New South Wales in 2010: La Niña brings wettest year in half a century

  • Third wettest year on record for NSW, wettest in over 50 years.
  • Wettest year on record in the Murray-Darling Basin.
  • 9th consecutive year with above average minimum temperatures.
  • Slightly above average mean temperatures; coolest year since 1996.

Rainfall

NSW recorded 803.14mm of rainfall during 2010, well above the average of 559.0mm and the third wettest year on record. This is the highest rainfall recorded in the state in over fifty years, following the very strong La Niña events in 1956 (829.52) and 1950 (908.45), and slightly higher than the rainfall recorded during strong La Niña events in the 1970s. In addition, 2010 was the wettest year on record for the Murray-Darling Basin with a total rainfall of 794.27mm, slightly higher than the previous record set in the La Niña of 1956 (786.53mm).

Seventeen stations across NSW recorded their highest annual rainfall on record during 2010, with a further 103 recording their highest rainfall in at least twenty years. In almost all cases, the previous rainfall records were in strong La Niña years 1950 and 1956, or during the wet La Niña period between 1973 and 1976. Several stations also recorded over 2 metres of rainfall, reaching a maximum of 2914.4mm at Yarras (Mt Seaview) in the Central Tablelands. However, the rain on the mainland did not extend to offshore islands, with Norfolk Island recording its driest year in 114 years of record with just 776.7mm (previous record 1976).

The wet conditions were the result of a very strong La Niña event in the Pacific Ocean, in combination with a negative Indian Ocean Dipole event, both of which bring increased rainfall to Australia. In particular, Spring 2010 was the wettest on record for both NSW and Australia, with above average rainfall for six consecutive months July-December in addition to high rainfall in February and March as the 2009 El Niño event broke down.

Rainfall was highest in NSW west of the Great Dividing Range, with almost all areas experiencing falls in the top 10% of years and numerous records broken. In comparison, the east coast experienced close to average falls throughout the year, consistent with patterns in previous La Niña years, with Newcastle Nobbys Head recording its lowest annual rainfall since 1980. The heavy rainfall throughout the year resulted in several major flooding events in February, March, October and December, causing widespread damage and evacuations, with the State Emergency Services Minister declaring flood-related losses of as much as $500 million in NSW during the year.

The sustained rainfall throughout 2010 has broken the long-term drought in southeastern Australia, with no part of NSW declared in drought or marginal by the Department of Industry and Investment (DII) in December 2010. This is the lowest area of drought since May 2001 and a significant change from January 2010, when 81.8% of the state was in drought and a further 13.8% marginal. For more information on drought declarations see the DII.

Some sites had their highest total rainfall on record.
Norfolk Island had its lowest total rainfall on record.
See a map of rainfall deciles.

Temperature

NSW had close to average temperatures during 2010, with mean temperatures only 0.06 °C above the 1961-1990 average. This is significantly cooler than 2009, which was the warmest year on record in NSW, and the coolest year since 1996. In general, years of high rainfall (and most La Niña years), have lower daytime maximum temperatures.  Hence the cooler temperatures in 2010 were primarily due to La Niña. However, this is significantly warmer than the previous strong La Niña years in 1974 and 1956, which had mean temperatures 0.51 °C and 1.17 °C below average respectively. This demonstrates the fact that although individual years may show variability, the underlying warming trend has not stopped, with global average temperatures in 2010 likely to be among the three hottest years on record (WMO).

Maximum temperatures during 2010 were 0.47 °C below average, the coolest since 1992, with much of northern and western NSW experiencing well below average maximum temperatures and nine stations recording their coolest maximums in over twenty years. This is a consequence of the high rainfall and subsequently increased cloud cover over NSW during the year, with particularly cooler temperatures at the end of the year with the fifth coldest December on record. July 2nd was also very cold, with Casino recording its coldest day on record at just 12.9 °C (previous record 13.3 °C).

However, the eastern seaboard of NSW continued to have above average temperatures during 2010, with Sydney Observatory Hill recording mean maximum temperatures of 22.6 °C, 0.9 °C above average. In addition, Lord Howe Island recorded its warmest year for maximum temperatures on record, likely related to the very warm sea surface temperatures off the Australian coastduring 2010.

In comparison, minimum temperatures in NSW were 0.60 °C above average during 2010, the 11th warmest on record, with almost all of the state recording above average minimums and the eastern half of NSW recording minimums in the top 10% of years. Higher night time temperatures are also typical for years of high rainfall and cloud cover. Three stations recorded their highest mean minimum temperatures on record during 2010, with a further five recording their warmest minimums since 1983, primarily in the Mid North Coast and Hunter regions. January 23 was a particularly warm night, with Sydney Airport, Yass and Goulburn recording their warmest nights on record and large parts of southeastern NSW recording minimums over 10 °C above average.

In addition, the average 3pm vapour pressure (a measure of humidity) in NSW was the second highest since records started in 1970 and the highest since the La Niña event of 1973/4, with both spring and winter the most humid on record for the state.

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

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

Other phenomena

Snow

A strong southerly airstream following a cold front on the 18th of January brought snowfalls to the Snowy Mountains with about 8 cm recorded at 2000 metres above sea level. Snow fell in Thredbo Village (elevation 1380 metres) on the morning of the 18th; at this location, snow normally falls in January once in every 3 years on average. Light snow fell as low as 900 metres in the Cooma-Bombala region with no previous records of snow falling in January at these locations (records since 1965).

Significant snow fell in the Snowy Mountains during August, with the highest equivalent rainfall since at least 2001 at Jindabyne and Thredbo. Although the Bureau of Meteorology does not record snowfall, external reports suggested this was the highest August total since 1992, with over 200 cm recorded during the month including over 50 cm on the 25th. Snowy Hydro recorded a peak August snow level at Spencers Creek of 192.5 cm.

December 18th and 19th were very cold, with temperatures more than 10 °C below average in much of the state, leading to falls of approximately 10 cm at Charlotte's Pass and the Snowy Mountains. This was also due to a strong cold front crossing the state.

East Coast Low

On May 30th an East Coast Low battered the NSW south coast. Strong winds and heavy rain damaged properties and left up to 9000 homes without power. Two highways (Princes Highway and Snowy Mountains Highway) were closed due to fallen trees. Narooma, Damleny and Bermagui were some of the worst hit areas. Damage included tiles and roofing iron lifted up, windows blown in and buildings flooded. Winds of up to 135km/hour were recorded at Montague Island.

A low pressure system that developed off the NSW coast on the 4th and 5th of September resulted in heavy rain and strong winds across much of NSW, with daily rainfall up to 157 mm at Thredbo Village on the 5th and wind gusts as high as 126 km/h at Bellambi AWS. Maximum gusts exceeded 100 km/h at Mt Ginini and Cabramurra on the 4th, with gusts exceeding 100 km/h recorded at Ulladulla, Nowra, Kiama, Bombala and Newcastle Nobbys on the 5th. The high winds caused extensive damage along the south coast, including roof damage, flying debris, and widespread power loss, while southern inland regions experienced substantial flooding. Over 3000 calls for assistance were received by the SES, with Natural Disasters declared for nine Local Government Areas in southern NSW.

Tornado

On the 3rd of June, a severe thunderstorm developed out of a coastal trough in northern NSW. This event was associated with heavy hail and 24 hour rainfalls of up to 247 mm, causing significant damage to local properties. Associated with this system, a waterspout formed offshore from Lennox Head, near Ballina. This came ashore to form a tornado (F1-F2 on the Fujita scale), which moved northwards towards Ballina before again moving offshore. With winds estimated to be in excess of 150 km/h, this tornado and the associated thunderstorm resulted in the destruction of 12 houses and damage to a further 30, leaving 40 people homeless. Lennox Head was declared a natural disaster zone the following day.

Flooding

Several major flooding events occurred during 2010 as a result of the heavy rainfall during the year, with particularly significant impacts on southern NSW.

January 2010: Following heavy rain in northeast NSW from 26 December to early January, numerous rivers experienced moderate to major flooding during the first 3 weeks of January. The most significant flooding was in the Castlereagh River at Coonamble (Central West Plains) especially around the 4th and 5th when the flood level reached the top of the levee bank causing evacuations in the town (39 warnings issued until 13th). The Castlereagh River peaked at 5.2 metres on the 4th causing major flooding to over 400 rural properties which required fodder and transport support for livestock. It was estimated the damage bill would exceed $3 million in the Coonamble area alone.

February 2010: On the 13th - 14th February, a low pressure trough brought significant rainfall to NSW, including the maximum daily rainfall for the year of 332 mm at Tuross Head. This caused significant flooding in the southeastern and northwestern parts of the state, with over 1500 distress calls to the SES and total damages exceeding $6 million in western regions. The Emergency Services Minister declared Natural Disaster zones in Bega and Eurobodalla in the southeast, and the Central Darling and Cobar shires in the northwest.

March 2010:Torrential rainfall from a monsoonal low over inland Queensland during late February/early March resulted in flooding in rural regions of northwestern NSW near the Paroo, Warego, Darling, Bokhara, Culgoa, Birrie and Narren Rivers. Up to 200 properties and 500 residents were isolated, with evacuations of residents from Weilmoringle and areas of Goodooga, with some areas affected by floodwaters well into April. This event also caused significant damage in Queensland and the Northern Territory, for more information please see the Bureau's Special Climate Statement issued 5th March 2010.

Severe rainfall in southwest NSW associated with the passage of an inland trough between the 5th and the 8th caused significant flooding in the Riverina, particularly near Wagga Wagga, exacerbating existing damage associated with the flooding events in February. Many major roads were closed; with over $1 million in damage from washed out gravel roads and over 100 calls for assistance to the SES. The NSW government declared a natural disaster in the Greater Hume and Central Darling areas on the 9th.

October 2010: Heavy rainfall on the north coast caused minor to moderate flooding in coastal districts on October 5, with several hundred people isolated by floodwaters between the 5th and 6th and leading to natural disaster declarations in 7 shires on the north coast. This event was followed by heavy rain between the 13th and 16th, causing widespread flooding in the Riverina and South West Slopes districts. Many major roads were closed as well as the rail corridor, with power outages, sixty flood rescues and over 1400 calls for assistance to the SES. Hundreds of people were evacuated during this event, particularly related to threat of dam failure at the Mannus Lake. Natural Disasters were declared in 18 shires including Albury and Wagga Wagga.

December 2010: Heavy rain during the last week of November and first weeks of December lead to substantial flooding, with widespread evacuations of towns including Wee Waa, Coonamble, Queanbeyan and Wagga Wagga. The Burrinjuck and Captains Flat dams were in danger of failure, with 135 flood rescues and over 2800 requests for assistance to the SES between November 29 and December 13. Forty-one individual shires across the state had Natural Disasters declared during early December, with 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. This was further exacerbated in late December by rainfall in northern NSW and Queensland, which progressed down river systems during late December and early January and resulted in 700 further requests for assistance between the 13th and 29th of December.

For a list of natural disaster declarations in NSW please see Emergency Management NSW.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in 2010
Hottest day 45.1 °C at Pooncarie Mail Agency on 10 Jan
Warmest days on average 26.8 °C at Mungindi Post Office
Coolest days on average 10.3 °C at Charlotte Pass (Kosciusko Chalet)
Coldest day -4.6 °C at Thredbo AWS on 25 Aug
Coldest night -19.6 °C at Charlotte Pass (Kosciusko Chalet) on 20 Jul
Coolest nights on average 2.4 °C at Thredbo Village
Warmest nights on average 17.5 °C at Lord Howe Island Aero
Warmest night 31.6 °C at Fowlers Gap AWS on 12 Jan
31.6 °C at Ivanhoe Aerodrome AWS on 12 Jan
Warmest on average overall20.3 °C at Byron Bay (Cape Byron AWS)
Coolest on average overall 8.0 °C at Thredbo Village
Wettest overall 2914.4 mm at Yarras (Mount Seaview)
Wettest day 332.0 mm at Tuross Head (Nelson Pde) on 16 Feb
Highest wind gust 135 km/h at Montague Island Lighthouse on 30 May

Record highest total annual rainfall
Total rainfall
for 2010 (mm)
Previous annual
highest
Years of
record
Annual
average
Tarcutta Post Office 1111.6 1061.5 in 1956 135 663.9
Hillston Airport 815.6 711.2 in 1974 123 366.3
Henty Post Office 1144.5 1053.3 in 1974 106 590.9
Ivanhoe (Kilfera) 616.0 547.8 in 1932 86 281.9
Wentworth (Willow Point) 572.4 525.1 in 1974 77 257.6
Bowning (Wanganui) 1096.4 1089.9 in 1974 70 663.9
Wagga Wagga AMO 1019.4 989.4 in 1956 68 566.3
Yarras (Mount Seaview) 2914.4 2881.3 in 1950 54 1681.0
Tharwa General Store 1027.6 921.6 in 1992 49 622.7
Cobar MO 685.4 684.8 in 1973 48 402.4
Orange Agricultural Institute 1592.0 1514.2 in 1973 42 929.7
Orange Airport Comparison 1528.6 1393.0 in 1973 41 898.0
Merriwa (Roscommon) 947.2 885.7 in 2007 35 602.1
Goulburn TAFE 914.2 910.6 in 1984 34 626.2
Ivanhoe (Baden Park) 614.0 573.7 in 1906 34 282.3
Broken Hill (Koralta) 513.3 393.3 in 2000 20 231.6
Parkes Airport AWS 1087.8 955.3 in 1973 20 644.2



Record lowest total annual rainfall
Total rainfall
for 2010 (mm)
Previous annual
lowest
Years of
record
Annual
average
Norfolk Island Aero 783.7 784.2 in 1976 115 1297.0



Record lowest annual daily maximum temperature
Lowest daily maximum
temperature
in 2010 (°C)
Previous annual
lowest
Years of
record
Annual
average
Casino Airport 12.9 on 2 Jul 13.3 on 11 Jul 1997 44 26.8



Record highest annual mean daily maximum temperature
Mean daily maximum
temperature
for 2010 (°C)
Previous annual
highest
Years of
record
Annual
average
Lord Howe Island Aero 22.6 22.5 in 2009 21 22.1





Record highest annual daily minimum temperature
Highest daily minimum
temperature
in 2010 (°C)
Previous annual
highest
Years of
record
Annual
average
Sydney Airport AMO 25.8 on 23 Jan 25.7 on 15 Jan 1978 72 13.4
Yass (Linton Hostel) 26.0 on 23 Jan = 26.0 on 27 Jan 1981 46 7.2
Goulburn TAFE 25.3 on 23 Jan 25.0 on 10 Jan 1979 38 7.4



Record lowest annual temperature
Lowest temperature
in 2010 (°C)
Previous annual
lowest
Years of
record
Annual
average
Prospect Reservoir -0.8 on 30 Jun -0.6 on 17 Jul 2007 46 12.2



Record highest annual mean daily minimum temperature
Mean daily minimum
temperature
for 2010 (°C)
Previous annual
highest
Years of
record
Annual
average
Newcastle Nobbys Signal Station AWS 15.5 15.4 in 2009 142 14.2
Yarras (Mount Seaview) 12.9 = 12.9 in 1990 40 11.7
Nelson Bay (Nelson Head) 16.1 = 16.1 in 2009 21 13.9


Summary statistics for 2010
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean
for
2010
Diff
from
average
Highest
for
2010
Mean
for
2010
Diff
from
average
Lowest
for
2010
Total
for
2010
Average
annual
total
Rank
of
2010
Fraction
of annual
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 25.0   42.5 22 Jan     -0.8 28 Jun 522.8
Tibooburra Airport 25.7   43.3 26 Jan 14.1   0.5 29 Jun 507.4
Tibooburra Post Office 26.0 -1.4 43.0 22 Jan 14.2 +0.3 -0.1 28 Jun 591.6 225.3 v high 263%
White Cliffs AWS 25.4   43.4 22 Jan 13.7   1.2 5 Jul 591.4
White Cliffs Post Office 25.5 -1.4 42.8 12 Jan     -0.2 29 Jun 555.2 247.9 v high 224%
Wilcannia (Reid St) 25.4 -1.2 43.2 22 Jan 12.1 +0.1 -1.1 8 Jul 548.6 260.8 v high 210%
Wilcannia Aerodrome AWS 25.4   44.0 12 Jan 11.9   -1.7 5 Jul 606.0
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 23.6 -0.7 42.3 22 Jan 12.4 +0.5 1.8 6 Jul 540.2 255.2 v high 212%
Broken Hill Airport AWS 23.4 -1.0 41.6 22 Jan 11.6 -0.1 -1.0 6 Jul 472.6 249.3 v high 190%
Lake Victoria Storage 23.8 +0.1 43.5 10 Jan 10.8 0.0 -2.1 5 Jul 574.9 261.3 v high 220%
Menindee Post Office 25.2 -0.7 44.2 12 Jan 12.3 +1.0 0.2 7 Aug 437.2 242.8 v high 180%
Pooncarie Mail Agency 25.1   45.1 10 Jan 11.4   -0.8 17 Aug 554.0 267.5 v high 207%
Western (Upper Darling) (district 48)
Brewarrina Hospital 25.8 -1.8 40.6 27 Jan 13.0 +0.4 -2.5 29 Jun 722.0 415.5 v high 174%
Cobar Airport AWS 24.3   41.7 27 Jan 11.6   -3.0 29 Jun 583.4
Cobar MO 24.3 -0.9 42.4 12 Jan 12.5 -0.3 0.0 29 Jun 685.4 402.4 highest 170%
Lightning Ridge Visitors Information Cen 26.4   40.0 28 Jan 13.5   -3.5 30 Jun 847.0
Wanaaring Post Office 26.3   42.5 26 Jan     -1.2 29 Jun 594.2 279.8 v high 212%
Western (Southwest Plains) (district 49)
Balranald (RSL) 23.5 -0.8 44.5 11 Jan 10.7 +0.7 -0.8 17 Aug 691.6 322.6 v high 214%
Ivanhoe Aerodrome AWS 24.1   43.9 12 Jan 12.1   0.3 8 Jul 625.0
Ivanhoe Post Office 25.0 -1.0 44.7 12 Jan 11.2 +0.5 -2.0 8 Jul 727.1 304.2 v high 239%
Central Western Plains (South) (district 50)
Condobolin Airport AWS 23.9   41.3 12 Jan 10.6   -2.2 13 Jun 713.6
Peak Hill Post Office 23.7 -0.7 40.4 23 Jan 12.7 +0.8 -1.1 30 Jun 968.7 562.7 v high 172%
West Wyalong Airport AWS 22.8   41.3 12 Jan 10.3   -1.4 13 Jun 895.6
Central Western Plains (North) (district 51)
Coonamble Airport AWS 24.8   39.4 24 Jan 11.6   -2.5 30 Jun 1019.4
Nyngan Airport 24.9 -0.8 41.6 23 Jan 12.3 +0.6 -2.0 30 Jun 749.6 446.1 v high 168%
Trangie Research Station AWS 24.1 -0.4 41.1 26 Jan 11.5 +0.7 -3.3 29 Jun 894.0 501.3 v high 178%
Northwest Plains (West) (district 52)
Mungindi Post Office 26.8 -0.9 40.5 28 Jan     -2.0 29 Jun 771.1 506.5 v high 152%
Walgett Airport AWS 26.0   40.5 28 Jan 11.6   -5.2 30 Jun 815.2
Northwest Plains (East) (district 53)
Moree Aero 25.4   39.0 28 Jan 12.9   -3.3 28 Jun 649.8
Northwest Slopes (North) (district 54)
Barraba Post Office 24.1 -0.3 39.1 24 Jan     -5.6 30 Jun 826.0 689.3 high 120%
Northwest Slopes (South) (district 55)
Gunnedah Pool 24.8 -1.1 38.6 13 Jan 12.4 +1.5 -2.2 30 Jun 1004.5 620.2 v high 162%
Gunnedah Resource Centre 24.0 -0.5 37.3 24 Jan 12.8 +0.7 -0.7 29 Jun 1014.0 642.6 v high 158%
Quirindi Post Office 24.2 -0.4 38.6 13 Jan 10.0 +1.1 -4.6 30 Jun 883.7 686.0 high 129%
Tamworth Airport AWS 24.0   37.6 22 Jan 10.4   -4.1 30 Jun 1017.8
Woolbrook (Danglemah Road) 19.9 -0.6 33.0 24 Jan 7.0 +1.6 -8.5 30 Jun 1027.3 783.3 v high 131%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 19.3   32.6 24 Jan 6.9   -11.2 30 Jun 823.2
Armidale Airport AWS 18.5   32.3 24 Jan 8.0   -6.0 29 Jun 865.8
Glen Innes Ag Research Stn 18.8 -0.7 31.7 24 Jan 8.0 +0.7 -6.8 29 Jun 941.1 844.7 high 111%
Glen Innes Airport AWS 19.0   31.8 24 Jan 7.1   -9.9 29 Jun 1158.0
Glen Innes Post Office 19.6 -0.6 33.2 24 Jan 8.9 +1.6 -5.9 29 Jun 925.9 858.5 average 108%
Guyra Hospital 17.2 -0.4 31.0 24 Jan 6.9 +0.4 -5.0 29 Jun 1027.9 921.7 high 112%
Inverell (Raglan St) 23.0   35.3 27 Jan 8.8   -6.6 29 Jun 825.2
Tenterfield (Federation Park)     34.0 26 Jan 8.6 +0.6 -6.5 29 Jun 1016.3 851.1 high 119%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 21.4 -0.9 35.3 26 Jan 12.5 -0.1 2.8 30 Jun 1762.6 1263.0 v high 140%
Upper North Coast (district 58)
Ballina Airport AWS 24.5   36.8 18 Jan 15.2   4.5 28 Aug 2239.0
Byron Bay (Cape Byron AWS) 23.6   32.2 18 Jan 17.1   9.0 4 Jul 2105.0
Casino Airport 25.4 -1.4 38.6 26 Jan 14.5 +1.3 2.8 7 Aug 1448.0 1098.0 high 132%
Casino Airport AWS 24.8   38.3 26 Jan 14.3   1.9 30 Jun 1468.6
Evans Head RAAF Bombing Range AWS 24.3   37.8 15 Feb 15.7   5.6 30 Jun 1890.0
Grafton Airport AWS 25.1   37.6 26 Jan 13.3   -1.2 30 Jun 1351.8
Grafton Olympic Pool 25.7 -0.1 37.5 26 Jan 14.5 +0.8 1.0 30 Jun 1186.5 1069.3 average 111%
Grafton Research Stn 25.1   37.7 26 Jan 14.4   1.4 30 Jun 1081.0 995.9 average 109%
Lismore (Richmond Hill) 24.7   37.4 27 Jan 14.9   4.4 30 Jun 1663.0
Murwillumbah (Bray Park) 25.0 -0.8 37.2 18 Jan 15.4 +1.0 3.8 12 Jun 2102.6 1609.8 high 131%
Yamba Pilot Station 23.7 +0.4 30.6 17 Dec     5.7 30 Jun 1741.3 1461.2 high 119%
Lower North Coast (district 59)
Coffs Harbour MO 23.6 +0.3 33.2 10 Dec 14.7 +0.7 1.3 30 Jun 1995.4 1687.9 high 118%
Dorrigo (Old Coramba Rd) 19.4   32.3 26 Jan 10.3   -2.5 30 Jun
Kempsey (Wide Street) 24.8 -0.3 36.1 23 Feb 13.5 +1.4 1.8 22 Aug 1167.1 1214.7 average 96%
Kempsey Airport AWS 24.5   36.1 26 Jan 12.3   -2.0 30 Jun 1096.4
South West Rocks (Smoky Cape Lighthouse) 23.9 +0.7 33.0 23 Feb     6.9 3 Jul 1423.4 1486.4 average 96%
Manning (district 60)
Forster - Tuncurry Marine Rescue 22.8   34.0 23 Feb 14.7   5.8 30 Jun 900.3 1216.8 low 74%
Port Macquarie Airport AWS 23.7   35.1 23 Feb 13.3   1.0 30 Jun 1230.4
Taree Airport AWS 24.0   38.0 23 Jan 13.3   0.4 30 Jun 899.7
Yarras (Mount Seaview) 23.8 -0.5 39.4 23 Jan 12.9 +1.2 -1.0 30 Jun 2914.4 1681.0 highest 173%
Hunter (district 61)
Cessnock Airport AWS 23.7   41.4 23 Jan 11.2   -1.4 30 Jun 856.8
Cooranbong (Lake Macquarie AWS) 23.5   41.8 23 Jan 11.7   -2.8 30 Jun 965.4
Gosford (Narara Research Station) AWS 23.0 0.0 40.9 23 Jan 11.9 +0.8 -1.5 30 Jun
Jerrys Plains Post Office 24.7 -0.5 41.6 23 Jan 11.5 +0.9 -0.7 28 Jun 774.9 644.1 high 120%
Maitland Visitors Centre     42.0 23 Jan 12.3   -0.5 29 Jun 814.5
Mangrove Mountain AWS 21.6   39.2 23 Jan 11.6   0.2 22 Jul 828.0
Merriwa (Roscommon) 22.6   38.1 26 Jan 9.5   -4.6 28 Jun 947.2 602.1 highest 157%
Murrurundi Gap AWS 19.4   33.8 13 Jan 10.7   -0.3 16 Jul 975.8
Murrurundi Post Office 22.3 -1.1 36.9 13 Jan 9.3 +0.8 -3.6 29 Jun 1131.4 834.1 v high 136%
Nelson Bay (Nelson Head) 22.7 -0.2 34.9 12 Feb 16.1 +2.2 7.9 30 Jun 1127.1 1346.7 average 84%
Newcastle Nobbys Signal Station AWS 22.1 +0.3 39.6 23 Jan 15.5 +1.3 5.9 30 Jun 771.0 1126.4 v low 68%
Peats Ridge (Waratah Road) 21.9 0.0 39.8 23 Jan 12.0 +0.7 1.1 29 Jun 1157.4 1242.8 average 93%
Scone Airport AWS 23.6   37.9 13 Jan 10.2   -4.8 30 Jun 764.2
Singleton STP 24.2   41.8 23 Jan 11.2   -1.0 1 Jul 642.7
Williamtown RAAF 23.8 +0.8 42.2 23 Jan 12.8 +0.4 -1.8 30 Jun 952.0 1125.0 low 85%
Central Tablelands (North) (district 62)
Gulgong Post Office 22.3 -0.8 37.8 26 Jan 10.3 +0.7 -4.8 30 Jun 1114.7 651.6 v high 171%
Mudgee Airport AWS 21.4   37.0 26 Jan 9.1   -6.7 30 Jun 1152.4
Nullo Mountain AWS 15.6   30.8 12 Jan 8.1   -3.4 29 Jun 1535.2
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 20.0 +0.2 36.2 12 Jan 7.2 +0.5 -6.7 30 Jun 1080.6 638.0 v high 169%
Bathurst Airport AWS 19.7   35.9 12 Jan 7.5   -5.7 30 Jun 1067.4
Katoomba (Murri St) 17.2 +0.5 34.3 12 Jan 8.8 +0.8 -1.8 30 Jun 1705.0 1402.2 high 122%
Lithgow (Cooerwull) 17.8   34.2 12 Jan 7.3   -6.8 22 Jul 969.4 785.7 high 123%
Mount Boyce AWS 16.5   33.9 12 Jan 8.3   -3.0 29 Jun 1199.0
Oberon (Springbank) 16.0 -0.9 33.0 13 Jan     -5.6 28 Jun 1228.0 844.8 v high 145%
Orange Agricultural Institute 17.5 -0.5 32.5 23 Jan 7.7 +0.5 -4.2 30 Jun 1592.0 929.7 highest 171%
Orange Airport AWS 17.2   34.2 23 Jan 6.9   -5.4 30 Jun 1580.4
Orange Airport Comparison 17.5 -0.1 34.0 22 Jan 7.3 +1.1 -4.8 30 Jun 1528.6 898.0 highest 170%
Springwood (Valley Heights) 21.9   40.3 23 Jan 12.1   0.0 30 Jun 1289.0 1091.3 high 118%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 22.3 -1.4 36.1 24 Jan 8.3 +0.9 -7.0 30 Jun 1468.4 754.5 v high 195%
Coonabarabran Airport AWS 21.1   35.8 24 Jan 11.3   -0.5 28 Jun 1218.0
Dunedoo Post Office 23.1 -0.8 39.0 26 Jan 10.8 +1.2 -4.5 30 Jun 1130.2 616.4 v high 183%
Central Western Slopes (South) (district 65)
Cowra Airport AWS 22.6   40.7 22 Jan 9.4   -2.5 13 Jun
Cowra Airport Comparison 22.6 -0.5 41.2 22 Jan 9.6 +1.3 -2.9 28 Jun 954.0 597.3 v high 160%
Dubbo Airport AWS 23.2   39.6 26 Jan 10.7   -4.0 30 Jun
Forbes Airport AWS 23.3   41.1 12 Jan 10.0   -3.1 22 Jul 944.8
Parkes (Macarthur Street) 23.4 0.0 42.0 23 Jan 11.2 +0.3 -2.5 28 Jun 960.4 583.9 v high 164%
Parkes Airport AWS 22.6   41.0 23 Jan 10.0   -4.0 22 Jul 1087.8 644.2 highest 169%
Wellington (Agrowplow) 23.3 -1.1 39.0 26 Jan 10.4 +1.0 -4.3 30 Jun 1078.6 616.9 v high 175%
Metropolitan (East) (district 66)
Bankstown Airport AWS 23.4 +0.3 42.8 23 Jan 12.6 +0.6 -0.7 30 Jun 802.0 874.1 average 92%
Canterbury Racecourse AWS 22.9   42.3 23 Jan 12.6   -0.9 30 Jun 903.6
Holsworthy Control Range 23.4   42.7 23 Jan 11.7   -2.6 30 Jun 836.4
Parramatta North (Masons Drive) 23.4 +0.1 42.3 23 Jan 12.6 +0.4 1.0 30 Jun 932.1 962.1 average 97%
Sydney (Observatory Hill) 22.6 +0.9 41.3 23 Jan 15.0 +1.2 4.3 30 Jun 1153.8 1214.0 average 95%
Sydney Airport AMO 22.9 +0.7 42.5 23 Jan 14.9 +1.5 3.2 30 Jun 1040.2 1082.1 average 96%
Sydney Olympic Park (Sydney Olympic Pk A 23.6   42.9 23 Jan 14.3   2.0 30 Jun 956.8
Terrey Hills AWS 21.5   40.3 23 Jan 13.3   0.9 30 Jun
Metropolitan (West) (district 67)
Badgerys Creek AWS 23.4   43.0 23 Jan 11.3   -3.0 30 Jun 829.2
Horsley Park Equestrian Centre AWS 23.3   42.5 23 Jan 12.2   -1.8 30 Jun 713.6
Liverpool (Michael Wenden Centre) 23.8   42.6 23 Jan 11.7   -2.4 30 Jun 865.8
Prospect Reservoir 23.7 +0.6 42.5 23 Jan 12.7 +0.5 -0.8 30 Jun 866.8 870.9 average 100%
Richmond RAAF 23.7   43.3 23 Jan 11.4   -4.8 30 Jun 714.0
Illawarra (district 68)
Albion Park (Wollongong Airport) 22.3   41.0 23 Jan 12.0   -0.9 28 Jun 1057.8
Bellambi AWS 21.3   35.9 23 Jan 14.9   5.4 30 Jun 1151.0
Bowral (Parry Drive) 18.3 -0.5 35.4 12 Jan 9.0 +1.2 -3.0 28 Jun 1153.1 933.4 high 124%
Camden Airport AWS 23.7 +0.1 42.6 23 Jan 10.8 +0.6 -3.9 30 Jun
Campbelltown (Mount Annan) 23.8   42.8 23 Jan 11.0   -3.0 30 Jun
Jervis Bay (Point Perpendicular AWS) 20.5   35.5 23 Jan 14.5   6.4 8 Aug 1617.0
Nowra RAN Air Station AWS 22.1   40.2 23 Jan 11.7   1.5 18 Aug 1031.2
South Coast (district 69)
Batemans Bay (Catalina Country Club) 21.6   36.2 21 Feb 10.3   -1.5 29 Jun 1074.3
Braidwood Racecourse AWS 18.9   38.2 12 Jan 6.6   -5.2 28 Jun 859.4
Green Cape AWS 19.6   30.1 9 Jan 13.4   5.9 29 Jun
Merimbula Airport AWS 20.8   37.0 21 Feb 10.0   0.0 1 Jul 984.2
Montague Island Lighthouse 19.4 0.0 29.9 22 Jan 14.3 +0.5 5.6 14 Jun
Moruya Airport AWS 21.3   37.0 21 Feb 10.5   -3.0 29 Jun 985.4
Moruya Heads Pilot Station 20.5 +0.1 34.8 21 Feb 12.3 +1.0 2.8 29 Jun 1050.5 954.4 high 110%
Narooma Vmr 20.1   31.6 22 Jan 12.7   0.0 3 May 1310.4 914.3 high 143%
Nerriga Composite 19.4 +0.3 37.7 12 Jan 6.8 +0.3 -6.7 28 Jun 949.0 769.1 high 123%
Ulladulla AWS 20.3   36.9 23 Jan 13.5   5.0 29 Jun
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 19.2 +0.8 37.7 12 Jan 5.5 +0.7 -6.8 21 Jul 785.0 643.1 high 122%
Bombala AWS 17.4   37.3 12 Jan 5.7   -5.4 21 Jul
Canberra Airport 20.3   39.8 12 Jan 7.3   -5.0 28 Jun 959.6
Cooma Airport AWS 17.7   37.3 11 Jan 4.4   -9.2 29 Jun 627.4 499.7 high 126%
Cooma Visitors Centre 19.0 -0.4 38.9 10 Jan     -8.6 21 Jul 720.2 538.2 high 134%
Goulburn Airport AWS 19.2   37.7 12 Jan 6.8   -6.9 28 Jun 857.2
Goulburn TAFE 19.2 -0.5 37.0 12 Jan 8.0 +0.6 -4.7 28 Jun 914.2 626.2 highest 146%
Taralga Post Office 18.7 +0.6 37.0 12 Jan 6.3 +0.3 -6.9 28 Jun 966.5 803.4 high 120%
Tidbinbilla Nature Reserve 19.2 +0.2 37.0 12 Jan 7.4 +0.9 -5.5 29 Jun 1298.4 931.3 v high 139%
Tuggeranong (Isabella Plains) AWS 20.3   38.6 12 Jan 7.5   -6.7 29 Jun
Yass (Linton Hostel) 20.9 +0.2 39.0 12 Jan     -4.6 28 Jun 1024.9 649.4 v high 158%
Southern Tablelands (Snowy Mountains) (district 71)
Charlotte Pass (Kosciusko Chalet) 10.3 +0.5 26.0 11 Jan     -19.6 20 Jul 1971.7 1969.2 average 100%
Thredbo Village 13.7 +0.2 29.7 12 Jan 2.4 +0.5 -11.5 6 Aug 2625.3 1765.3 v high 149%
Southwest Slopes (South) (district 72)
Albury Airport AWS 21.9   42.4 12 Jan 9.7   -2.0 14 Jun 916.4
Cabramurra SMHEA AWS 12.1   29.1 22 Jan 5.1   -5.0 29 Jun
Hume Reservoir 21.9 +0.4 41.9 12 Jan 10.9 +1.0 0.2 14 Jun 1001.6 693.8 v high 144%
Khancoban AWS 20.7   41.1 12 Jan 7.7   -4.0 14 Jun 1333.6
Tumbarumba Post Office 19.4 -0.2 37.5 22 Jan     -5.0 13 Jun 1384.3 977.1 v high 142%
Wagga Wagga AMO 22.2 +0.1 42.9 10 Jan 9.9 +0.9 -3.2 22 Jul 1019.4 566.3 highest 180%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 21.3 +0.7 40.4 12 Jan 10.2 +1.1 0.1 22 Jul 1568.5 925.5 v high 169%
Cootamundra Airport 21.5   40.2 12 Jan 8.1   -5.0 13 Jun 1056.0
Gundagai (William St) 21.9   42.1 12 Jan 9.4   -3.4 28 Jun 1015.8
Quandialla Post Office 23.2 -0.5 41.4 12 Jan 10.8 +1.1 -1.8 28 Jun 871.9 536.9 v high 162%
Temora Airport 22.3   42.6 11 Jan 9.3   -2.9 21 Jul 748.8
Wyalong Post Office 23.3 -0.1 42.1 11 Jan 11.2 +1.1 -0.6 28 Jun 756.0 479.2 v high 158%
Young Airport 21.4   39.2 12 Jan 7.7   -4.7 28 Jun 1099.2
Riverina (East) (district 74)
Corowa Airport 22.4 -0.2 43.0 12 Jan 9.5 +0.6 -2.0 14 Jun 871.0 540.0 v high 161%
Deniliquin Airport AWS 22.6   44.6 11 Jan 9.9   -2.2 27 Jul 706.2
Narrandera Golf Club 22.9 -0.5 43.0 11 Jan 10.4 +0.5 -1.5 17 Aug 620.4 483.5 high 128%
Tocumwal Airport 22.3 -0.6 43.8 11 Jan 9.9 +0.3 -1.7 27 Jul 736.9 446.4 v high 165%
Riverina (West) (district 75)
Griffith Airport AWS 23.4 -0.5 43.3 11 Jan 10.9 +0.8 -1.2 30 Sep 605.4 393.7 v high 154%
Hay (Miller Street) 23.4 -0.9 44.2 10 Jan 10.8 +0.8 -1.2 8 Jul 739.0 366.8 v high 201%
Hay Airport AWS 23.6   44.8 11 Jan     -1.7 8 Jul 662.6
Hillston Airport 24.1 -0.2 43.0 10 Jan 10.9 -0.1 -1.5 8 Jul 815.6 366.3 highest 223%

Notes

A Annual 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 4 January 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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