NSW in May 2011: 4th coldest May nights on record

  • Below average rainfall
  • 6th coldest May on record
  • 4th coldest May on record for minimum temperatures

Rainfall

NSW recorded a statewide average rainfall of 33.2 mm during May, below the historical average of 47.1 mm but significantly wetter than May 2008 (12 mm). The drying conditions follow slightly below average rainfall during April associated with the declining influence of La Niña on Australian climate, with most of the state recording close to median rainfall during the month. The Murray Darling Basin also recorded below average rainfall during May, averaging 27.7 mm compared to the historical average of 42.3 mm.

Rainfall was highest along the coast, with the majority of rain falling in two main events. The first occurred as a cold front moved eastward into the state on the 22nd, bringing the only significant totals in inland NSW over the 23rd and 24th. Daily rainfall reached 46.2 mm at Parkes on the 23rd with large areas exceeding 25 mm, while up to 54 mm was recorded at Thredbo and in the Snowy Mountains on the 24th. As the cold front moved offshore, an East Coast Low developed in its wake, bringing daily totals of up to 143.8 mm at Newcastle on the 25th.

The second rainfall event occurred towards the end of the month, as a low pressure trough developed off the coast with an associated upper low. This brought significant rainfall to coastal regions, particularly on the 31st as daily totals exceeded 50 mm through much of the Hunter and Mid North Coast regions, reaching 122 mm at Katoomba (Murri St) and 114.2 mm at Gosford.

See a map of rainfall deciles.

Temperature

May temperatures in NSW averaged 12.0 °C, well below the historical average of 13.4 °C. This was associated with cool daytime temperatures and very cold night time temperatures, particularly in inland regions. This was the 6th coldest May on record for mean temperatures, and the coldest since 2006.

Maximum temperatures averaged 18.7 °C during May, 0.6 °C below the historical average of 19.3 °C. These were the coldest daytime temperatures in May since 2000, and the 12th coldest on record. Almost all of NSW had below average temperatures during May, particularly in the west of the state. Temperatures were particularly cold in coastal regions on the 30th during a heavy rainfall event, with record-breaking daily maximums at several coastal stations including Coffs Harbour.

Minimum temperatures were also well below average during May at 5.5 °C, 2 °C below the historical average of 7.5 °C. This was the 4th coldest May on record for minimums, and the coolest since 2006. Most of the state had temperatures more than 1 °C below average, with large areas recording minimums up to 3 °C below average, particularly in the Southern Tablelands. In comparison, minimum temperatures were well above average on the offshore islands, associated with warm sea surface temperatures, with both Lord Howe and Norfolk Islands recording average night time temperatures more than 2 °C warmer than the warmest mainland site at Byron Bay.

The cool temperatures during May were particularly linked to a very cold week between the 10th and 18th, as a high pressure system drove persistent southwesterly winds into the state, driving minimums as much as 10 °C below average between the 15th and 18th. Temperatures were particularly cold in the Snowy Mountains on the 10th, with up to 15cm of snow reported by major ski resorts.

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

Some sites had their lowest May temperature on record. Some sites had their lowest May mean daily minimum temperature on record.

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

Other phenomena

Strong winds were reported in the Metropolitan and Hunter regions associated with the East Coast Low on the 25th, reaching 111km/hr at Wattamolla AWS, resulting in minor damage in these regions.

Waterspouts were spotted off Avoca Beach associated with the rain event on the 30th, in addition to flash flooding in southern suburbs of Sydney.

Further information

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Extremes in May 2011
Hottest day 29.6 °C at Mungindi Post Office on the 2nd
Warmest days on average 22.6 °C at Mungindi Post Office
Coolest days on average 3.9 °C at Thredbo AWS
Coldest day -4.6 °C at Thredbo AWS on the 11th
Coldest night -9.0 °C at Woolbrook (Danglemah Road) on the 15th
Coolest nights on average -2.3 °C at Perisher Valley AWS
Warmest nights on average 16.6 °C at Norfolk Island Aero
Warmest night 20.2 °C at Norfolk Island Aero on the 25th
Warmest on average overall 19.0 °C at Norfolk Island Aero
Coolest on average overall 0.9 °C at Thredbo AWS
Wettest overall 400.2 mm at Newcastle (Merewether Pump Station)
Wettest day 143.8 mm at Newcastle (Merewether Pump Station) on the 25th
Highest wind gust 117 km/h at Thredbo AWS on the 23rd


Record lowest May daily maximum temperature
Lowest daily maximum
temperature
in May 2011 (°C)
Previous coolest
for May
Years of
record
Average for
May
Coffs Harbour MO 14.2 on the 30th 14.3 on the 31st in 1969 61 21.4
South West Rocks (Smoky Cape Lighthouse) 14.4 on the 30th 14.8 on the 31st in 1969 55 21.4
Yarras (Mount Seaview) 12.4 on the 30th 13.3 on the 31st in 1997 43 21.2
Kempsey (Wide Street) 13.0 on the 30th 15.5 on the 22nd in 1980 38 22.6
Broken Hill Airport AWS 11.0 on the 26th 11.2 on the 16th in 1995 22 19.0



Record lowest May mean daily maximum temperature
Mean daily maximum
temperature
for May 2011 (°C)
Previous coolest
for May
Years of
record
Average for
May
Murwillumbah (Bray Park) 22.2 22.4 in 1992 35 23.5
Peats Ridge (Waratah Road) 17.4 18.1 in 2001 29 19.1
Guyra Hospital 12.6 13.1 in 2001 26 14.5
Nelson Bay (Nelson Head) 19.0 19.2 in 1917 24 20.8



Record lowest May temperature
Lowest temperature
in May 2011 (°C)
Previous coolest
for May
Years of
record
Average for
May
Parkes (Macarthur Street) -1.5 on the 15th = -1.5 on the 30th in 2006 55 7.5
Grenfell (Manganese Rd) -2.0 on the 15th -1.7 on the 26th in 1967 44 6.3
Cessnock (Nulkaba) -1.6 on the 16th -1.4 on the 24th in 1982 34 8.5



Record lowest May mean daily minimum temperature
Mean daily minimum
temperature
for May 2011 (°C)
Previous coolest
for May
Years of
record
Average for
May
Prospect Reservoir 8.1 = 8.1 in 2008 45 10.0
Tabulam (Muirne) 8.6 9.1 in 1971 40 10.9
Nerriga Composite -0.1 0.8 in 2004 39 3.9
Goulburn TAFE 2.1 = 2.1 in 1982 34 4.7


Summary statistics for May 2011
Maximum temperatures
for May
(°C)
Minimum temperatures
for May
(°C)
Rainfall
for May
(millimetres)
Mean for
May
2011
Diff
from
average
Highest for
May
2011
Mean for
May
2011
Diff
from
average
Lowest for
May
2011
Total for
May
2011
Average
for
May
Rank of
May
2011
Fraction of
May
average
Western (Far Northwest) (district 46)
Fowlers Gap AWS 19.0   26.1 21st 6.0   0.1 17th 14.6
Tibooburra Airport 20.7   27.4 22nd 8.2   2.6 27th 2.2
Tibooburra Post Office 20.7 -1.2 27.2 22nd 8.1 -1.3 2.3 27th 3.2 18.1 average 18%
White Cliffs AWS 20.0   26.3 21st     3.3 27th 15.2
White Cliffs Post Office 19.9 -1.5 26.8 21st 6.5 -1.7 -0.2 16th 10.4 20.8 average 50%
Wilcannia (Reid St) 20.0 -1.2 27.7 21st 5.5 -2.4 -0.6 17th 18.6 23.7 average 78%
Wilcannia Aerodrome AWS 19.8   27.5 21st 5.3   -1.1 17th 19.2
Western (Lower Darling) (district 47)
Broken Hill (Patton Street) 17.3 -1.9 25.0 21st 7.9 -0.7 3.0 10th 17.8 22.5 average 79%
Broken Hill Airport AWS 17.1 -1.9 25.0 21st 6.0 -1.9 1.0 10th 16.6 20.7 average 80%
Lake Victoria Storage 18.1 -0.9 23.5 20th 7.1 -0.6 0.6 16th 14.5 23.7 average 61%
Menindee Post Office 18.5 -2.2 27.2 21st 7.4 -0.1 1.6 16th 16.6 22.8 average 73%
Pooncarie Mail Agency 18.8   26.1 20th 7.0   1.9 16th 16.0 26.1 average 61%
Western (Upper Darling) (district 48)
Brewarrina Hospital 21.8 -0.6 28.4 1st 6.9 -1.6 1.4 15th 1.0 30.9 low 3%
Cobar Airport AWS 18.6   26.2 1st 4.7   -2.2 15th 36.8
Cobar MO 18.7 -1.3 25.5 1st 6.7 -2.3 1.1 15th 45.6 33.2 high 137%
Collarenebri (Albert St) 21.6 -1.2 27.7 2nd 6.5 -1.9 -1.1 16th 23.5 35.3 average 67%
Lightning Ridge Visitors Information Cen 21.9   28.3 1st 7.5   1.6 16th 19.0
Wanaaring Post Office 21.1   28.4 1st 6.2   -0.2 17th 22.4 24.0 average 93%
Western (Southwest Plains) (district 49)
Balranald (RSL) 18.0 -1.4 25.1 21st 6.1 -0.7 -0.1 17th 10.6 31.5 low 34%
Ivanhoe Aerodrome AWS 18.9   26.3 21st 5.7   0.0 16th 21.8
Ivanhoe Post Office 19.3 -1.1 26.6 21st 4.4 -2.5 -2.5 17th 31.6 27.2 average 116%
Central Western Plains (South) (district 50)
Condobolin Ag Research Stn 18.6 -1.0 24.9 1st 5.0 -1.6 -2.0 18th 30.4 35.9 average 85%
Condobolin Airport AWS 18.2   25.2 1st 4.4   -2.3 18th 32.2
Peak Hill Post Office 18.8 -1.2 25.8 1st 6.6 -2.2 0.7 17th 58.0 45.0 high 129%
West Wyalong Airport AWS 17.6   23.2 21st 3.5   -2.3 17th 17.2
Central Western Plains (North) (district 51)
Coonamble Airport AWS 20.9   27.2 2nd 5.8   -0.5 18th 43.4
Nyngan Airport 20.1 -0.5 26.0 1st 6.7 -1.1 0.5 11th 30.0 36.4 average 82%
Trangie Research Station AWS 19.5 -0.3 25.3 1st 5.2 -2.0 -1.5 16th 46.4 37.6 average 123%
Northwest Plains (West) (district 52)
Mungindi Post Office 22.6 -0.5 29.6 2nd 7.0 -1.8 0.4 17th 32.1 34.9 average 92%
Walgett Airport AWS 21.7   27.8 1st 5.2   -3.0 16th 23.2
Northwest Plains (East) (district 53)
Moree Aero 21.1   26.7 1st 6.8   -0.8 15th 22.0
Northwest Slopes (North) (district 54)
Barraba Post Office 19.5 -0.9 24.0 22nd 1.9 -2.4 -5.9 17th 39.9 42.5 average 94%
Narrabri Airport AWS 21.0   25.2 22nd 6.4   -0.5 11th 38.8
Northwest Slopes (South) (district 55)
Gunnedah Airport AWS 20.3   24.9 22nd 4.2   -3.9 15th 50.6
Gunnedah Pool 20.5 -0.8 25.2 22nd 7.3 +0.2 -2.5 16th 53.8 42.5 average 127%
Gunnedah Resource Centre 19.7 -0.6 24.2 22nd 7.6 -1.1 0.7 15th 50.8 44.8 average 113%
Quirindi Post Office 19.6 -0.9 24.6 22nd 3.4 -1.7 -4.1 17th 66.6 44.6 high 149%
Tamworth Airport AWS 19.6   24.6 22nd 3.6   -3.6 15th 61.8
Woolbrook (Danglemah Road) 15.7 -1.3 20.2 22nd -0.4 -2.4 -9.0 15th 94.4 47.8 high 197%
Northern Tablelands (West) (district 56)
Armidale (Tree Group Nursery) 15.1   20.2 22nd 0.6   -7.2 15th 60.2
Armidale Airport AWS 14.2   19.0 22nd 2.3   -5.1 15th 74.4
Glen Innes Ag Research Stn 15.0 -1.3 21.0 1st 2.8 -1.8 -4.0 15th 74.0 49.3 high 150%
Glen Innes Airport AWS 15.1   20.8 1st 1.3   -5.3 17th 80.4
Glen Innes Post Office 15.7 -1.0 21.3 1st 3.7 -0.8 -2.5 15th 61.0 49.4 high 123%
Guyra Hospital 12.6 -1.9 17.1 22nd 2.2 -1.9 -2.3 15th 73.2 55.1 high 133%
Inverell (Raglan St) 18.7   23.0 1st 2.1   -4.8 15th 65.4
Inverell Research Centre 18.0 -1.2 21.9 20th 5.9 -1.6 0.9 17th 80.0 49.5 high 162%
Tenterfield (Federation Park) 16.9 -1.1 21.5 1st 2.4 -2.5 -5.0 15th 43.8 49.0 average 89%
Northern Tablelands (East) (district 57)
Tabulam (Muirne) 17.9 -1.1 21.8 2nd 8.6 -2.3 4.9 31st 96.8 102.8 average 94%
Upper North Coast (district 58)
Alstonville Tropical Fruit Research Stat 20.3 -1.0 23.4 3rd 11.7 -1.6 7.2 31st 66.6 181.7 low 37%
Ballina Airport AWS 21.3   24.5 8th 11.2   4.9 31st 80.2
Byron Bay (Cape Byron AWS) 20.2   23.6 23rd 13.7   10.7 13th 121.2
Casino Airport 22.1 -1.6 25.3 3rd 10.0 -0.6 5.3 13th 63.4 80.2 average 79%
Casino Airport AWS 21.8   25.3 3rd 9.8   4.5 13th 73.2
Evans Head RAAF Bombing Range AWS 20.9   25.0 8th 12.2   8.1 11th 51.0
Grafton Airport AWS 21.9   25.5 2nd 8.1   2.6 13th 48.8
Grafton Olympic Pool 22.4 -0.7 26.0 1st 9.9 -1.4 5.5 31st 67.3 81.9 average 82%
Grafton Research Stn 21.5   24.3 21st 10.2   5.6 31st 49.2 71.8 average 69%
Lismore (Richmond Hill) 21.5   25.4 3rd 11.2   5.5 31st 59.4
Lismore Airport AWS 21.9   25.9 3rd 9.1   4.1 13th 55.6
Murwillumbah (Bray Park) 22.2 -1.3 26.1 2nd 11.1 -1.5 3.9 14th 73.2 141.1 average 52%
Yamba Pilot Station 21.3 -0.4 24.6 8th 12.1 -1.2 7.9 15th 51.0 157.2 low 32%
Lower North Coast (district 59)
Coffs Harbour MO 20.7 -0.7 23.5 4th 10.6 -1.1 5.1 13th 91.8 159.4 average 58%
Dorrigo (Old Coramba Rd) 15.7   19.6 21st 6.0   0.9 11th 62.4
Kempsey (Wide Street) 21.4 -1.2 25.0 21st 9.3 -0.4 3.5 15th 47.4 92.0 average 52%
Kempsey Airport AWS 21.2   24.4 21st 7.7   1.5 12th 35.6
South West Rocks (Smoky Cape Lighthouse) 21.4 0.0 23.6 21st 13.2 -1.1 10.8 15th 67.8 133.6 low 51%
Manning (district 60)
Forster - Tuncurry Marine Rescue 20.2   23.0 23rd 9.8   5.8 11th 130.5 118.4 average 110%
Port Macquarie Airport AWS 20.4   23.0 21st 9.8   4.0 12th 69.6
Taree Airport AWS 20.2   23.6 23rd 9.6   4.4 11th 50.8
Yarras (Mount Seaview) 20.1 -1.1 23.9 8th 8.0 -1.4 3.0 15th 121.8 128.0 average 95%
Hunter (district 61)
Cessnock (Nulkaba) 20.5 -0.6 25.3 21st 6.5 -2.0 -1.6 16th 80.4 54.2 high 148%
Cessnock Airport AWS 19.7   24.3 21st 5.7   -3.2 16th 69.8 44.5 high 157%
Cooranbong (Lake Macquarie AWS) 19.8   23.8 21st 7.0   0.1 16th 98.8
Gosford (Narara Research Station) AWS 19.2 -1.2 24.2 21st 7.8 -0.6 1.1 16th 186.8 119.2 high 157%
Jerrys Plains Post Office 20.6 -0.7 25.7 22nd 5.4 -2.1 -0.4 16th 84.7 40.9 v high 207%
Maitland Visitors Centre 20.2   24.5 21st 7.1   -0.4 16th 91.6
Mangrove Mountain AWS 17.5   22.7 22nd 7.2   0.8 15th 61.4
Merriwa (Roscommon) 18.9   24.0 22nd 3.5   -3.8 16th 48.6 38.8 high 125%
Murrurundi Gap AWS 15.2   20.9 22nd 6.9   1.6 15th 64.8
Murrurundi Post Office 17.8 -1.4 23.3 22nd 3.4 -1.7 -4.5 15th 66.4 54.8 average 121%
Nelson Bay (Nelson Head) 19.0 -1.8 23.2 23rd 12.5 +0.6 10.0 11th 235.1 155.1 high 152%
Newcastle Nobbys Signal Station AWS 19.4 -0.6 24.1 21st 11.4 -0.6 7.5 16th 145.6 118.0 average 123%
Newcastle University 20.0   24.5 21st 9.2   3.8 16th 122.0
Norah Head AWS 18.6   22.1 23rd 11.7   8.1 12th 189.0
Paterson (Tocal AWS) 19.5 -1.2 23.6 21st 8.5 -1.2 1.3 16th 106.8 75.2 high 142%
Peats Ridge (Waratah Road) 17.4 -1.7 22.8 21st 8.3 -1.3 3.4 16th 108.8 98.3 average 111%
Scone Airport AWS 19.0   24.9 22nd 4.7   -2.9 15th 86.0
Singleton STP 19.9   24.5 21st 5.8   -3.0 16th 69.8
Williamtown RAAF 19.9 -0.4 24.0 23rd 9.1 -1.0 2.8 16th 147.8 115.0 average 129%
Central Tablelands (North) (district 62)
Gulgong Post Office 18.5 -0.6 24.0 1st 4.2 -2.2 -2.8 16th 59.4 45.3 high 131%
Mudgee Airport AWS 17.7   22.6 1st 1.9   -5.8 16th 50.2
Nullo Mountain AWS 11.8   16.9 21st 4.2   -0.6 12th 72.6
Central Tablelands (South) (district 63)
Bathurst Agricultural Station 15.5 -0.2 21.2 1st 0.9 -2.5 -5.5 15th 46.7 41.9 average 111%
Bathurst Airport AWS 15.1   20.9 1st 0.8   -5.2 15th 39.0
Katoomba (Murri St) 13.1 0.0 18.3 22nd 4.9 -1.2 -0.4 15th 148.6 102.9 high 144%
Lithgow (Cooerwull) 13.4   18.2 21st 1.4   -5.9 15th 51.2 52.9 average 97%
Mount Boyce AWS 12.0   18.0 22nd 4.3   -1.1 15th 58.2
Oberon (Springbank) 11.9 -1.2 17.7 1st 1.1 -1.5 -4.2 17th 57.2 60.7 average 94%
Orange Agricultural Institute 13.0 -1.2 18.5 1st 2.3 -2.4 -2.4 16th 74.6 68.7 average 109%
Orange Airport AWS 12.7   18.2 1st 0.9   -6.2 16th 66.4
Orange Airport Comparison 13.0 -0.9 18.8 1st 1.6 -2.0 -4.3 16th 64.4 62.5 average 103%
Springwood (Valley Heights) 17.6   21.0 23rd 8.4   3.5 16th 45.6 73.7 average 62%
Central Western Slopes (North) (district 64)
Coonabarabran (Namoi Street) 18.4 -0.9 23.2 1st 1.1 -2.2 -5.8 17th 59.2 54.0 average 110%
Coonabarabran Airport AWS 17.1   22.2 1st 7.3   1.3 15th 51.0
Dunedoo Post Office 19.1 -0.4 23.8 1st 4.7 -1.5 -3.7 16th 48.6 44.4 average 109%
Central Western Slopes (South) (district 65)
Cowra Airport Comparison 17.8 -0.9 23.6 22nd 3.0 -2.2 -3.6 16th 34.8 46.3 average 75%
Dubbo Airport AWS 18.8   24.3 1st 4.8   -2.4 15th 60.0
Forbes Airport AWS 18.2   24.4 1st 3.1   -3.2 17th 31.0
Parkes (Macarthur Street) 18.0 -0.6 24.5 1st 4.9 -2.6 -1.5 15th 61.0 47.2 high 129%
Parkes Airport AWS 17.1   24.0 1st 3.2   -3.2 15th 56.0 49.8 average 112%
Wellington (Agrowplow) 18.9 -0.9 24.4 1st 3.9 -1.9 -2.9 15th 46.2 47.4 average 97%
Metropolitan (East) (district 66)
Bankstown Airport AWS 19.4 -1.0 23.9 21st 8.0 -1.6 2.5 11th 82.8 71.1 average 116%
Canterbury Racecourse AWS 19.3   23.6 21st 7.9   2.0 11th 62.2
Holsworthy Control Range 19.3   23.7 21st 7.4   -0.1 11th 69.4
Parramatta North (Masons Drive) 19.4 -1.1 24.5 21st 8.4 -1.6 3.8 15th 131.8 73.5 high 179%
Riverview Observatory 18.9 -0.7 23.4 23rd 8.7 -1.2 5.1 11th 69.3 106.3 average 65%
Sydney (Observatory Hill) 19.5 +0.1 23.3 21st 10.7 -0.8 7.3 15th 135.6 121.2 high 112%
Sydney Airport AMO 19.1 -0.9 24.2 23rd 10.5 -0.4 6.6 15th 91.8 100.9 average 91%
Sydney Harbour (Wedding Cake West) 18.4   22.2 23rd 12.0   9.0 15th
Sydney Olympic Park (Sydney Olympic Pk A 19.8   25.0 21st 9.8   5.7 11th
Terrey Hills AWS 17.8   22.6 21st 9.0   4.7 12th 27.6
Metropolitan (West) (district 67)
Badgerys Creek AWS 19.7   24.1 21st 6.2   -0.1 16th 52.2
Horsley Park Equestrian Centre AWS 19.2   23.5 21st 7.6   1.6 16th 14.0
Liverpool (Michael Wenden Centre) 19.9   24.2 21st 6.9   1.2 11th 69.7
Penrith Lakes AWS 19.7   23.2 21st 7.8   2.6 12th 40.8
Prospect Reservoir 19.0 -1.3 23.0 21st 8.1 -1.9 2.7 15th 62.4 72.0 average 87%
Richmond RAAF 19.3   23.8 21st 5.8   -1.4 16th 50.2
Illawarra (district 68)
Albion Park (Wollongong Airport) 19.4   24.0 21st 7.2   1.8 16th 43.0
Bellambi AWS 18.5   24.1 21st 11.9   8.2 17th 93.2
Bowral (Parry Drive) 14.1 -1.4 19.4 22nd 4.2 -1.1 -0.2 7th 46.0 71.9 average 64%
Camden Airport AWS 19.6 -1.0 24.3 21st 5.1 -2.1 -1.3 16th 49.0 58.6 average 84%
Campbelltown (Mount Annan) 19.7   24.6 21st 6.1   -0.2 11th 54.8
Jervis Bay (Point Perpendicular AWS) 17.3   22.7 21st 11.8   8.4 12th 96.0
Kiama (Bombo Headland) 18.2   22.9 23rd 12.0   7.8 15th 100.2
Moss Vale AWS 14.1   19.6 21st 2.8   -3.0 18th 59.4
Nowra RAN Air Station AWS 18.3   23.6 21st 7.8   3.8 15th 52.2
South Coast (district 69)
Batemans Bay (Catalina Country Club) 18.7   22.0 19th 5.5   -0.4 12th 15.8 66.6 low 24%
Bega AWS 18.3   23.3 22nd 5.0   -0.1 16th 29.2
Braidwood Racecourse AWS 15.3   19.8 22nd -0.2   -6.8 15th 20.2
Green Cape AWS 16.9   20.6 21st 11.4   8.6 12th 41.6
Merimbula Airport AWS 18.5   22.9 23rd 7.2   2.9 16th 30.8
Montague Island Lighthouse 17.3 -0.8 20.9 21st 12.1 -1.0 8.6 6th 36.8 76.5 average 48%
Moruya Airport AWS 18.8   22.2 22nd 6.3   -0.7 12th 18.0
Moruya Heads Pilot Station 18.5 -0.6 22.0 21st 8.3 -1.1 4.4 15th 20.0 84.2 low 24%
Narooma Vmr 18.0 -0.7 21.5 21st 9.5 -0.6 6.0 6th 22.9 78.4 low 29%
Nerriga Composite 15.3 -0.4 20.5 22nd -0.1 -4.0 -6.4 15th 28.7 60.8 average 47%
Ulladulla AWS 17.6   22.4 21st 10.5   6.7 14th 83.2
Southern Tablelands (Goulburn-Monaro) (district 70)
Bombala (Therry Street) 13.7 -1.0 20.1 22nd 2.1 0.0 -3.9 18th 29.6 43.7 average 68%
Bombala AWS 12.1   18.6 22nd 2.2   -2.8 18th 21.4
Canberra Airport 15.8   20.9 1st 0.0   -6.9 15th 12.0
Cooma Airport AWS 12.4   17.9 22nd -0.4   -7.3 7th 30.2 28.6 average 106%
Cooma Visitors Centre 14.0 -1.6 20.0 1st -0.3 -1.2 -6.5 12th 30.3 31.8 average 95%
Goulburn Airport AWS 14.9   20.3 22nd -0.2   -8.1 15th 16.6
Goulburn TAFE 14.6 -1.4 19.8 22nd 2.1 -2.6 -2.1 6th 18.0 43.5 low 41%
Mount Ginini AWS 6.6   11.5 1st -0.1   -6.4 12th 72.2
Taralga Post Office 13.9 -0.5 19.1 21st 0.7 -2.6 -4.5 15th 43.9 59.8 average 73%
Tidbinbilla Nature Reserve 14.9 -0.4 19.8 1st 1.8 -2.0 -3.9 15th 44.6 66.0 average 68%
Tuggeranong (Isabella Plains) AWS 15.3   20.8 1st 0.8   -5.7 15th 24.6
Southern Tablelands (Snowy Mountains) (district 71)
Perisher Valley AWS 6.6   12.3 6th -2.3   -8.1 12th 132.0
Thredbo AWS 3.9 -1.1 9.5 6th -2.0 -0.7 -8.0 10th 134.6 109.6 average 123%
Thredbo Village 8.7 -1.4 13.4 7th -1.6 -1.2 -6.5 7th 126.0 150.8 average 84%
Southwest Slopes (South) (district 72)
Albury Airport AWS 16.3   22.3 2nd 3.9   -0.7 15th 32.6
Cabramurra SMHEA AWS 7.7   13.3 1st 1.5   -5.1 12th 91.2
Hume Reservoir 16.4 -0.3 22.5 22nd 5.4 -1.6 0.8 15th 35.8 58.7 average 61%
Khancoban AWS 14.9   20.7 1st 2.3   -2.1 10th 54.6
Tumbarumba Post Office 14.6 -0.6 19.5 22nd 0.8 -1.6 -3.5 15th 68.4 82.2 average 83%
Wagga Wagga AMO 16.8 -0.5 23.3 22nd 3.3 -2.6 -2.9 15th 31.8 50.9 average 62%
Southwest Slopes (North) (district 73)
Burrinjuck Dam 15.0 -1.1 22.5 1st 4.9 -1.5 1.8 16th 71.3 80.8 average 88%
Cootamundra Airport 16.1   21.7 21st 1.5   -4.0 15th 31.6
Grenfell (Manganese Rd) 16.7 -1.1 22.4 1st 3.1 -3.2 -2.0 15th 47.0 49.3 average 95%
Gundagai (William St) 16.1   21.7 1st 3.0   -2.9 15th 42.0
Quandialla Post Office 17.8 -1.3 23.4 1st 5.0 -1.4 -1.0 17th 32.6 43.3 average 75%
Temora Airport 17.3   23.7 1st 2.4   -4.0 17th 17.0
Wyalong Post Office 17.6 -1.1 23.5 21st 4.8 -2.0 -1.4 18th 18.6 39.1 low 48%
Young Airport 16.1   21.9 21st 1.6   -5.0 15th 47.2
Riverina (East) (district 74)
Corowa Airport 16.8 -1.0 23.0 22nd 3.6 -2.1 -0.2 10th 26.8 46.8 average 57%
Deniliquin Airport AWS 17.3   24.7 21st 3.8   -1.5 31st 9.6
Narrandera Airport 18.1   25.2 22nd 3.8   -2.8 17th 25.6 39.9 average 64%
Narrandera Golf Club 17.6 -1.2 24.1 1st 4.5 -2.3 -1.4 17th 41.5 41.0 average 101%
Tocumwal Airport 17.0 -1.4 24.0 21st 5.5 -1.3 0.8 29th 17.8 41.2 low 43%
Yanco Agricultural Institute 17.6   24.1 21st 5.5   0.0 17th 43.8 36.0 high 122%
Riverina (West) (district 75)
Griffith Airport AWS 18.1 -1.2 25.1 22nd 4.5 -2.7 -1.6 15th 36.2 35.7 average 101%
Hay (Miller Street) 18.5 -0.8 25.7 21st 4.7 -2.1 -0.8 17th 17.0 34.9 average 49%
Hay Airport AWS 18.6   25.7 21st 3.8   -2.2 17th 18.4
Hillston Airport 18.6 -0.7 26.0 22nd 4.3 -3.1 -2.0 15th 9.8 32.3 low 30%
Lake Cargelligo Airport 18.0 -2.2 25.4 22nd 5.6 -1.5 1.0 18th 28.2 36.2 average 78%
Offshore Islands (district 200)
Lord Howe Island Aero 20.8 -0.7 22.7 3rd 15.8 -0.6 9.9 28th 254.4 154.0 high 165%
Norfolk Island Aero 21.5 +0.6 24.2 2nd 16.6 +0.5 13.3 7th 114.6 132.3 average 87%

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 1 pm on Wednesday 1 June 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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