer temperature on record. Some sites had their lowest summer mean daily minimum temperature on record.

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

Other phenomena

Several severe thunderstorms impacted NSW during summer, with heavy hourly totals triggering several instances of flash flooding. These included in the central coast in December, with hourly totals as high as 65 mm at Gosford on the morning of the 12th, while flash flooding was reported in Broken Hill on January 27th. There were several flash flooding events across the state during February, including in Taree on the 8th, Picton on the 10th, and parts of Sydney overnight on the 10th and 20th.

Inland NSW was also impacted by flooding throughout the summer, as floodwaters from Queensland and northern NSW progressed through the Darling system. In particular, flooding on the Namoi and Barwon-Darling rivers resulted in the isolation of areas including Lightning Ridge, Collarenebri, Walgett, Wee Waa and Mungindi for much of February.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in summer 2011-12
Hottest day 42.8 °C at Wanaaring Post Office on 7 Jan 2012
Warmest days on average 34.0 °C at Tibooburra Post Office
Coolest days on average 14.4 °C at Thredbo AWS
Coldest day 1.3 °C at Thredbo AWS on 11 Jan 2012
Coldest night -4.3 °C at Thredbo AWS on 5 Dec 2011
Coolest nights on average 4.8 °C at Perisher Valley AWS
Warmest nights on average 21.0 °C at Tibooburra Post Office
Warmest night 29.6 °C at Bourke Airport AWS on 8 Jan 2012
Warmest on average overall 27.5 °C at Tibooburra Post Office
Coolest on average overall 9.7 °C at Thredbo AWS
Wettest overall 1525.8 mm at Yarras (Mount Seaview)
Wettest day 290.0 mm at Meerschaumvale (Meerschaum Vale (Barden) on 26 Jan 2012
Highest wind gust 109 km/h at Griffith Airport AWS on 22 Feb 2012

Record highest summer daily rainfall
Highest daily rainfall
in summer 2011-12 (mm)
Previous wettest
for summer
Years of
record
Louth (Bloxham Street) 107.4 on 25 Jan 2012 106.7 on 10 Feb 1896 132
Coolamon Post Office 123.0 on 29 Feb 2012 109.4 on 11 Jan 1974 127
Grong Grong (Junee St) 110.6 on 29 Feb 2012 78.4 on 11 Jan 1974 114
Mulwala Post Office 94.0 on 28 Feb 2012 87.0 on 20 Jan 1995 108
Binalong Post Office 102.1 on 29 Feb 2012 86.9 on 30 Jan 1954 107
Booroorban (Ramsay) 94.6 on 19 Dec 2011 86.1 on 7 Dec 1930 88
Broken Hill Airport AWS 82.4 on 29 Feb 2012 75.2 on 1 Jan 1961 56
Coleambally Irrigation 85.6 on 19 Dec 2011 78.0 on 27 Jan 2001 35
Tamworth Airport AWS 121.0 on 2 Feb 2012 105.0 on 17 Jan 2004 20



Record highest total summer rainfall
Total rainfall
for summer 2011-12 (mm)
Previous wettest
for summer
Years of
record
Average for
summer
Yarras (Mount Seaview) 1525.8 1361.6 in 2007 59 663.5
Cooma Visitors Centre 424.0 335.4 in 1991 39 173.9
Cooma Airport AWS 343.4 324.6 in 2010 25 154.1



Record lowest summer daily maximum temperature
Lowest daily maximum
temperature
in summer 2011-12 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Mungindi Post Office 18.1 on 6 Dec 2011 19.0 on 10 Feb 1976 47 34.6
Tabulam (Muirne) 13.4 on 6 Dec 2011 14.1 on 1 Dec 1986 42 26.6
Murwillumbah (Bray Park) 19.2 on 7 Dec 2011 19.9 on 15 Dec 1981 38 29.2



Record lowest summer mean daily maximum temperature
Mean daily maximum
temperature
for summer 2011-12 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Coonabarabran (Namoi Street) 26.9 27.6 in 1947 131 31.0
Wellington (Agrowplow) 28.3 28.9 in 1971 90 32.2
Collarenebri (Albert St) 30.6 30.7 in 1975 87 34.9
Murrurundi Post Office 26.1 26.3 in 2007 85 30.1
Brewarrina Hospital 31.1 31.3 in 2007 84 35.5
Gunnedah Resource Centre 28.2 28.5 in 1955 58 31.3
Condobolin Ag Research Stn 30.0 30.2 in 1983 44 32.8
Barraba Post Office 28.2 28.3 in 1970 43 31.1
Peak Hill Post Office 28.9 29.5 in 1971 43 32.3
Parramatta North (Masons Drive) 25.2 25.8 in 1995 42 27.9
Bowral (Parry Drive) 21.5 = 21.5 in 1995 41 24.7
Yarras (Mount Seaview) 26.4 = 26.4 in 2007 41 28.6
Cooma Visitors Centre 24.0 = 24.0 in 1991 36 26.2
Gulgong Post Office 26.8 27.1 in 1971 36 30.1
Woolbrook (Danglemah Road) 23.6 24.3 in 1983 36 26.9
Camden Airport AWS 26.1 26.6 in 1983 35 28.9
Oberon (Springbank) 21.0 21.1 in 1955 35 23.9
Orange Agricultural Institute 22.4 22.8 in 1991 34 25.6
Paterson (Tocal AWS) 26.6 26.9 in 1995 32 29.2
Cessnock (Nulkaba) 26.9 27.4 in 2007 31 29.8
Gosford (Narara Research Station) AWS 24.9 25.6 in 2007 29 27.3
Peats Ridge (Waratah Road) 23.6 24.3 in 1995 29 26.5
Guyra Hospital 21.0 = 21.0 in 1983 22 23.3
Bathurst Airport AWS 24.4 24.9 in 1991 20 27.3
Cessnock Airport AWS 26.4 26.5 in 2007 20 29.4
Goulburn Airport AWS 23.8 = 23.8 in 1995 20 26.6
Mount Boyce AWS 20.1 = 20.1 in 1995 20 22.9
Mudgee Airport AWS 26.2 26.9 in 1995 20 29.4
Nullo Mountain AWS 19.7 20.1 in 2007 20 22.9
Young Airport 27.8 = 27.8 in 1991 20 30.3

 




Record lowest summer temperature
Lowest temperature
in summer 2011-12 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Taralga Post Office -0.2 on 5 Dec 2011 0.0 on 7 Dec 2002 54 11.2
Katoomba (Murri St) 2.4 on 5 Dec 2011 3.0 on 13 Dec 1995 50 12.4
Trangie Research Station AWS 6.2 on 12 Jan 2012 = 6.2 on 20 Dec 2010 44 17.8
Goulburn Airport AWS -0.6 on 5 Dec 2011 0.6 on 7 Dec 2002 21 12.0



Record lowest summer mean daily minimum temperature
Mean daily minimum
temperature
for summer 2011-12 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Braidwood Racecourse AWS 10.0 10.1 in 1999 20 11.6
Nullo Mountain AWS 11.1 11.5 in 1999 20 12.8

 




Record lowest summer mean temperature
Mean daily
temperature
for summer 2011-12 (°C)
Previous coolest
for summer
Years of
record
Average for
summer
Jerrys Plains Post Office 21.9 22.0 in 1971 103 24.0
Wellington (Agrowplow) 21.8 22.0 in 1971 90 24.2
Grenfell (Manganese Rd) 20.8 20.9 in 1924 89 23.3
Collarenebri (Albert St) 24.5 24.8 in 1983 87 27.4
Brewarrina Hospital 25.0 25.3 in 2007 83 27.7
Inverell Research Centre 20.6 = 20.6 in 1971 50 22.4
Barraba Post Office 21.2 21.6 in 1983 43 23.4
Parramatta North (Masons Drive) 20.8 20.9 in 1995 42 22.5
Peak Hill Post Office 23.2 23.4 in 1991 42 25.5
Woolbrook (Danglemah Road) 17.6 17.7 in 1971 36 19.4
Camden Airport AWS 20.7 21.1 in 1983 35 22.6
Orange Agricultural Institute 17.0 17.1 in 1991 34 19.1
Paterson (Tocal AWS) 21.5 = 21.5 in 1971 32 23.2
Cessnock (Nulkaba) 21.6 22.0 in 1995 31 23.5
Gosford (Narara Research Station) AWS 20.4 20.7 in 1999 29 21.9
Peats Ridge (Waratah Road) 19.4 19.7 in 1995 29 21.1
Bathurst Airport AWS 18.2 = 18.2 in 1995 20 20.1
Braidwood Racecourse AWS 16.3 = 16.3 in 1995 20 18.6
Goulburn Airport AWS 17.4 = 17.4 in 1995 20 19.3
Mudgee Airport AWS 20.3 = 20.3 in 1999 20 22.1
Nullo Mountain AWS 15.4 16.0 in 1995 20 17.9


Summary statistics for summer 2011-12
Maximum temperatures
for summer
(°C)
Minimum temperatures
for summer
(°C)
Rainfall
for summer
(millimetres)
Mean for
summer
2011-12
Diff
from
average
Highest for
summer
2011-12
Mean for
summer
2011-12
Diff
from
average
Lowest for
summer
2011-12
Total for
summer
2011-12
Average
for
summer
Rank of
summer
2011-12
Fraction of
summer
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 33.2   42.0 19 Jan 2012 19.6   13.0 1 Dec 2011 151.8
Tibooburra Airport 33.9   42.3 19 Feb 2012 20.5   15.1 7 Dec 2011 126.6
Tibooburra Post Office 34.0 -1.4 42.2 19 Feb 2012 21.0 -0.3 14.6 7 Feb 2012 117.2 80.4 high 146%
White Cliffs AWS 33.4   41.5 7 Jan 2012 20.1   13.4 11 Feb 2012 174.6
Wilcannia (Reid St) 33.3 -1.4 41.9 19 Jan 2012 18.8 -0.3 10.7 3 Dec 2011 151.6 78.5 high 193%
Wilcannia Aerodrome AWS 33.7   42.2 19 Jan 2012 18.2   10.1 3 Dec 2011 104.8
Western (Lower Darling) (district 47)
Broken Hill (Patton Street)     39.9 2 Jan 2012 17.9 -0.1 10.0 1 Dec 2011 251.2 73.2 v high 343%
Broken Hill Airport AWS 31.2 -0.9 39.4 2 Jan 2012 17.3 -0.9 9.9 1 Dec 2011 249.6 73.9 v high 338%
Lake Victoria Storage 31.3 0.0 40.4 2 Jan 2012 16.3 +0.2 8.2 1 Dec 2011 83.1 59.9 high 139%
Menindee Post Office 32.9 -0.7 42.0 3 Jan 2012 18.8 +1.0 11.8 14 Jan 2012 78.5 67.9 high 116%
Pooncarie Mail Agency 33.1   42.0 2 Jan 2012 18.0   10.8 5 Dec 2011 154.3 67.7 v high 228%
Western (Upper Darling) (district 48)
Bourke Airport AWS 32.4   41.7 8 Jan 2012     12.3 2 Dec 2011 263.2
Brewarrina Hospital 31.1 -4.4 41.8 8 Jan 2012 18.8 -1.2 11.8 2 Dec 2011 324.0 139.7 v high 232%
Cobar Airport AWS 31.3   40.0 19 Jan 2012 18.0   9.3 1 Dec 2011 190.8
Cobar MO 31.0 -2.3 40.1 8 Jan 2012 18.3 -1.5 11.1 1 Dec 2011 201.8 128.9 high 157%
Collarenebri (Albert St) 30.6 -4.3 38.2 8 Jan 2012 18.7 -1.2 13.8 13 Jan 2012 229.4 178.9 average 128%
Lightning Ridge Visitors Information Cen 31.3   39.5 8 Jan 2012 19.2   13.0 15 Jan 2012 411.3
Wanaaring Post Office 33.5   42.8 7 Jan 2012 20.1   12.1 1 Dec 2011 145.6 100.1 high 145%
Western (Southwest Plains) (district 49)
Ivanhoe Aerodrome AWS 32.8   41.4 3 Jan 2012 17.9   9.3 12 Jan 2012 134.2
Ivanhoe Post Office 33.5 -0.6 42.5 3 Jan 2012 17.2 -0.2 8.0 12 Jan 2012 185.6 84.0 v high 221%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 30.0 -2.8 39.3 19 Jan 2012 16.3 -1.1 7.8 1 Dec 2011 265.5 134.6 high 197%
Condobolin Airport AWS 30.2   38.7 19 Jan 2012 16.3   7.8 1 Dec 2011 221.8
Peak Hill Post Office 28.9 -3.4 36.2 19 Jan 2012 17.7 -0.9 9.4 12 Jan 2012 222.3 161.2 high 138%
West Wyalong Airport AWS 29.8   38.1 3 Jan 2012 15.2   8.9 12 Jan 2012 149.0
Central Western Plains (North) (district 51)
Coonamble Airport AWS 29.7   39.0 8 Jan 2012 17.0   10.3 12 Jan 2012 440.8
Nyngan Airport 30.3 -3.2 39.4 8 Jan 2012 17.3 -1.5 11.9 12 Jan 2012 298.8 142.9 v high 209%
Trangie Research Station AWS 29.7 -2.7 38.8 4 Jan 2012 16.4 -1.4 6.2 12 Jan 2012 199.0 148.1 high 134%
Northwest Plains (West) (district 52)
Mungindi Post Office 31.1 -3.5 39.1 8 Jan 2012 19.0 -0.9 11.2 13 Jan 2012 406.7 188.1 v high 216%
Walgett Airport AWS 30.6   39.9 8 Jan 2012 18.1   10.0 13 Jan 2012 399.4
Northwest Plains (East) (district 53)
Moree Aero 29.6   36.4 8 Jan 2012 18.1   11.7 12 Jan 2012 461.8
Northwest Slopes (North) (district 54)
Barraba Post Office 28.2 -2.9 34.5 4 Jan 2012 14.1 -1.6 7.0 12 Jan 2012 443.7 243.8 v high 182%
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 29.1   35.5 4 Jan 2012 15.8   6.1 12 Jan 2012 373.6
Gunnedah Resource Centre 28.2 -3.1 34.4 8 Jan 2012 17.1 -1.3 11.3 3 Dec 2011 327.6 231.0 high 142%
Quirindi Post Office 28.9 -2.7 36.0 8 Jan 2012 14.8 -1.0 7.8 3 Dec 2011 240.6 227.5 average 106%
Tamworth Airport AWS 28.2   34.5 8 Jan 2012 15.0   7.6 12 Jan 2012 435.0
Woolbrook (Danglemah Road) 23.6 -3.3 29.5 6 Feb 2012 11.6 -0.3 3.5 12 Jan 2012 370.8 275.7 high 134%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 22.9   29.4 8 Jan 2012 11.8   3.8 12 Jan 2012 285.0
Armidale Airport AWS 22.2   28.7 8 Jan 2012 11.9   4.5 12 Jan 2012 268.4
Glen Innes Ag Research Stn 22.9 -1.9 28.7 6 Feb 2012 12.1 -0.9 6.0 2 Dec 2011 296.5 310.4 average 96%
Glen Innes Airport AWS 23.1   28.8 9 Jan 2012 11.7   2.5 12 Jan 2012 307.8
Glen Innes Post Office 23.6 -2.3 30.0 6 Feb 2012 13.0 +0.1 6.8 12 Jan 2012 292.4 312.6 average 94%
Guyra Hospital 21.0 -2.3 27.0 8 Jan 2012 10.6 -0.9 4.2 12 Jan 2012 351.5 341.7 average 103%
Inverell (Raglan St) 27.2   32.6 19 Jan 2012 14.1   7.5 2 Dec 2011 325.0
Inverell Research Centre 26.4 -2.4 31.6 19 Jan 2012 14.9 -1.0 9.5 3 Dec 2011 335.8 296.9 average 113%
Tenterfield (Federation Park) 23.9 -2.7 31.9 9 Jan 2012 13.2 -0.7 5.9 12 Jan 2012 393.5 315.0 high 125%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 24.7 -1.9 34.9 9 Jan 2012 16.0 -0.7 10.8 6 Dec 2011 776.6 520.3 high 149%
Upper North Coast (district 58)
Ballina Airport AWS 26.7   33.1 9 Jan 2012 18.9   11.7 4 Dec 2011 745.4
Byron Bay (Cape Byron AWS) 26.1   34.0 11 Jan 2012 19.7   14.5 7 Dec 2011 488.0
Casino Airport 28.4 -2.6 38.0 9 Jan 2012 18.3 -0.2 12.8 8 Dec 2011 538.2 411.3 high 131%
Casino Airport AWS 28.1   37.4 9 Jan 2012 18.4   12.7 18 Dec 2011 524.4
Evans Head RAAF Bombing Range AWS 26.5   36.0 9 Jan 2012 18.8   13.8 6 Dec 2011 665.6
Grafton Airport AWS 27.7   34.9 11 Jan 2012 17.7   11.2 3 Dec 2011 605.2
Grafton Olympic Pool 28.0 -1.7 35.2 11 Jan 2012 18.8 -0.5 13.4 18 Dec 2011 702.5 411.2 v high 171%
Grafton Research Stn 27.5   34.9 11 Jan 2012 18.3   13.9 17 Dec 2011 653.4 363.4 v high 180%
Lismore (Richmond Hill) 27.4   36.4 9 Jan 2012 18.2   13.0 4 Dec 2011 531.2
Lismore Airport AWS 27.7   37.5 9 Jan 2012 17.7   12.0 18 Dec 2011 450.0
Murwillumbah (Bray Park) 27.7 -1.5 35.4 9 Jan 2012 18.9 -0.3 14.5 4 Dec 2011 966.9 610.9 high 158%
Yamba Pilot Station 25.9 -0.5 34.2 11 Jan 2012 19.7 -0.2 14.4 6 Dec 2011 538.0 415.6 high 129%
Lower North Coast (district 59)
Coffs Harbour MO 26.0 -0.7 31.8 11 Jan 2012 18.5 -0.5 13.1 7 Dec 2011 849.8 552.9 v high 154%
Dorrigo (Old Coramba Rd) 21.7   29.0 29 Feb 2012 13.8   8.8 7 Dec 2011 1309.1
Kempsey (Wide Street) 27.4 -1.5 33.0 29 Feb 2012 17.5 +0.1 12.8 3 Dec 2011 638.7 401.1 v high 159%
Kempsey Airport AWS 27.0   33.9 20 Feb 2012 16.7   10.9 4 Dec 2011 606.4
South West Rocks (Smoky Cape Lighthouse) 26.7 +0.2 30.7 11 Jan 2012     12.8 6 Dec 2011 371.0 437.9 average 85%
Manning (district 60)
Forster - Tuncurry Marine Rescue 25.3   30.0 11 Jan 2012 18.1   10.0 3 Dec 2011 499.8 320.1 v high 156%
Port Macquarie Airport AWS 26.1   32.2 9 Jan 2012 17.4   11.6 16 Dec 2011 651.6
Taree Airport AWS 26.0   32.1 28 Feb 2012 17.1   11.0 4 Dec 2011 570.4
Yarras (Mount Seaview) 26.4 -2.2 33.2 6 Feb 2012 16.9 0.0 10.8 12 Jan 2012 1525.8 663.5 highest 230%
Hunter (district 61)
Cessnock (Nulkaba) 26.9 -2.9 37.1 4 Jan 2012 16.3 -0.9 7.9 3 Dec 2011 321.7 264.1 high 122%
Cessnock Airport AWS 26.4 -3.0 36.6 4 Jan 2012 15.6 -0.5 7.6 3 Dec 2011 292.8 250.9 average 117%
Cooranbong (Lake Macquarie AWS) 25.4   36.6 4 Jan 2012 15.9   8.4 3 Dec 2011 416.2
Gosford (Narara Research Station) AWS 24.9 -2.4 35.6 4 Jan 2012 15.9 -0.6 9.1 3 Dec 2011 621.0 392.2 high 158%
Jerrys Plains Post Office 27.7 -3.6 38.2 4 Jan 2012 16.0 -0.6 6.9 3 Dec 2011 201.4 219.2 average 92%
Maitland Visitors Centre 26.6   37.3 4 Jan 2012 16.3   9.0 3 Dec 2011 311.4
Mangrove Mountain AWS 24.3   35.6 4 Jan 2012 15.2   8.1 3 Dec 2011 452.4
Merriwa (Roscommon) 26.8   34.6 4 Jan 2012 13.8   4.5 3 Dec 2011 197.6 208.1 average 95%
Murrurundi Gap AWS 23.4   31.3 4 Jan 2012 13.5   6.4 3 Dec 2011 277.4
Murrurundi Post Office 26.1 -4.0 33.9 8 Jan 2012 13.5 -1.1 4.4 3 Dec 2011 251.0 258.0 average 97%
Nelson Bay (Nelson Head) 25.2 -1.6 29.3 11 Jan 2012 19.0 +0.9 14.4 3 Dec 2011 400.0 306.5 high 131%
Newcastle Nobbys Signal Station AWS 23.6 -1.7 31.8 4 Jan 2012 18.9 0.0 13.0 3 Dec 2011 289.0 275.7 average 105%
Newcastle University 25.9   36.1 4 Jan 2012 17.6   10.4 3 Dec 2011 374.9
Norah Head AWS 24.4   30.0 11 Jan 2012 18.6   12.4 5 Dec 2011 429.6
Paterson (Tocal AWS) 26.6 -2.6 37.8 4 Jan 2012 16.4 -0.7 9.3 3 Dec 2011 343.2 304.0 average 113%
Peats Ridge (Waratah Road) 23.6 -2.9 35.0 4 Jan 2012 15.2 -0.6 8.5 3 Dec 2011 438.2 371.7 high 118%
Scone Airport AWS 27.7 -2.8 36.6 4 Jan 2012 14.8 -1.4 6.4 3 Dec 2011 223.6
Singleton STP 27.1   37.3 4 Jan 2012     8.5 12 Jan 2012 283.9
Williamtown RAAF 26.1 -1.5 37.3 4 Jan 2012 17.0 -0.5 10.2 3 Dec 2011 302.6 297.6 average 102%
Central Tablelands (North) (district 62)
Gulgong Post Office 26.8 -3.3 34.1 3 Jan 2012 14.7 -1.3 7.5 12 Jan 2012 333.1 200.2 v high 166%
Mudgee Airport AWS 26.2 -3.2 33.7 4 Jan 2012 14.3 -0.6 4.9 12 Jan 2012 300.2
Nullo Mountain AWS 19.7 -3.2 27.6 3 Jan 2012 11.1 -1.7 3.0 5 Dec 2011 379.2
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 24.4 -2.8 32.0 3 Jan 2012 12.0 -0.8 2.1 12 Jan 2012 327.5 193.6 v high 169%
Bathurst Airport AWS 24.4 -2.9 32.1 3 Jan 2012 12.0 -0.8 2.6 12 Jan 2012 321.6
Katoomba (Murri St) 20.1 -2.6 29.7 3 Jan 2012 11.8 -0.6 2.4 5 Dec 2011 667.4 457.9 high 146%
Lithgow (Cooerwull) 21.2   30.0 3 Jan 2012 11.6   1.3 3 Dec 2011 306.2 239.1 high 128%
Mount Boyce AWS 20.1 -2.8 29.4 3 Jan 2012 11.3 -1.3 2.4 5 Dec 2011 527.4
Oberon (Springbank) 21.0 -2.9 29.7 3 Jan 2012 9.7 -0.6 -0.5 12 Jan 2012 281.3 216.2 high 130%
Orange Agricultural Institute 22.4 -3.2 29.3 3 Jan 2012 11.5 -1.1 4.0 2 Dec 2011 308.2 251.7 high 122%
Orange Airport AWS 22.1   29.5 3 Jan 2012 10.6   2.8 12 Jan 2012 327.2
Springwood (Valley Heights) 24.2   36.3 4 Jan 2012 15.3   8.3 5 Dec 2011 492.2 367.8 high 134%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 26.9 -4.1 33.4 8 Jan 2012 13.2 -1.1 5.5 3 Dec 2011 377.6 244.8 high 154%
Coonabarabran Airport AWS 25.7   32.4 8 Jan 2012 14.7   6.7 5 Dec 2011 476.8
Dunedoo Post Office 27.9 -3.2 35.7 3 Jan 2012 15.8 -0.5 6.9 12 Jan 2012 208.9 197.6 average 106%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 28.2   35.1 3 Jan 2012 14.3   2.3 12 Jan 2012 320.2
Dubbo Airport AWS 28.6   37.3 4 Jan 2012 15.5   5.8 12 Jan 2012 290.8
Forbes Airport AWS 29.2   37.6 19 Jan 2012 15.2   7.5 12 Jan 2012 326.2
Parkes (Macarthur Street) 28.9 -2.6 36.0 3 Jan 2012 16.2 -1.1 6.8 12 Jan 2012 269.9 159.6 high 169%
Parkes Airport AWS 28.5   35.5 3 Jan 2012 15.3   5.4 12 Jan 2012 268.6 191.8 high 140%
Wellington (Agrowplow) 28.3 -3.9 35.9 3 Jan 2012 15.4 -0.8 6.6 12 Jan 2012 253.3 168.0 high 151%
Metropolitan (East) (district 66)
Bankstown Airport AWS 26.0 -1.8 36.2 4 Jan 2012 16.8 -0.8 9.7 7 Dec 2011 359.4 266.5 high 135%
Canterbury Racecourse AWS 24.8   35.6 4 Jan 2012 16.8   8.6 7 Dec 2011 392.6
Holsworthy Control Range 25.5   35.4 4 Jan 2012 15.7   7.9 7 Dec 2011 331.8
Parramatta North (Masons Drive) 25.2 -2.7 36.1 4 Jan 2012 16.3 -0.8 9.5 3 Dec 2011 466.6 304.3 high 153%
Riverview Observatory 24.7 -1.5 33.2 4 Jan 2012 17.0 -0.2 10.0 7 Dec 2011 504.1 303.3 v high 166%
Sydney (Observatory Hill) 25.0 -0.6 33.4 28 Feb 2012 18.5 +0.2 11.8 5 Dec 2011 328.2 297.3 average 110%
Sydney Airport AMO 25.2 -1.0 34.6 30 Jan 2012 18.6 +0.2 12.0 5 Dec 2011 357.6 281.2 high 127%
Sydney Harbour (Wedding Cake West) 22.7   31.1 28 Feb 2012 18.9   12.1 5 Dec 2011
Sydney Olympic Park AWS (Archery Centre) 25.3   36.8 4 Jan 2012 17.4   10.2 7 Dec 2011 431.8
Terrey Hills AWS 23.4   31.8 4 Jan 2012 16.6   9.5 5 Dec 2011 543.0
Metropolitan (West) (district 67)
Badgerys Creek AWS 26.0   35.0 4 Jan 2012 15.7   8.7 5 Dec 2011 412.6
Horsley Park Equestrian Centre AWS 25.6   35.2 4 Jan 2012 16.1   9.9 5 Dec 2011 429.6
Penrith Lakes AWS 26.9   37.3 4 Jan 2012 16.8   10.2 3 Dec 2011 492.4
Prospect Reservoir 25.8 -2.1 34.9 4 Jan 2012 16.6 -0.6 10.5 3 Dec 2011 435.8 265.0 high 164%
Richmond RAAF 26.1   36.2 4 Jan 2012 16.4   8.6 12 Jan 2012 379.2
Illawarra (district 68)
Albion Park (Wollongong Airport) 24.3   34.3 30 Jan 2012 15.6   7.9 3 Dec 2011 283.6
Bellambi AWS 22.8   30.9 30 Jan 2012 17.5   10.8 5 Dec 2011 530.6
Bowral (Parry Drive) 21.5 -3.2 32.0 4 Jan 2012 12.0 -0.8 3.1 5 Dec 2011 395.2 260.9 high 151%
Camden Airport AWS 26.1 -2.8 36.4 4 Jan 2012 15.4 -0.9 7.4 7 Dec 2011 292.4 240.4 high 122%
Campbelltown (Mount Annan) 25.9   34.8 4 Jan 2012 15.2   7.6 5 Dec 2011 268.4
Jervis Bay (Point Perpendicular AWS) 22.6   30.9 4 Jan 2012 17.1   10.5 5 Dec 2011 363.2
Kiama (Bombo Headland) 22.8   33.6 30 Jan 2012 17.3   11.7 5 Dec 2011 400.8
Moss Vale AWS 21.3   31.5 4 Jan 2012 11.9   2.5 7 Dec 2011 357.6
Nowra RAN Air Station AWS 24.4   36.2 4 Jan 2012 14.9   8.9 3 Dec 2011 316.2
South Coast (district 69)
Batemans Bay (Catalina Country Club) 24.0   34.7 30 Jan 2012 14.4   6.6 12 Jan 2012 244.9 271.7 average 90%
Bega AWS 25.3   37.1 30 Jan 2012 13.7   5.8 3 Dec 2011 149.2
Braidwood Racecourse AWS 22.5 -3.0 31.2 2 Jan 2012 10.0 -1.6 0.0 5 Dec 2011 228.2
Green Cape AWS 22.5   27.2 23 Feb 2012 16.3   10.2 3 Dec 2011 196.2
Merimbula Airport AWS 23.5   33.5 30 Jan 2012 14.2   6.5 3 Dec 2011 267.4
Montague Island Lighthouse 21.8 -0.9 28.8 30 Jan 2012 16.8 -0.2 9.5 12 Jan 2012 235.8 221.1 average 107%
Moruya Airport AWS 23.4   35.1 30 Jan 2012 14.6   7.5 12 Jan 2012 176.4
Moruya Heads Pilot Station 22.5 -1.0 34.0 30 Jan 2012 15.6 -0.1 9.4 1 Dec 2011 179.4 263.8 average 68%
Narooma (Marine Rescue) 22.2 -0.8 32.5 30 Jan 2012 15.6 -0.5 10.0 3 Dec 2011 211.5 256.8 average 82%
Ulladulla AWS 22.4 -1.4 33.1 30 Jan 2012 16.2 -0.6 9.9 5 Dec 2011 247.0
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 23.7 -1.1 34.7 3 Jan 2012 9.8 -0.1 1.4 3 Dec 2011 189.2 186.9 average 101%
Bombala AWS 22.6 -1.5 34.5 3 Jan 2012 9.0 -1.1 0.5 3 Dec 2011 203.2
Canberra Airport 25.4   34.7 3 Jan 2012 12.0   1.6 12 Jan 2012 237.8
Cooma Airport AWS 22.6 -2.6 32.2 3 Jan 2012 9.1 -0.8 -1.0 6 Dec 2011 343.4 154.1 highest 223%
Cooma Visitors Centre 24.0 -2.2 34.3 3 Jan 2012 9.7 -0.3 0.1 6 Dec 2011 424.0 173.9 highest 244%
Goulburn Airport AWS 23.8 -2.8 34.3 3 Jan 2012 10.9 -1.1 -0.6 5 Dec 2011 263.0
Goulburn TAFE 23.9 -2.7 34.6 3 Jan 2012 12.1 -0.9 2.1 5 Dec 2011 259.2 186.8 high 139%
Mount Ginini AWS 16.3   25.0 3 Jan 2012 7.2   -3.0 5 Dec 2011 513.8
Taralga Post Office 22.6 -2.5 33.2 3 Jan 2012 10.7 -0.5 -0.2 5 Dec 2011 334.3 207.0 v high 161%
Tuggeranong (Isabella Plains) AWS 25.0   33.9 3 Jan 2012 12.5   3.8 12 Jan 2012 371.8
Southern Tablelands (Snowy Mountains) (district 71)
Perisher Valley AWS 16.7   24.4 25 Feb 2012 4.8   -4.2 6 Dec 2011 420.2
Thredbo AWS 14.4 -1.0 21.4 25 Feb 2012 5.1 -1.1 -4.3 5 Dec 2011 385.8 301.9 high 128%
Thredbo Village 19.6 -0.9 26.5 25 Feb 2012 6.5 +0.1 -1.0 1 Dec 2011 415.1 314.4 high 132%
Southwest Slopes (South) (district 72)
Albury Airport AWS 29.5   38.9 3 Jan 2012 15.1   6.2 12 Jan 2012 142.0
Cabramurra SMHEA AWS 18.2   25.5 29 Jan 2012 9.3   -0.9 5 Dec 2011 293.0
Hume Reservoir 29.4 -0.6 37.7 3 Jan 2012 16.0 +0.2 7.0 12 Jan 2012 199.6 139.4 high 143%
Khancoban AWS 27.8   35.5 26 Jan 2012 12.0   2.4 5 Dec 2011 260.8
Tumbarumba Post Office 26.2 -1.5 33.6 3 Jan 2012 11.1 -0.1 2.4 12 Jan 2012 277.7 188.3 high 147%
Wagga Wagga AMO 29.0 -1.6 36.9 3 Jan 2012 15.1 -0.3 4.4 12 Jan 2012 191.4 129.1 high 148%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 27.8 -0.9 36.2 19 Jan 2012 15.0 +0.1 5.9 12 Jan 2012 222.2 180.3 high 123%
Cootamundra Airport 27.9   36.0 3 Jan 2012 13.9   2.0 12 Jan 2012 323.0
Grenfell (Manganese Rd) 27.4 -3.5 34.7 3 Jan 2012 14.2 -1.5 6.2 1 Dec 2011 396.1 156.4 v high 253%
Gundagai (William St) 28.7   37.0 3 Jan 2012 14.4   4.9 5 Dec 2011 220.6
Quandialla Post Office 29.5 -2.6 37.5 3 Jan 2012 15.8 -0.7 7.0 12 Jan 2012 285.5 138.2 v high 207%
Temora Airport 29.0   37.4 19 Jan 2012 14.6   6.0 12 Jan 2012 185.2
Wyalong Post Office 29.7 -2.1 38.1 3 Jan 2012 16.1 -0.7 8.7 12 Jan 2012 237.2 126.5 v high 188%
Young Airport 27.8 -2.5 35.3 19 Jan 2012 12.9 -0.8 2.2 12 Jan 2012 269.4
Riverina (East) (district 74)
Corowa Airport 30.0 -1.1 40.2 3 Jan 2012 15.2 +0.2 7.0 1 Dec 2011 196.8 115.7 high 170%
Deniliquin Airport AWS 30.7   41.7 3 Jan 2012 15.4   6.6 12 Jan 2012 109.2
Narrandera Airport 31.1   40.4 3 Jan 2012 16.0   7.1 2 Dec 2011 182.2 110.4 high 165%
Narrandera Golf Club 31.0 -0.6 40.8 3 Jan 2012 14.8 -1.7 5.0 2 Dec 2011 154.5 116.0 high 133%
Tocumwal Airport 30.1 -0.8 40.7 3 Jan 2012 15.6 +0.3 6.7 5 Dec 2011 190.2 96.4 v high 197%
Yanco Agricultural Institute 31.3   40.5 3 Jan 2012 16.7   8.8 2 Dec 2011 169.2 93.8 high 180%
Riverina (West) (district 75)
Griffith Airport AWS 31.1 -0.9 40.7 3 Jan 2012 16.6 +0.1 6.5 2 Dec 2011 126.4 91.8 high 138%
Hay (Miller Street) 31.7 -0.6 41.3 3 Jan 2012 16.3 +0.3 7.3 5 Dec 2011 125.7 84.3 high 149%
Hay Airport AWS 32.4   42.1 3 Jan 2012 15.7   6.7 1 Dec 2011 121.4
Hillston Airport 31.5 -1.1 40.0 3 Jan 2012 17.2 -0.5 10.0 1 Dec 2011 252.0 89.0 v high 283%
Lake Cargelligo Airport 30.9 -2.5 40.1 3 Jan 2012     8.6 2 Dec 2011 217.2 113.3 high 192%
Offshore Islands (district 200)
Lord Howe Island Aero 24.0 -1.0 26.8 29 Feb 2012 19.6 -0.6 13.1 14 Jan 2012 584.2 342.7 high 170%
Norfolk Island Aero 24.2 -0.1 27.0 23 Feb 2012 19.5 +0.7 15.5 10 Jan 2012 514.0 268.2 v high 192%

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 11 am on Thursday 1 March 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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