NSW in December 2011: 4th coldest December on record

  • 4th coldest mean temperatures on record for December
  • 3rd coldest maximum temperatures on record
  • Below average minimum temperatures
  • Above average rainfall

Rainfall

NSW recorded a statewide average of 65.6 mm during December, above the historical average of 54.2 mm for the 3rd consecutive wet December. Rainfall was generally average to above average across the state, with very much above average totals along the Queensland border, with only patchy below average areas along the tablelands and isolated parts of inland NSW. The Murray-Darling Basin recorded 73.3 mm during the month, well above the historical average of 48.5 mm.

Several rain events occurred during the month. Between the 6th and 8th, a low pressure trough caused moderate to heavy rain across northern NSW, reaching 98.8 mm at Tweed Heads on the 8th and exacerbating the flooding in this area following heavy November rain. A second low pressure trough brought rain in the east between the 10th and 12th, with falls reaching 124.6 mm at Gosford on the 12th. In southern NSW, the most significant rain event was due to a low pressure trough which crossed the state between the 18th and 20th, triggering widespread thunderstorms and locally heavy falls and reaching 61 mm at Hillston on the 19th. A further trough triggered additional thunderstorms on the 25th and 26th, bringing additional falls to central NSW.

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

Temperature

December 2011 was the 4th coldest for NSW in 62 years of record, with statewide average temperatures 1.7 °C below the historical average and the coolest since 1999. The cool temperatures were associated with southerly winds bringing cool air into the state, and a lack of very warm days during the month. Maximum temperatures were particularly cold across NSW, associated with well above average cloud cover during December.

The average maximum temperature in NSW during December was 28.1 °C, 2.5 °C below the historical average of 30.6 °C. This is the 3rd coldest December on record for NSW, only 0.1 °C warmer than 1992 and 1999. Only southwestern NSW had close to normal temperatures during the month, with most of the northeast more than 3 °C below average, their coldest December on record. The all-time record for lowest maximum temperatures was broken at 54 of the 114 stations with more than 20 years of records, almost half the state, with the previous record exceeded by more than 1 °C at long-record sites including Jerrys Plains and Quirindi.

Temperatures were coolest during the first part of the month, particularly between the 6th and 8th which broke daily records at some northern stations. Temperatures warmed later in the month, with temperatures exceeding 40 °C in parts of the state on the 24th and 25th. However, temperatures remained cooler than average in northeastern NSW for most of the month.

Minimum temperatures in NSW were 0.9 °C below average during December, coolest since 1999. Most of NSW was below average, excluding the southern border, with coolest conditions in northeastern NSW and record-breaking temperatures at 9 stations. Nights were particularly cool at the start of the month, including temperatures more than 6 °C below average across much of NSW on the 1st, but warmed during the second half of the month.

Some sites had their coldest December day (lowest maximum temperature) on record. Some sites had their lowest December mean daily maximum temperature on record. See a map of maximum temperature anomalies.

Some sites had their lowest December temperature on record. Some sites had their lowest December mean daily minimum temperature on record. See a map of minimum temperature anomalies.

Other Phenomena

Severe thunderstorms on the 12th were associated with heavy rain at Ballina, as well as hail of up to 3cm. Further severe storms on the 22nd were associated with reports of small hail at locations including Cobar, NE of Wagga Wagga, and SE of Tamworth, in addition to rain of up to 27 mm in 30 minutes at Myrtle Creek. The strongest wind gusts were on the offshore islands, with Lord Howe Island recording 104 km/hr on the 9th, and 89 km/hr at Norfolk Island. The strongest gusts in mainland NSW were 91 km/hr at Fowlers Gap on the 25th and 94 km/hr at Wattamolla on the 26th, associated with thunderstorm activity.

There were several incidents of flooding in NSW during the month. Floodwaters from Queensland extended into far western NSW, while rain in the Northern Tablelands added to existing flooding from November in the northern central regions of NSW. In addition, a severe rain event had hourly totals as high as 65 mm at Gosford on the morning of the 12th, with flash flooding across the Central Coast including the isolation of Narara High School and stranding of several school buses.

Further information

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Extremes in December 2011
Hottest day 41.2 °C at Pooncarie Mail Agency on the 24th
Warmest days on average 33.0 °C at Ivanhoe Post Office
Coolest days on average 13.2 °C at Thredbo AWS
Coldest day 6.1 °C at Thredbo AWS on the 5th
Coldest night -4.3 °C at Thredbo AWS on the 5th
Coolest nights on average 3.0 °C at Perisher Valley AWS
3.0 °C at Thredbo AWS
Warmest nights on average 19.9 °C at Tibooburra Post Office
Warmest night 27.4 °C at Tibooburra Post Office on the 26th
Warmest on average overall 26.2 °C at Tibooburra Post Office
Coolest on average overall 7.9 °C at Thredbo AWS
Wettest overall 329.0 mm at Boat Harbour (Rous River)
Wettest day 124.6 mm at Gosford (Narara Research Station) AWS on the 12th
Highest wind gust 104 km/h at Lord Howe Island Windy Point on the 9th

Record highest December daily rainfall
Highest daily rainfall
in December 2011 (mm)
Previous wettest
for December
Years of
record
Hillston Airport 61.0 on the 19th 51.8 on the 8th in 1930 127
Gravesend Post Office 114.0 on the 16th 99.1 on the 8th in 1959 122
Booroorban (Ramsay) 94.6 on the 19th 86.1 on the 7th in 1930 84
Wollombi (Narone Creek Rd) 77.4 on the 12th 66.3 on the 11th in 2002 39



Record lowest December daily maximum temperature
Lowest daily maximum
temperature
in December 2011 (°C)
Previous coolest
for December
Years of
record
Average for
December
Brewarrina Hospital 19.0 on the 6th 19.8 on the 27th in 1975 97 35.1
Mungindi Post Office 18.1 on the 6th 20.1 on the 27th in 1999 46 34.5
Tabulam (Muirne) 13.4 on the 6th 14.1 on the 1st in 1986 42 26.9
Murwillumbah (Bray Park) 19.2 on the 7th 19.9 on the 15th in 1981 36 29.2



Record lowest December mean daily maximum temperature
Mean daily maximum
temperature
for December 2011 (°C)
Previous coolest
for December
Years of
record
Average for
December
Coonabarabran (Namoi Street) 25.3 25.6 in 1947 132 30.5
Jerrys Plains Post Office 25.5 26.7 in 1960 104 31.3
Glen Innes Post Office 22.0 22.2 in 1927 98 25.7
Grenfell (Manganese Rd) 25.7 25.9 in 1995 93 29.9
Wellington (Agrowplow) 26.5 28.0 in 2010 93 31.5
Casino Airport 26.7 27.5 in 2010 92 31.2
Collarenebri (Albert St) 29.1 30.2 in 2010 91 34.7
Murrurundi Post Office 23.7 25.9 in 1999 91 29.7
Quirindi Post Office 26.9 27.8 in 1927 90 31.2
Nyngan Airport 28.8 28.9 in 1927 89 33.0
Brewarrina Hospital 29.7 29.8 in 1999 88 35.1
Bathurst Agricultural Station 22.9 = 22.9 in 1992 87 26.3
Mungindi Post Office 29.2 30.4 in 1942 87 34.5
Katoomba (Murri St) 17.7 19.4 in 1978 83 22.4
Sydney Airport AMO 22.6 22.7 in 1943 72 25.7
Williamtown RAAF 23.8 24.4 in 1960 62 27.3
Gunnedah Resource Centre 26.3 27.8 in 1999 59 31.0
Dunedoo Post Office 26.1 27.0 in 1947 55 30.8
Inverell Research Centre 24.7 25.4 in 1999 52 28.3
Quandialla Post Office 27.7 27.8 in 1992 52 31.4
Taralga Post Office 20.6 20.7 in 1992 51 24.3
Barraba Post Office 26.2 27.4 in 1999 45 30.5
Grafton Olympic Pool 26.2 27.1 in 1999 45 29.7
Bowral (Parry Drive) 19.2 21.0 in 1992 44 23.9
Parramatta North (Masons Drive) 22.9 24.9 in 1995 44 27.5
Prospect Reservoir 23.4 23.7 in 1966 44 27.5
Bankstown Airport AWS 23.8 24.9 in 1995 43 27.3
Peak Hill Post Office 27.3 28.1 in 2010 43 31.3
Yarras (Mount Seaview) 24.1 25.9 in 1999 42 28.7
Tabulam (Muirne) 23.0 23.5 in 2010 41 26.9
Oberon (Springbank) 18.8 19.8 in 1947 39 23.3
Woolbrook (Danglemah Road) 21.5 23.1 in 1999 39 26.2
Cooma Visitors Centre 22.0 22.4 in 1992 38 25.1
Gulgong Post Office 25.1 26.5 in 2010 38 29.6
Glen Innes Ag Research Stn 21.3 21.4 in 1973 36 24.3
Camden Airport AWS 23.9 25.0 in 1983 35 28.5
Goulburn TAFE 21.9 22.9 in 1978 35 25.8
Murwillumbah (Bray Park) 26.1 26.5 in 1999 35 29.2
Orange Agricultural Institute 20.8 20.9 in 1992 35 24.4
Cessnock (Nulkaba) 24.6 26.4 in 1978 34 29.5
Gosford (Narara Research Station) AWS 22.9 24.6 in 1999 31 26.9
Peats Ridge (Waratah Road) 21.3 23.5 in 1995 30 26.0
Nelson Bay (Nelson Head) 23.4 23.5 in 1968 25 26.2
Guyra Hospital 19.1 19.8 in 1999 24 22.5
Braidwood Racecourse AWS 20.1 21.8 in 1995 21 24.4
Cessnock Airport AWS 24.0 25.9 in 1995 21 28.9
Batemans Bay (Catalina Country Club) 22.1 22.6 in 1995 20 24.5
Bathurst Airport AWS 22.8 23.6 in 1992 20 26.3
Bombala AWS 19.7 20.1 in 1995 20 23.1
Goulburn Airport AWS 21.9 22.7 in 1992 20 25.6
Mount Boyce AWS 17.9 19.4 in 1992 20 22.2
Mudgee Airport AWS 24.2 25.5 in 1992 20 28.3
Nullo Mountain AWS 17.3 17.9 in 1992 20 22.0
Scone Airport AWS 25.5 26.2 in 1992 20 29.7




Record lowest December temperature
Lowest temperature
in December 2011 (°C)
Previous coolest
for December
Years of
record
Average for
December
Taralga Post Office -0.2 on the 5th 0.0 on the 7th in 2002 50 9.8
Katoomba (Murri St) 2.4 on the 5th 3.0 on the 13th in 1995 49 11.7
Brewarrina Hospital 7.0 on the 28th 9.0 on the 5th in 1984 43 18.9
Goulburn Airport AWS -0.6 on the 5th 0.6 on the 7th in 2002 21 10.7
Mount Boyce AWS 2.4 on the 5th 2.8 on the 13th in 1995 21 11.4



Record lowest December mean daily minimum temperature
Mean daily minimum
temperature
for December 2011 (°C)
Previous coolest
for December
Years of
record
Average for
December
Tenterfield (Federation Park) 11.0 11.3 in 1999 96 13.0
Bankstown Airport AWS 14.9 15.1 in 1969 43 16.6
Gulgong Post Office 12.7 = 12.7 in 1974 37 14.9
Guyra Hospital 8.9 = 8.9 in 1999 24 10.7
Braidwood Racecourse AWS 8.8 = 8.8 in 2005 21 10.3
Bombala AWS 6.9 7.6 in 1991 20 9.0
Goulburn Airport AWS 8.7 9.3 in 1996 20 10.7
Nullo Mountain AWS 9.1 9.7 in 1992 20 11.7
Scone Airport AWS 13.2 13.8 in 1999 20 15.3



Summary statistics for December 2011
Maximum temperatures
for December
(°C)
Minimum temperatures
for December
(°C)
Rainfall
for December
(millimetres)
Mean for
December
2011
Diff
from
average
Highest for
December
2011
Mean for
December
2011
Diff
from
average
Lowest for
December
2011
Total for
December
2011
Average
for
December
Rank of
December
2011
Fraction of
December
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 32.3   40.2 25th 18.3   13.0 1st 13.2
Tibooburra Airport 32.3   39.7 25th 19.6   15.1 7th 54.6
Tibooburra Post Office 32.4 -2.5 40.8 25th 19.9 -0.4 14.8 7th 34.4 22.3 high 154%
White Cliffs AWS 32.5   39.5 24th 18.9   14.3 1st 39.0
Wilcannia (Reid St) 32.6 -1.3 40.2 25th 17.6 -0.6 10.7 3rd 48.6 26.2 high 185%
Wilcannia Aerodrome AWS 32.7   40.6 25th 16.8   10.1 3rd 47.0
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 31.0 -0.3 39.3 24th 16.4 -0.7 10.0 1st 33.6 21.8 high 154%
Broken Hill Airport AWS 30.8 -0.3 38.7 24th 15.8 -1.3 9.9 1st 33.4 21.9 high 153%
Lake Victoria Storage 29.9 -0.4 38.5 24th 15.1 -0.2 8.2 1st 57.6 20.8 v high 277%
Menindee Post Office 32.5 -0.3 41.0 25th 17.2 +0.5 12.2 1st 8.0 21.9 average 37%
Pooncarie Mail Agency 32.2   41.2 24th 16.3   10.8 5th 18.6 21.5 average 87%
Western (Upper Darling) (district 48)
Bourke Airport AWS 31.0   35.9 25th 17.8   12.3 2nd 89.8
Brewarrina Hospital 29.7 -5.4 34.0 25th 16.7 -2.2 7.0 28th 102.4 39.2 v high 261%
Cobar Airport AWS 30.2   37.1 25th 16.7   9.3 1st 52.4
Cobar MO 29.9 -2.6 37.3 25th 17.1 -1.6 11.1 1st 39.2 36.9 average 106%
Collarenebri (Albert St) 29.1 -5.6 32.3 27th 17.5 -1.5 14.0 14th 12.2 52.9 low 23%
Lightning Ridge Visitors Information Cen 29.8   33.5 25th 18.0   14.0 8th 144.6
Wanaaring Post Office 31.9   38.5 25th 19.1   12.1 1st 76.4 29.2 v high 262%
Western (Southwest Plains) (district 49)
Balranald (RSL) 29.6 -1.3 37.1 27th 14.6 -0.1 7.1 1st 69.0 25.5 v high 271%
Ivanhoe Aerodrome AWS 32.1   39.8 25th 16.8   10.0 2nd 8.6
Ivanhoe Post Office 33.0 -0.3 41.0 25th 16.1 -0.2 9.0 1st 12.1 26.1 average 46%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 28.5 -3.2 34.2 25th 14.8 -0.9 7.8 1st 109.4 41.7 v high 262%
Condobolin Airport AWS 28.7   35.4 25th 14.7   7.8 1st 95.8
Peak Hill Post Office 27.3 -4.0 33.0 25th 15.9 -1.3 10.8 1st 91.2 50.7 high 180%
West Wyalong Airport AWS 28.2   34.0 25th 13.7   9.3 1st 34.4
Central Western Plains (North) (district 51)
Coonamble Airport AWS 28.2   31.3 25th 15.5   10.8 5th 128.4
Nyngan Airport 28.8 -4.2 34.5 25th 15.8 -2.0 12.0 2nd 96.4 43.2 high 223%
Trangie Research Station AWS 28.2 -3.6 33.0 25th 14.7 -1.9 9.8 13th 49.0 41.6 average 118%
Northwest Plains (West) (district 52)
Mungindi Post Office 29.2 -5.3 33.2 26th 18.1 -0.8 14.0 14th 137.1 52.3 v high 262%
Walgett Airport AWS 29.6   33.0 25th 16.6   11.8 13th 84.6
Northwest Plains (East) (district 53)
Moree Aero 28.1   32.0 27th 17.0   12.7 2nd 126.6
Northwest Slopes (North) (district 54)
Barraba Post Office 26.2 -4.3 29.5 25th 13.1 -1.5 7.7 2nd 145.2 77.9 v high 186%
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 27.1   31.0 25th 14.3   10.2 3rd 94.0
Gunnedah Resource Centre 26.3 -4.7 30.4 25th 15.5 -2.0 11.3 3rd 81.8 71.5 average 114%
Quirindi Post Office 26.9 -4.3 32.0 25th 13.0 -1.8 7.8 3rd 40.0 80.6 low 50%
Tamworth Airport AWS 26.3   30.1 25th 13.3   8.0 3rd 79.8
Woolbrook (Danglemah Road) 21.5 -4.7 25.5 20th 9.6 -1.0 5.0 17th 111.0 98.6 average 113%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 20.7   24.9 26th 10.6   6.5 29th 111.6
Armidale Airport AWS 20.0   24.4 26th 10.3   7.0 6th 111.8
Glen Innes Ag Research Stn 21.3 -3.0 25.0 29th 10.5 -1.6 6.0 2nd 91.8 109.6 average 84%
Glen Innes Airport AWS 21.3   25.1 29th 10.2   6.3 13th 95.6
Glen Innes Post Office 22.0 -3.7 26.0 29th 11.2 -0.9 7.6 2nd 69.8 107.9 low 65%
Guyra Hospital 19.1 -3.4 23.2 26th 8.9 -1.8 5.4 6th 105.7 113.5 average 93%
Inverell (Raglan St) 25.5   28.7 31st 12.9   7.5 2nd 135.8
Inverell Research Centre 24.7 -3.6 27.3 31st 13.3 -1.7 9.5 3rd 143.4 99.2 high 145%
Tenterfield (Federation Park) 22.4 -4.3 27.9 27th 11.0 -2.0 6.5 2nd 59.3 105.2 low 56%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 23.0 -3.9 29.3 20th 14.3 -1.9 10.8 6th 109.1 152.9 average 71%
Upper North Coast (district 58)
Ballina Airport AWS 25.3   28.9 20th 17.3   11.7 4th 201.2 142.9 high 141%
Byron Bay (Cape Byron AWS) 24.4   28.0 22nd 18.0   14.5 7th 111.6
Casino Airport 26.7 -4.5 31.5 27th 16.7 -1.2 12.8 8th 132.0 116.0 average 114%
Casino Airport AWS 26.3   30.8 27th 16.6   12.7 18th 90.6
Evans Head RAAF Bombing Range AWS 25.0   31.1 20th 17.2   13.8 6th 132.2
Grafton Airport AWS 25.9   31.3 11th 15.9   11.2 3rd 83.6
Grafton Olympic Pool 26.2 -3.5 31.0 20th 17.3 -1.1 13.4 18th 109.0 120.3 average 91%
Grafton Research Stn 25.7   30.8 20th 16.7   13.9 17th 103.8 101.5 average 102%
Lismore (Richmond Hill) 25.8   30.4 20th 16.5   13.0 4th 120.4
Lismore Airport AWS 26.0   31.1 20th 16.3   12.0 18th 85.0
Murwillumbah (Bray Park) 26.1 -3.1 31.0 27th 17.9 -0.5 14.5 4th 236.1 170.2 high 139%
Yamba Pilot Station 24.4 -1.5 28.3 20th 18.0 -1.1 14.4 6th 109.6 117.0 average 94%
Lower North Coast (district 59)
Coffs Harbour MO 24.4 -1.9 27.7 27th 16.9 -1.2 13.1 7th 170.8 145.7 average 117%
Dorrigo (Old Coramba Rd) 19.8   24.5 26th 12.0   8.8 7th 192.3
Kempsey (Wide Street) 25.3 -3.3 29.1 20th 16.3 -0.2 12.8 3rd 115.3 110.4 average 104%
Kempsey Airport AWS 25.1   28.9 20th 15.2   10.9 4th 115.0
South West Rocks (Smoky Cape Lighthouse) 25.0 -0.9 28.5 26th 16.5 -1.9 12.8 6th 83.0 119.4 average 70%
Manning (district 60)
Forster - Tuncurry Marine Rescue 23.7   27.0 24th 15.9   10.0 3rd 109.1 92.8 average 118%
Port Macquarie Airport AWS 24.2   28.1 20th 15.9   11.6 16th 131.4
Taree Airport AWS 24.1   28.8 4th 15.6   11.0 4th 88.2
Yarras (Mount Seaview) 24.1 -4.6 29.0 4th 15.7 -0.4 12.2 3rd 328.6 177.5 high 185%
Hunter (district 61)
Cessnock (Nulkaba) 24.6 -4.9 29.5 11th 14.5 -1.7 7.9 3rd 91.6 70.7 high 130%
Cessnock Airport AWS 24.0 -4.9 28.7 25th 14.0 -0.8 7.6 3rd 89.8 77.5 high 116%
Cooranbong (Lake Macquarie AWS) 23.5   28.8 26th 14.3   8.4 3rd 145.0
Gosford (Narara Research Station) AWS 22.9 -4.0 28.2 11th 14.4 -0.9 9.1 3rd 226.0 104.1 high 217%
Jerrys Plains Post Office 25.5 -5.8 31.0 25th 14.4 -1.3 6.9 3rd 33.0 67.9 low 49%
Maitland Visitors Centre 24.6   29.6 26th 14.8   9.0 3rd 157.3
Mangrove Mountain AWS 21.8   27.6 11th 13.4   8.1 3rd 124.4
Merriwa (Roscommon) 24.5   29.1 25th 11.8   4.5 3rd 38.4 69.4 low 55%
Murrurundi Gap AWS 21.1   26.1 25th 11.6   6.4 3rd 70.6
Murrurundi Post Office 23.7 -6.0 28.9 25th 11.9 -1.7 4.4 3rd 49.0 89.8 low 55%
Nelson Bay (Nelson Head) 23.4 -2.8 28.0 24th 17.4 0.0 14.4 3rd 114.2 95.0 average 120%
Newcastle Nobbys Signal Station AWS 21.8 -3.1 27.2 26th 17.4 -0.6 13.0 3rd 71.4 81.0 average 88%
Newcastle University 23.7   29.2 26th 16.0   10.4 3rd 78.8
Norah Head AWS 22.4   27.0 25th 17.1   12.4 5th 95.0
Peats Ridge (Waratah Road) 21.3 -4.7 27.8 25th 13.5 -1.4 8.5 3rd 106.2 95.4 average 111%
Scone Airport AWS 25.5 -4.2 30.2 25th 13.2 -2.1 6.4 3rd 45.4
Singleton STP 25.2   29.8 4th     11.3 17th 69.6
Williamtown RAAF 23.8 -3.5 30.0 26th 15.4 -1.1 10.2 3rd 88.2 79.6 high 111%
Central Tablelands (North) (district 62)
Gulgong Post Office 25.1 -4.5 29.8 25th 12.7 -2.2 7.8 2nd 76.6 67.4 average 114%
Mudgee Airport AWS 24.2 -4.1 29.3 25th 12.8 -0.7 7.5 3rd 63.8
Nullo Mountain AWS 17.3 -4.7 22.8 25th 9.1 -2.6 3.0 5th 81.4
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 22.9 -3.4 28.1 25th 10.1 -1.5 5.0 3rd 107.2 66.1 high 162%
Bathurst Airport AWS 22.8 -3.5 29.1 25th 10.2 -1.3 4.6 5th 133.2
Katoomba (Murri St) 17.7 -4.7 25.0 24th 9.6 -2.1 2.4 5th 160.2 123.6 high 130%
Lithgow (Cooerwull) 19.2   25.7 25th 9.9   1.3 3rd 91.0 78.1 average 117%
Mount Boyce AWS 17.9 -4.3 24.5 25th 9.2 -2.2 2.4 5th 128.4
Oberon (Springbank) 18.8 -4.5 25.0 25th 8.1 -0.8 1.9 5th 92.8 74.2 average 125%
Orange Agricultural Institute 20.8 -3.6 26.2 25th 9.3 -2.0 4.0 2nd 128.8 84.4 high 153%
Orange Airport AWS 20.5   26.7 25th 8.7   3.3 7th 97.0
Springwood (Valley Heights) 22.1   28.7 25th 13.4   8.3 5th 115.2 102.2 average 113%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 25.3 -5.2 29.9 25th 11.6 -1.6 5.5 3rd 122.1 71.5 high 171%
Coonabarabran Airport AWS 24.0   28.5 25th 12.7   6.7 5th 175.2
Dunedoo Post Office 26.1 -4.7 31.4 25th 14.0 -1.0 9.8 5th 67.7 62.8 average 108%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 26.7   31.8 25th 12.6   7.8 3rd 111.2
Dubbo Airport AWS 27.1   32.2 25th 13.7   9.4 2nd 74.8
Forbes Airport AWS 27.6   32.3 25th 13.6   8.4 1st 120.4
Parkes (Macarthur Street) 27.5 -3.2 33.0 24th 14.4 -1.8 9.5 1st 130.6 53.0 v high 246%
Parkes Airport AWS 27.1   33.0 25th 13.5   8.2 14th 102.2 54.3 high 188%
Wellington (Agrowplow) 26.5 -5.0 31.5 25th 13.7 -1.4 9.3 2nd 68.0 56.4 average 121%
Metropolitan (East) (district 66)
Bankstown Airport AWS 23.8 -3.5 29.2 26th 14.9 -1.7 9.7 7th 111.8 68.2 high 164%
Canterbury Racecourse AWS 22.8   28.3 11th 15.1   8.6 7th 140.8
Holsworthy Control Range 23.4   28.7 26th 14.0   7.9 7th 62.8
Parramatta North (Masons Drive) 22.9 -4.6 28.3 26th 14.6 -1.6 9.5 3rd 136.0 71.6 high 190%
Riverview Observatory 22.6 -3.2 28.0 26th 15.3 -1.0 10.0 7th 140.8 83.6 high 168%
Sydney (Observatory Hill) 23.1 -2.1 26.8 26th 16.7 -0.8 11.8 5th 78.4 77.9 average 101%
Sydney Airport AMO 22.6 -3.1 28.4 26th 16.8 -0.7 12.0 5th 110.6 74.3 high 149%
Sydney Harbour (Wedding Cake West) 20.6   25.8 26th 17.2   12.1 5th
Sydney Olympic Park AWS (Archery Centre) 23.0   28.5 26th 15.6   10.2 7th 133.2
Terrey Hills AWS 21.4   26.3 26th 14.7   9.5 5th 136.2
Metropolitan (West) (district 67)
Badgerys Creek AWS 23.7   29.4 25th 14.0   8.7 5th 99.6
Horsley Park Equestrian Centre AWS 23.3   28.6 25th 14.4   9.9 5th 105.2
Penrith Lakes AWS 24.8   31.3 25th 15.1   10.2 3rd 88.2
Prospect Reservoir 23.4 -4.1 28.8 25th 14.7 -1.7 10.5 3rd 118.4 75.5 high 157%
Richmond RAAF 23.9   29.6 25th 14.8   9.1 3rd 67.2
Illawarra (district 68)
Bellambi AWS 20.8   24.8 24th 15.8   10.8 5th 97.4
Bowral (Parry Drive) 19.2 -4.7 25.8 25th 9.9 -1.7 3.1 5th 80.4 76.4 average 105%
Camden Airport AWS 23.9 -4.6 29.4 25th 13.7 -1.5 7.4 7th 82.0 55.4 high 148%
Campbelltown (Mount Annan) 23.9   29.1 25th 13.5   7.6 5th 70.6
Jervis Bay (Point Perpendicular AWS) 20.9   26.4 26th 15.7   10.5 5th 62.4
Kiama (Bombo Headland) 20.9   25.2 24th 15.8   11.7 5th 50.8
Moss Vale AWS 18.9   25.1 26th 9.9   2.5 7th 61.0
Nowra RAN Air Station AWS 22.3   28.4 26th 13.4   8.9 3rd 83.2
South Coast (district 69)
Batemans Bay (Catalina Country Club) 22.1 -2.4 27.8 25th 13.3 -0.6 7.9 7th 36.8 78.8 v low 47%
Bega AWS 23.3   29.5 25th 11.9   5.8 3rd 35.2
Braidwood Racecourse AWS 20.1 -4.3 27.7 25th 8.8 -1.5 0.0 5th 68.6 62.0 average 111%
Green Cape AWS 21.2   24.8 30th 14.8   10.2 3rd 34.4
Merimbula Airport AWS 22.1   26.9 26th 12.3   6.5 3rd 37.2
Montague Island Lighthouse 20.5 -1.2 23.2 24th 15.4 -0.5 10.1 5th 33.6 66.0 low 51%
Moruya Airport AWS 21.7   25.3 25th 13.5   8.2 3rd 47.4
Moruya Heads Pilot Station 20.9 -1.9 24.1 26th 14.2 -0.5 9.4 1st 43.6 73.7 average 59%
Narooma (Marine Rescue) 20.6 -1.4 23.9 26th 14.3 -0.7 10.0 3rd 32.0 73.5 low 44%
Ulladulla AWS 20.8 -2.1 26.1 11th 14.9 -0.8 9.9 5th 42.6
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 21.2 -2.6 28.0 31st 7.6 -1.3 1.4 3rd 44.2 63.9 average 69%
Bombala AWS 19.7 -3.4 27.1 24th 6.9 -2.1 0.5 3rd 62.4
Canberra Airport 23.6   28.8 25th 10.3   3.3 5th 72.2
Cooma Airport AWS 21.1 -2.9 27.5 31st 7.1 -1.4 -1.0 6th 47.2 53.0 average 89%
Cooma Visitors Centre 22.0 -3.1 28.0 31st 7.9 -1.2 0.1 6th 93.9 55.5 high 169%
Goulburn Airport AWS 21.9 -3.7 30.0 25th 8.7 -2.0 -0.6 5th 44.4
Goulburn TAFE 21.9 -3.9 30.5 25th 10.1 -1.6 2.1 5th 49.0 62.2 average 79%
Mount Ginini AWS 14.8   20.7 25th 5.1   -3.0 5th 172.8
Taralga Post Office 20.6 -3.7 29.0 25th 8.9 -0.9 -0.2 5th 79.3 66.6 average 119%
Tidbinbilla Nature Reserve 22.1 -2.9 27.5 25th 9.9 -0.9 3.2 1st 94.4 65.3 high 145%
Tuggeranong (Isabella Plains) AWS 23.4   29.2 24th 11.3   4.6 1st 140.6
Southern Tablelands (Snowy Mountains) (district 71)
Perisher Valley AWS 15.5   21.0 24th 3.0   -4.2 6th 128.2
Thredbo AWS 13.2 -0.9 18.3 24th 3.0 -1.7 -4.3 5th 93.4 110.2 average 85%
Thredbo Village 18.2 -0.9 22.8 24th 5.1 -0.2 -1.0 1st 121.5 123.0 average 99%
Southwest Slopes (South) (district 72)
Albury Airport AWS 27.7   33.1 24th 13.9   7.2 1st 33.4
Cabramurra SMHEA AWS 16.7   21.9 24th 7.4   -0.9 5th 81.6
Hume Reservoir 27.9 -0.6 32.9 24th 14.8 +0.5 7.4 1st 60.2 49.8 average 121%
Khancoban AWS 26.1   31.2 24th 10.8   2.4 5th 86.2
Tumbarumba Post Office 24.8 -1.1 30.5 24th 9.8 +0.3 2.8 1st 82.4 71.0 average 116%
Wagga Wagga AMO 27.4 -2.0 32.7 24th 13.8 0.0 6.9 5th 67.4 46.6 high 145%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 26.5 -1.0 32.5 24th 13.6 0.0 7.5 1st 61.8 62.6 average 99%
Cootamundra Airport 26.3   32.0 24th 12.7   5.8 1st 59.0
Grenfell (Manganese Rd) 25.7 -4.2 31.0 24th 12.7 -1.8 6.2 1st 186.2 55.3 v high 337%
Gundagai (William St) 27.1   32.3 24th 12.6   4.9 5th 51.0
Quandialla Post Office 27.7 -3.7 32.8 25th 14.6 -0.3 7.7 1st 96.7 44.3 high 218%
Temora Airport 27.3   32.8 24th 13.9   7.6 1st 63.8
Wyalong Post Office 28.4 -2.2 33.5 25th 14.5 -0.8 9.0 1st 76.2 44.5 high 171%
Young Airport 26.2 -2.8 31.4 24th 11.5 -0.3 3.2 1st 70.6
Riverina (East) (district 74)
Corowa Airport 28.5 -1.6 35.2 24th 13.4 -0.2 7.0 1st 47.2 40.9 average 115%
Deniliquin Airport AWS 29.2   36.9 24th 14.0   6.8 1st 31.8
Narrandera Airport 30.1   36.2 24th 14.3   7.1 2nd 15.0 36.3 average 41%
Narrandera Golf Club 30.0 -0.4 36.4 24th 12.8 -2.3 5.0 2nd 18.2 37.2 average 49%
Tocumwal Airport 28.7 -0.7 35.4 24th 14.1 +0.2 6.7 5th 44.4 33.9 high 131%
Yanco Agricultural Institute 30.4   37.0 25th 15.0   8.8 2nd 17.6 30.0 average 59%
Riverina (West) (district 75)
Griffith Airport AWS 30.2 -0.6 38.2 25th 15.2 +0.1 6.5 2nd 23.8 33.3 average 71%
Hay (Miller Street) 30.6 -0.6 37.0 25th 15.1 +0.2 7.3 5th 32.9 27.0 high 122%
Hay Airport AWS 31.2   38.0 25th 14.3   6.7 1st 42.8
Hillston Airport 30.8 -0.7 37.8 25th 16.6 +0.2 10.0 1st 89.0 30.0 v high 297%
Lake Cargelligo Airport 30.1 -2.3 37.0 25th     8.6 2nd 24.4 37.1 average 66%
Offshore Islands (district 200)
Lord Howe Island Aero 22.5 -1.5 25.1 1st 18.7 -0.5 15.9 7th 175.6 107.2 high 164%
Norfolk Island Aero 23.5 +0.1 25.5 12th 18.9 +1.1 16.2 8th 326.4 86.0 v high 380%

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 11 am on Tuesday 3 January 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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