Western Australia in winter 2010: Extremely cold and dry winter for southwest WA

  • Near average rainfall for WA, but driest winter on record for southwest WA
  • Near average mean maximum temperature for WA
  • Above average mean minimum temperature for WA, but the 3rd coldest winter for southwest WA

Rainfall

Rainfall totals in winter 2010 in the Southwest Land Division (SWLD), and adjacent Goldfields and Gascoyne were below to very much below average with many sites in the western parts of the SWLD registering their driest winter on record (see winter rainfall totals & decile map). Averaged across Southwest WA (southwest of a line from Jurien Bay to Bremer Bay), winter 2010 was the driest winter since comparable records commenced in 1900, the result of the third driest June on record, a below average July, and the sixth driest August on record.

Similarly, when averaged across the entire SWLD, winter rainfall was second lowest on record, only slightly behind that of 2006. The winter months in the SWLD saw the fourth driest June on record, a below average July, and a below average August.

Some parts of the SWLD did however record significant rainfall during winter. Cape Riche in the South Coastal district recorded 88 mm on the 5th June to break its winter daily rainfall record, whilst Arena, near Mingenew, in the Central West recorded 42.0 mm on the 9th July to register its highest winter daily rainfall on record.

In contrast, above to very much above average winter rainfall was recorded over most of the Kimberley and adjacent Pilbara and Interior, the result of above average July and August rainfall. Country Downs in the west Kimberley recorded its wettest winter on record. A cloudband in mid-June produced some exceptionally heavy falls in the west Pilbara, with some sites recording daily totals over 100 mm and registering their wettest winter day on record. Another cloudband in early July produced unseasonally high rainfall in western and southern Kimberley regions, with daily falls over 70 mm reported and several sites recording their wettest winter day on record.

Maximum temperature

Winter mean maximum temperatures were near average over much of central and southern WA. However, above to very much above average mean maximum temperatures occurred in the north and west Kimberley, the Pilbara, and north and west Gascoyne, as well as western parts of the SWLD, with up to 2 °C above normal mean maxima in the west Kimberley, most of the west Pilbara, and the northern Gascoyne. Roebourne and Onslow in the Pilbara experienced their warmest winter on record.

Mean maximum temperatures were below average along WA's eastern border, up to 2 °C cooler than normal in the northeast Interior and southeast Kimberley (see winter maximum temperature decile map & anomaly map). When averaged over the whole state, winter 2010 was near average.

Minimum temperature

Winter mean minimum temperatures were above to very much above average in the Kimberley, Pilbara, Gascoyne, and Interior, with up to 4 °C above normal mean minima in the central Kimberley. Mardie and Onslow Airport on the west Pilbara coast recorded their warmest winter on record in terms of mean overnight temperatures.

In contrast, below to very much below average mean minimum temperatures were recorded in most of the SWLD, apart from most of the South and Southeast Coastal districts, with up to 3 °C cooler than normal mean minima in the Central Wheat Belt (see winter minimum temperature decile map & anomaly map). Several sites in the SWLD and Goldfields registered their lowest winter temperature on record in late June or early July, and several sites, mainly in the Central Wheat Belt and Great Southern recorded their coldest winter on record in terms of mean minimum temperature as a result of the particularly dry winter.

When averaged over the whole state, winter 2010 was above average, however, it was the third coldest winter in terms of mean minimum temperature when averaged over Southwest WA.

Further information

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Extremes in winter 2010
Hottest day 39.0 °C at Wyndham Aero on 20 Aug
Warmest days on average 32.5 °C at Wyndham Aero
Coolest days on average 15.0 °C at Rocky Gully
Coldest day 9.0 °C at Mount Barker on 18 Aug
Coldest night -6.8 °C at Eyre on 11 Aug
Coolest nights on average 2.0 °C at York
Warmest nights on average 24.1 °C at Troughton Island
20.4 °C at Truscott (mainland)
Warmest night 26.4 °C at Troughton Island on 2 Jun
26.2 °C at Kuri Bay on 3 Jun (mainland)
Wettest overall 477.8 mm at Forest Grove
Wettest day 135.0 mm at Ningaloo on 16 Jun
Highest wind gust 113 km/h at North Island on 9 Jul
111 km/h at Cape Naturaliste on 12 Jul (mainland)

Record highest winter daily rainfall
Highest daily rainfall
in winter 2010 (mm)
Previous highest
for winter
Years of
record
Ningaloo 135.0 on 16 Jun 129.0 on 5 Jul 1984 109
Cape Riche 88.0 on 5 Jun 78.0 on 2 Jul 1978 103
Winning 120.0 on 16 Jun 84.1 on 15 Jun 1948 73
Learmonth Airport 95.0 on 16 Jun 89.6 on 4 Jun 2002 58
Country Downs 74.4 on 6 Jul 56.0 on 7 Jul 1978 40
Dampier Downs 77.0 on 10 Jul 63.0 on 18 Jun 2005 38
Arena 42.0 on 9 Jul 41.4 on 26 Aug 1987 31
Nerrima 56.5 on 6 Jul 50.5 on 19 Jun 2005 31



Record highest total winter rainfall
Total rainfall
for winter 2010 (mm)
Previous highest
for winter
Years of
record
Average for
winter
Country Downs 151.8 149.4 in 1978 37 21.3




Record lowest total winter rainfall
Total rainfall
for winter 2010 (mm)
Previous lowest
for winter
Years of
record
Average for
winter
Bannister 171.6 174.4 in 1971 126 348.0
Beverley 98.4 104.3 in 1914 125 216.0
Jarrahdale 312.4 343.4 in 1976 125 641.0
Bridgetown Comparison 177.2 212.6 in 2001 123 412.9
Narrogin 118.4 131.3 in 1925 119 242.9
Greenbushes 209.0 235.4 in 2001 118 473.5
Gingin 154.0 203.4 in 1914 116 408.8
Marradong 193.8 204.0 in 2001 113 389.3
Nannup 261.4 306.1 in 1976 108 483.3
Westbourne 128.8 192.8 in 2001 108 326.3
Boyanup 228.4 311.4 in 1902 106 515.8
Brookton 103.8 115.7 in 1914 102 235.7
Corrigin 63.2 87.9 in 1971 101 168.5
Quairading 65.2 80.4 in 1969 100 173.7
Wickepin 94.0 96.4 in 1914 99 195.7
Lake Grace Comparison 65.0 65.2 in 2002 98 139.0
Tambellup 71.9 110.6 in 1940 98 185.9
Kondinin 58.1 73.5 in 1980 93 147.6
Manjimup 246.2 282.6 in 2001 93 487.6
Kulin 63.4 71.2 in 1980 87 155.5
Newbicup 134.2 147.6 in 2001 87 297.3
Narembeen 65.4 70.8 in 2006 84 144.0
Woodanilling 120.8 127.2 in 1984 76 213.4
Dwellingup 339.9 349.4 in 2001 75 677.8
Graham Rock 66.2 76.0 in 2006 75 139.2
Bulyee 76.6 89.1 in 1995 71 185.6
Waroona 275.0 313.9 in 1940 71 550.3
Pemberton 307.4 340.1 in 2001 69 571.2
Roelands 255.0 271.0 in 2001 69 492.1
Amrista Park 65.2 81.2 in 1971 55 147.3
Pearce RAAF 190.8 233.1 in 1971 55 377.2
Dandaragan West 178.8 190.0 in 1989 54 335.4
Wokalup 284.6 311.1 in 1976 53 510.2
Gordon River 137.3 151.6 in 1987 52 232.9
Gidgegannup 239.6 313.6 in 1989 47 507.5
Gosnells City 251.2 288.8 in 2006 47 462.3
Karnet 308.0 332.6 in 1994 44 625.1
Lancelin 140.0 230.6 in 2006 44 340.3
Roleystone 252.2 344.7 in 1976 43 539.1
Bickley 299.6 388.6 in 1989 42 594.6
Ferguson Valley 246.6 270.2 in 2001 38 478.0
Karragullen North 268.8 343.9 in 1971 38 575.4
Bindoon 195.8 220.0 in 1969 37 372.4
Swan View 226.4 283.7 in 1976 37 431.5
Jandakot Aero 247.0 284.6 in 2006 35 464.1
Jarrahwood 236.9 244.5 in 2001 35 486.2
Pickering Brook 283.5 382.9 in 1979 31 551.7




Record lowest winter daily maximum temperature
Lowest daily maximum
temperature
in winter 2010 (°C)
Previous lowest
for winter
Years of
record
Average for
winter
Telfer Aero 13.1 on 5 Jul 13.6 on 9 Jul 1986 37 26.3



Record highest winter mean daily maximum temperature
Mean daily maximum
temperature
for winter 2010 (°C)
Previous highest
for winter
Years of
record
Average for
winter
Roebourne 29.6 29.5 in 1996 90 27.6
Onslow Airport 27.8 27.7 in 2001 44 26.0




Record lowest winter temperature
Lowest temperature
in winter 2010 (°C)
Previous lowest
for winter
Years of
record
Average for
winter
Geraldton Airport -0.4 on 4 Jul 0.5 on 26 Jun 1973 69 9.8
Corrigin -4.0 on 26 Jun -3.8 on 20 Jul 1987 63 5.2
Norseman -4.6 on 27 Jun -3.1 on 21 Jul 1988 54 5.6
Narembeen -3.2 on 3 Jul -2.5 on 2 Jul 1982 42 5.6
Pingelly -2.5 on 3 Jul -1.6 on 12 Jul 2005 40 5.9



Record highest winter mean daily minimum temperature
Mean daily minimum
temperature
for winter 2010 (°C)
Previous highest
for winter
Years of
record
Average for
winter
Mardie 15.2 15.0 in 1996 53 12.6
Onslow Airport 15.5 14.8 in 2004 44 13.4




Record lowest winter mean daily minimum temperature
Mean daily minimum
temperature
for winter 2010 (°C)
Previous lowest
for winter
Years of
record
Average for
winter
Northam 3.2 3.4 in 2001 104 5.8
Corrigin 3.4 3.6 in 2008 61 5.2
Pearce RAAF 6.3 6.6 in 2001 49 8.7
Eyre 3.7 4.3 in 2006 47 6.3
Karnet 5.1 5.4 in 1966 44 6.6
Brookton 3.4 3.5 in 1989 42 4.9
Beverley 3.0 3.8 in 2001 40 5.4
Pingelly 4.5 4.6 in 1990 38 5.9
Wagin 4.4 4.5 in 2008 34 5.9



Summary statistics for winter 2010
Maximum temperatures
for winter
(°C)
Minimum temperatures
for winter
(°C)
Rainfall
for winter
(millimetres)
Mean for
winter
2010
Diff
from
average
Highest for
winter
2010
Mean for
winter
2010
Diff
from
average
Lowest for
winter
2010
Total for
winter
2010
Average
for
winter
Rank of
winter
2010
Fraction of
winter
average
North Kimberley (district 01)
Kalumburu 32.1 -0.2 36.1 25 Aug 16.7 +2.7 9.9 13 Aug 0.4 4.7 average 9%
Mount Elizabeth 29.6 +0.6 35.9 23 Aug 12.0 +3.2 5.1 23 Jun 11.0 18.7 high 59%
Troughton Island 29.4 +0.8 31.2 24 Aug 24.1 +1.4 21.3 2 Aug 1.2 12.0 average 10%
Truscott 30.9   34.3 31 Aug 20.4   15.8 13 Aug 3.0
Wyndham 32.1 +0.2 38.5 20 Aug 18.9 +1.1 14.0 13 Aug 1.4 7.4 high 19%
Wyndham Aero 32.5   39.0 20 Aug 18.3   12.0 5 Jun 0.4 7.5 average 5%
East Kimberley (district 02)
Argyle Aerodrome 30.1 -0.2 37.4 25 Aug 17.5 +1.2 13.1 7 Aug 6.8 6.7 high 101%
Halls Creek Airport 27.5 -0.6 35.7 23 Aug 15.3 +1.6 10.1 2 Jul 67.0 13.8 v high 486%
Kununurra Aero 31.0 -0.1 38.4 20 Aug 17.0 +1.3 11.0 14 Aug 5.6 5.8 high 97%
Warmun     38.0 25 Aug 15.9 +2.2 8.9 13 Aug 11.7 12.8 high 91%
West Kimberley (district 03)
Bidyadanga 31.0 +0.9 36.5 24 Aug 17.2 +2.5 11.0 7 Aug 87.2 30.8 v high 283%
Broome Airport 30.1 +0.7 35.2 24 Aug 17.2 +2.6 10.9 24 Jun 112.4 27.2 v high 413%
Curtin Aero 31.4 -0.2 37.4 24 Aug 17.7 +1.8 12.4 16 Aug 112.2 20.3 v high 553%
Derby Aero 30.8 -0.4 36.4 24 Aug 17.4 +1.8 12.6 21 Jun 153.0 17.4 v high 879%
Fitzroy Crossing Aero 31.2 -0.3 38.1 21 Aug 15.6 +2.9 8.4 8 Aug 83.4 19.1 v high 437%
West Roebuck 31.3 +0.2 36.8 24 Aug 16.2 +3.8 8.8 10 Aug 124.2 37.8 high 329%
De Grey (district 04)
Bedout Island 26.2   29.0 31 Aug 20.9   16.0 5 Jul
Karratha Aero 27.8 +0.9 34.0 30 Aug 16.5 +2.3 10.6 11 Jul 5.2 48.1 low 11%
Legendre Island 25.8   33.0 30 Aug 19.5   15.0 5 Jul
Mandora 30.1 +0.6 35.8 29 Aug     7.5 8 Aug 73.6 28.6 high 257%
Marble Bar 28.0   35.8 30 Aug 14.9   7.1 10 Aug 58.6 38.1 average 154%
Pardoo Station 29.4 +0.7 34.4 28 Jul 15.9 +2.2 10.0 11 Aug 46.3 38.8 average 119%
Port Hedland Airport 29.1 +1.2 34.5 18 Jun 15.9 +2.7 9.2 11 Aug 55.8 37.4 high 149%
Roebourne 29.6 +2.0 36.0 30 Aug 16.3 +1.8 11.1 10 Jul 8.1 47.9 low 17%
Roebourne Aero 29.1   35.2 30 Aug 15.1   8.6 11 Aug 61.2 37.2 average 165%
Fortescue (district 05)
Barrow Island Airport 24.7 +0.4 29.2 20 Jun 19.1 +1.2 14.7 14 Jul 18.0 39.0 average 46%
Learmonth Airport 25.5 +0.4 29.6 1 Jun 13.6 +1.4 6.1 25 Jul 158.6 77.4 v high 205%
Mardie 29.4 +1.0 34.9 30 Aug 15.2 +2.6 8.4 11 Jul 4.8 57.6 low 8%
Onslow 27.4 +1.8 32.6 20 Jun 15.9 +3.5 10.6 11 Jul 13.0 70.9 low 18%
Onslow Airport 27.8 +1.8 33.2 20 Jun 15.5 +2.1 10.3 11 Jul 13.6 73.9 low 18%
Tom Price 24.6 +0.7 32.5 30 Aug     4.0 15 Jul 19.0 50.9 low 37%
West Gascoyne (district 06)
Carnarvon Airport 23.6 +0.8 30.2 4 Aug 11.8 +0.2 4.5 2 Jul 82.6 111.3 average 74%
Denham 22.2 -0.1 29.0 2 Jun 13.9 +0.8 8.6 28 Jun 89.0 116.3 average 77%
Emu Creek Station 27.0 +0.8 32.0 29 Aug 14.1 +2.1 7.5 10 Jul 72.4 71.2 average 102%
Gascoyne Junction 24.5 +0.7 31.0 29 Aug 11.6 +1.7 3.7 7 Jul 42.3 72.1 low 59%
Shark Bay Airport 23.3   29.8 4 Aug 11.5   2.8 7 Jul 87.2 84.9 average 103%
East Gascoyne (district 07)
Newman Aero 24.0 +0.1 34.3 31 Aug 8.9 +2.3 0.9 2 Jul 21.0 35.7 average 59%
Paraburdoo Aero 26.3 +0.6 34.4 30 Aug 12.6 +2.3 4.5 25 Jul        
Murchison (district 07A)
Meekatharra Airport 20.4 +0.4 30.0 29 Aug 8.4 +0.2 2.4 2 Jul 25.6 63.9 low 40%
Mount Magnet Aero 19.4 -0.4 27.5 29 Aug 7.3 -0.3 0.5 28 Jun        
North Coast (district 08)
Carnamah 19.0 +0.4 25.0 5 Aug 6.9 -0.8 0.2 5 Jul 116.2 195.6 v low 59%
Dalwallinu 17.7 -0.1 25.0 28 Aug 5.3 -1.0 -0.2 4 Jul 102.2 114.6 average 89%
Dalwallinu Comparison 18.1 +0.3 24.9 28 Aug 5.6 -1.5 -0.3 26 Jun 112.7 169.5 low 66%
Geraldton Airport 20.3 +0.2 26.8 13 Jun 8.1 -1.7 -0.4 4 Jul 187.4 257.0 low 73%
Kalbarri 22.8 +0.6 29.9 4 Aug 9.6 -0.5 1.2 28 Jun 155.5 203.4 low 76%
Morawa Airport 19.3 -0.3 25.6 5 Aug 5.5 -1.1 -1.6 26 Jun        
Mullewa 20.1 +0.5 26.6 5 Aug 7.6 +0.1 1.9 2 Jul 151.6 167.6 average 90%
North Island 21.4   25.5 13 Jun 15.7   11.0 9 Jul 130.0
Wongan Hills 18.0 +0.4 25.7 28 Aug 5.6 -1.4 -0.8 25 Jun 102.8 192.8 v low 53%
Central Coast (district 09)
Badgingarra Research Stn 17.9 -0.3 24.5 4 Aug 6.6 -1.0 1.3 4 Jul 187.2 297.6 v low 63%
Bickley 15.8 +0.2 21.8 28 Aug 7.1 -0.4 2.4 25 Jun 299.6 594.6 lowest 50%
Champion Lakes 18.2   24.0 3 Aug 8.4   2.7 4 Jul 226.8
Garden Island HSF 17.9   23.0 13 Jun 10.4   5.8 25 Jun 222.6
Gingin Aero 18.8 -0.1 24.8 13 Jun 4.0 -2.7 -3.7 5 Jul 223.4 352.3 v low 63%
Gosnells City 19.4 +0.3 25.0 13 Jun 7.3 -1.8 0.5 26 Jun 251.2 462.3 lowest 54%
Jandakot Aero 18.8 +0.4 24.3 13 Jun 4.8 -2.3 -2.5 26 Jun 247.0 464.1 lowest 53%
Jurien Bay 20.4 +0.5 24.0 1 Aug 7.3 -2.4 1.6 5 Jul 168.1 310.1 v low 54%
Karnet 16.3 +0.5 22.0 3 Aug 5.1 -1.5 -1.0 25 Jun 308.0 625.1 lowest 49%
Lancelin 20.0 +0.5 24.7 13 Jun     2.5 27 Jun 140.0 340.3 lowest 41%
Medina Research Centre 19.1 +0.3 24.7 13 Jun 6.7 -1.8 0.0 26 Jun 259.6 414.5 v low 63%
Pearce RAAF 18.6 +0.3 24.7 28 Aug 6.3 -2.4 -1.9 4 Jul 190.8 377.2 lowest 51%
Perth Airport 19.0 +0.6 24.7 28 Aug 6.4 -2.0 -1.0 3 Jul 249.0 438.9 v low 57%
Perth Metro 18.8 0.0 24.6 13 Jun 6.4 -1.7 -0.6 26 Jun 256.4 407.1 v low 63%
Rottnest Island 17.7 -0.3 22.4 13 Jun 12.3 -0.3 7.9 10 Jul 252.2 307.7 low 82%
Swanbourne 18.9 +0.2 24.3 13 Jun 8.8 -1.3 2.9 25 Jun 284.2 391.3 v low 73%
South Coast (district 09A)
Albany 16.8 +0.6 22.5 28 Aug 8.9 +0.4 5.5 10 Jun
Albany Airport 16.3 +0.1 21.6 2 Aug 7.0 -0.7 0.9 10 Jun 308.0 333.0 low 92%
Bridgetown 16.4 +0.2 20.9 21 Jun 3.3 -1.6 -2.6 10 Jun 181.2 347.9 v low 52%
Bridgetown Comparison 17.3 +1.0 22.1 28 Aug 3.5 -1.2 -2.6 10 Jun 177.2 412.9 lowest 43%
Bunbury 17.9 +0.3 21.9 3 Aug 5.5 -2.1 -0.3 3 Jul 263.2 415.2 v low 63%
Busselton 17.4 -0.2 21.2 5 Aug 6.9 -1.5 1.5 3 Jul
Busselton Aero 17.1 -0.1 20.9 3 Aug 5.4 -1.8 -0.1 10 Jun 265.8 385.1 v low 69%
Cape Leeuwin 17.4 +0.7 21.3 13 Jun 11.8 +0.3 6.9 10 Aug 332.6 496.1 v low 67%
Cape Naturaliste 17.3 +0.6 21.0 2 Aug 10.2 -0.4 5.9 24 Jun 314.4 441.1 v low 71%
Collie East 17.4   22.7 28 Aug 2.8   -3.0 11 Jun 193.6
Donnybrook 17.8 +0.8 22.7 13 Jun 5.3 -0.8 0.0 3 Jul 256.2 527.1 v low 49%
Dwellingup 16.3 +0.8 21.5 3 Aug 4.0 -1.8 -2.0 25 Jun 339.9 677.8 lowest 50%
Esperance 17.6 0.0 23.9 28 Aug 8.5 -0.1 4.2 26 Jun 247.6 260.2 average 95%
Esperance Aero 16.4 -0.5 22.3 5 Aug 7.7 -0.2 3.5 3 Jul 184.0 216.4 average 85%
Harvey 17.8   22.5 14 Jun 6.6   1.0 30 Jun 275.2 433.2 v low 64%
Hopetoun North 17.9 -0.9 24.8 28 Aug 8.2 +0.2 3.4 11 Jun 156.2 168.9 average 92%
Jarrahwood 17.2 +0.5 21.5 3 Aug 3.2 -2.1 -3.2 10 Jun 236.9 486.2 lowest 49%
Mandurah 17.9   21.5 4 Aug 9.9   4.9 25 Jun 272.6
Manjimup 15.7 +0.9 21.3 11 Aug 6.1 -0.7 2.0 3 Jul 246.2 487.6 lowest 50%
North Walpole 16.4   21.6 11 Aug 8.7   3.7 11 Jun
Pemberton 16.3 +0.9 21.0 11 Aug 7.0 -0.5 2.6 11 Jun 307.4 571.2 lowest 54%
Rocky Gully 15.0 -0.1 20.5 2 Aug 6.1 -0.9 1.4 25 Jun 203.4 269.3 v low 76%
Shannon 15.2 -0.1 20.1 11 Aug 6.2 -0.7 1.8 9 Aug        
Windy Harbour 17.3 +0.2 22.3 11 Aug 8.8 -0.2 1.6 10 Jun 408.5 528.8 v low 77%
Witchcliffe 16.9 +0.1 20.8 2 Aug 6.9 -1.5 -0.7 10 Jun 468.6 493.4 average 95%
North Central (district 10)
Bencubbin 17.5 +0.4 25.9 28 Aug 5.4 -1.0 -1.7 26 Jun 62.0 132.5 v low 47%
Cunderdin Airfield 17.8 +0.2 27.0 28 Aug 2.9 -2.0 -3.7 5 Jul 77.0 130.9 v low 59%
Merredin 17.4 +0.5 25.7 28 Aug 4.3 -1.6 -2.5 27 Jun 89.0 139.9 low 64%
Northam 18.0 +0.4 25.6 28 Aug 3.2 -2.6 -3.5 26 Jun 122.0 224.4 v low 54%
York 17.9 +0.2 25.6 28 Aug 2.0 -2.1 -4.2 7 Jul 100.7 192.0 v low 52%
South Central (district 10A)
Beverley 18.0 +0.6 25.4 28 Aug 3.0 -2.4 -3.2 26 Jun 98.4 216.0 lowest 46%
Brookton 16.7 +0.1 23.7 28 Aug 3.4 -1.5 -2.9 26 Jun 103.8 235.7 lowest 44%
Corrigin 16.6 +0.6 25.4 28 Aug 3.4 -1.8 -4.0 26 Jun 63.2 168.5 lowest 38%
Hyden 18.1 +1.1 26.0 28 Aug 3.8 -1.2 -4.0 25 Jun 69.5 138.7 v low 50%
Jacup 16.4 +0.1 24.1 28 Aug 5.3 -0.5 0.8 23 Aug        
Katanning 15.4 +0.1 21.3 28 Aug 5.5 -0.7 -0.2 25 Jun
Katanning Comparison 16.0 +0.8 22.5 28 Aug 4.6 -1.2 -2.4 11 Jun 139.1 215.1 v low 65%
Lake Grace 16.2 -0.2 24.6 28 Aug 4.6 -1.1 -1.3 23 Aug 74.4 104.6 low 71%
Lake Grace Comparison 16.3 +0.2 24.6 28 Aug 5.0 -1.0 -1.3 23 Aug 65.0 139.0 lowest 47%
Narembeen 17.4 +0.2 25.5 28 Aug 4.6 -1.0 -3.2 3 Jul 65.4 144.0 lowest 45%
Narrogin 15.7 +0.6 23.0 28 Aug 4.0 -1.6 -1.6 25 Jun 118.4 242.9 lowest 49%
Newdegate Research Station 15.9 0.0 23.6 28 Aug 3.8 -0.6 -2.0 26 Jun
Ongerup 15.8 +0.3 22.8 28 Aug 5.3 -0.8 -0.4 25 Jun 133.8 142.0 average 94%
Pingelly 16.5 +0.7 23.9 28 Aug 4.5 -1.4 -2.5 3 Jul 103.0 226.7 v low 45%
Ravensthorpe 16.7 -0.2 23.2 28 Aug 6.7 -0.3 2.1 3 Jul 108.1 134.8 low 80%
Wagin 16.2 +0.3 22.8 28 Aug 4.4 -1.5 -1.2 11 Jun 118.5 201.6 v low 59%
Wandering 16.4 +0.1 22.9 28 Aug 2.5 -1.6 -2.9 11 Jun 185.8 261.4 v low 71%
Eucla (district 11)
Balladonia 18.2 0.0 29.6 29 Aug 4.8 -0.5 -2.3 26 Jun 63.8 67.8 average 94%
Eucla 18.1 -0.5 31.4 30 Aug 7.0 -0.6 1.8 5 Jul 109.4 81.6 high 134%
Eyre 18.9 +0.1 29.7 29 Aug 3.7 -2.6 -6.8 11 Aug 88.6 104.2 average 85%
Forrest 18.1 -1.4 31.0 30 Aug 5.0 -0.6 0.0 11 Aug 48.0 50.9 average 94%
Red Rocks Point 17.9   32.4 30 Aug 7.3   2.1 11 Aug 128.0
South East (district 12)
Bulga Downs 20.5   29.2 29 Aug 5.6   -1.7 2 Jul 37.2 65.3 low 57%
Kalgoorlie-Boulder Airport 17.5 -0.1 25.1 29 Aug 5.4 -0.2 -1.6 27 Jun 32.8 74.6 low 44%
Laverton Aero 18.3 -0.7 29.7 30 Aug 6.9 +0.4 -0.3 4 Jul 34.8 40.5 average 86%
Leinster Aero 19.0 -0.7 30.5 30 Aug 6.6 -0.3 -0.5 2 Jul 34.4 44.8 average 77%
Leonora 18.9 -0.5 29.2 29 Aug 6.6 -0.2 0.5 28 Jun 56.6 59.8 average 95%
Leonora Aero 18.9   29.0 29 Aug 6.5   -0.9 2 Jul 47.8
Munglinup West 16.5   23.4 28 Aug 6.8   2.0 3 Jul 113.0
Norseman 17.9 +0.4 27.1 29 Aug 4.2 -1.4 -4.6 27 Jun 50.7 82.3 low 62%
Norseman Aero 17.5 -0.7 27.3 29 Aug 3.2 -1.1 -6.0 27 Jun 41.8 58.1 low 72%
Southern Cross Airfield 17.4 -0.2 25.2 28 Aug 2.9 -0.7 -4.2 27 Jun 62.0 91.6 low 68%
North East (district 13)
Balgo Hills 25.7 -1.5 34.1 21 Aug 13.6 +0.5 7.0 10 Aug 127.0 21.6 v high 588%
Carnegie 21.7 -0.3 35.0 31 Aug 7.2 +0.6 -1.2 2 Jul 22.5 34.6 average 65%
Giles Meteorological Office 20.3 -0.7 28.0 31 Aug 8.1 +0.2 2.3 14 Jul 44.4 39.9 average 111%
Telfer Aero 26.2 -0.1 34.5 31 Aug 13.4 +1.8 7.0 11 Aug 66.4 31.7 high 209%
Warburton Airfield 21.1 -0.4 32.2 31 Aug 7.8 +1.4 0.1 14 Jul 19.4 41.9 average 46%
Wiluna 20.4 +0.1 31.0 30 Aug         35.6 49.3 average 72%

Notes

A Seasonal Climate Summary is prepared to list the main features of the weather in Western Australia 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 September 2010. 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 10 years of record.
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.

Further information

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