Western Australia in spring 2011: the second wettest spring for WA

  • Rainfall: 2nd wettest spring for WA; 8th wettest spring for SWLD
  • Maximum temperature: Near average for WA; above average for southwest WA
  • Minimum temperature: Near average for WA; 5th warmest spring for southwest WA

Rainfall

Rainfall during spring 2011 was above to very much above average across most of WA. Only small areas of the state recorded below average rainfall, in the west Kimberley, far west Pilbara, and eastern Eucla. When averaged across the state, spring 2011 was the second wettest spring on record (records commenced in 1900), only behind the spring of 1975, whilst the Southwest Land Division (SWLD) recorded its eighth wettest spring.

Middle level troughs were a significant feature of the WA weather in spring 2011, particularly in October and November, and were responsible for numerous periods of active thunderstorms and unseasonal rainfall events, which led to the second wettest spring on record for the state. Numerous sites in the Central Wheat Belt and Great Southern, as well as sites in the Central West, Goldfields, Gascoyne, Pilbara, and Kimberley recorded their wettest spring on record, with several of these having over 100 years of rainfall records. Of particular note was the spring total of 140.8 mm recorded at Kellerberrin in the Central Wheat Belt, its highest spring rainfall in 119 years, since records commenced in 1893. Also a large number of spring daily rainfall records were broken in October and November, in the Kimberley, Pilbara, Gascoyne, and SWLD.

In terms of climate drivers, it was notable that above average sea surface temperatures were evident in the Indian Ocean during spring 2011, and that the La Nina in the Pacific Ocean redeveloped during early spring, following one of the strongest La Nina episodes on record in 2010-11.

Maximum temperature

Mean maximum temperatures for spring 2011 were near average for much of WA. However, areas near the west coast and parts of the south coast saw above to very much average mean maxima, with temperatures up to 2 °C warmer than normal in the Eucla, Southwest, and Shark Bay region of the Gascoyne. In contrast, below to very much below average mean maximum temperatures were observed in the central and east Kimberley, northern Interior, coastal and east Pilbara, northern Goldfields, and southern Gascoyne, with maxima up to 2 °C cooler than normal in parts of these districts. Wyndham in the east Kimberley recorded its lowest mean maximum temperature for spring in 42 years of record with 36.8 °C, the result of lower than normal temperatures in September due to stronger than normal easterly winds, and cloud and rainfall impacting on solar heating in October and November.

When averaged across the state, spring 2011 was near average, but it was above average in the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay).

Minimum temperature

Mean minimum temperatures for spring 2011 were above to very much above average in western and southern parts of WA, with mean minima in the east coastal Eucla up to 3 °C above normal. As a result, Eucla, Pemberton, and Jurien Bay recorded their highest spring mean minima on record. In contrast, mean minimum temperatures were below to very much below average in Kimberley, and northern and central Interior. The northeast Kimberley saw mean minimum temperatures up to 3 °C cooler than normal, and Wyndham recorded its lowest spring mean daily minimum temperature in 42 years of record with 23.4 °C.

Wyndham also broke its record for lowest spring temperature when on 13 September it recorded a minimum of 13.5 °C. A strong high in the Bight brought cool air to the region from the south and allowed the overnight temperature to drop to its lowest spring value in 42 years.

When averaged across the state, spring 2011 was near average for WA, but was 5th warmest on record for the Lower Southwest.

 

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Extremes in spring 2011
Hottest day 44.0 °C at Wyndham Aero on 12 Oct
44.0 °C at Roebourne on 13 Nov
Warmest days on average 37.7 °C at Wyndham Aero
Coolest days on average 19.2 °C at Albany
19.2 °C at Shannon
Coldest day 11.0 °C at Mount Barker on 27 Sep
Coldest night -4.1 °C at Eyre on 24 Sep
Coolest nights on average 7.6 °C at Newdegate Research Station
Warmest nights on average 25.6 °C at Troughton Island
23.7 °C at Truscott (mainland)
Warmest night 29.2 °C at Troughton Island on 30 Nov
29.0 °C at Wyndham (mainland) on 8 Nov
Wettest overall 356.8 mm at Walpole
Wettest day 97.0 mm at Cossack on 2 Nov
Highest wind gust 124 km/h at Newman Aero on 20 Nov

Record highest spring daily rainfall
Highest daily rainfall
in spring 2011 (mm)
Previous highest
for spring
Years of
record
Yundamindra 50.0 on 27 Oct 44.2 on 22 Oct 1930 107
Wongan Hills 53.2 on 3 Oct 38.6 on 17 Nov 1983 104
Gibb River 71.0 on 17 Nov 65.5 on 20 Nov 1950 87
Mukinbudin 42.0 on 25 Oct 41.7 on 30 Nov 1947 83
Wongan Hills Res.Station 44.6 on 3 Oct 39.0 on 17 Nov 1983 75
Mount Vernon 64.4 on 21 Nov 44.6 on 22 Nov 2008 73
Albion Downs 37.0 on 22 Oct 35.6 on 27 Nov 1965 67
Wittenoom 44.8 on 2 Nov 41.0 on 12 Sep 2010 62
Cossack 97.0 on 2 Nov 39.9 on 21 Sep 1904 52
Swanara 51.0 on 4 Nov 50.5 on 18 Oct 1995 51
Tangadee 57.4 on 21 Nov 43.9 on 23 Nov 1973 50
Kenandra 37.5 on 25 Oct 34.0 on 6 Nov 1996 43
Denbarker 54.4 on 4 Nov 49.0 on 21 Nov 2008 41
Karratha Aero 37.8 on 2 Nov 15.4 on 15 Sep 2010 38
The Wold - Lowden 51.2 on 9 Oct 45.6 on 1 Oct 1978 38
Pindarita 36.0 on 3 Oct 35.0 on 18 Oct 1995 36
Wundi 50.0 on 3 Oct 36.0 on 21 Sep 1999 34



Record highest total spring rainfall
Total rainfall
for spring 2011 (mm)
Previous highest
for spring
Years of
record
Average for
spring
Kellerberrin 140.8 136.4 in 1904 119 56.4
Leonora 119.2 97.6 in 1919 114 30.8
Codg Codgen 149.6 137.7 in 1904 108 55.9
Wongan Hills 188.8 125.5 in 1973 104 61.2
Brookton 150.5 138.3 in 1926 103 78.2
Kokardine 108.2 107.7 in 1926 103 50.8
Ballidu 113.6 106.9 in 1973 101 53.1
Dalwallinu Comparison 129.5 125.3 in 1920 100 54.5
Belka 156.8 117.4 in 1996 99 53.4
Doodlakine 141.3 124.2 in 1983 96 53.6
Sandsprings 162.4 152.4 in 1903 95 72.1
Ardath 146.4 145.2 in 1932 93 58.7
Konnongorring 148.4 126.0 in 1917 85 58.4
Gibb River 343.2 270.8 in 2010 83 86.6
Kondut 106.1 101.7 in 1965 80 52.2
Hines Hill 141.0 131.6 in 1956 78 47.7
Latham 123.8 99.4 in 1973 76 40.5
Happy Valley 130.0 126.6 in 1999 75 58.5
Kalannie 118.0 86.7 in 1929 75 43.1
Ora Banda 117.8 105.1 in 1992 74 33.5
Wongan Hills Res.Station 174.2 118.0 in 1973 74 58.4
Woodanilling 189.5 184.8 in 1965 73 96.8
Mount Vernon 93.8 75.4 in 2008 72 14.7
Karlgarin 160.7 137.4 in 1971 67 61.8
Xantippe 103.8 96.8 in 1931 67 39.1
Goodlands 105.8 84.2 in 1975 61 45.2
Paynes Find 121.6 101.4 in 1992 49 36.1
Kojonolokan Hills 180.6 155.9 in 1965 45 83.1
Culford 192.8 191.6 in 1996 41 128.3
Jurien Bay 156.1 142.6 in 1997 41 89.1
Karratha Aero 38.0 20.8 in 2010 36 3.5
Newman Aero 91.6 85.4 in 2006 35 22.4
Karara 113.6 106.0 in 1992 33 44.7




Record lowest spring mean daily maximum temperature
Mean daily maximum
temperature
for spring 2011 (°C)
Previous lowest
for spring
Years of
record
Average for
spring
Wyndham 36.8 37.0 in 1999 42 38.3



Record lowest spring temperature
Lowest temperature
in spring 2011 (°C)
Previous lowest
for spring
Years of
record
Average for
spring
Wyndham 13.5 on 13 Sep 14.0 on 5 Sep 2003 44 25.3



Record highest spring mean daily minimum temperature
Mean daily minimum
temperature
for spring 2011 (°C)
Previous highest
for spring
Years of
record
Average for
spring
Eucla 12.7 12.6 in 2006 66 11.2
Pemberton 10.9 10.6 in 2006 66 8.8
Jurien Bay 13.4 13.2 in 2006 41 11.5



Record lowest spring mean daily minimum temperature
Mean daily minimum
temperature
for spring 2011 (°C)
Previous lowest
for spring
Years of
record
Average for
spring
Wyndham 23.4 23.7 in 1969 42 25.3



Summary statistics for spring 2011
Maximum temperatures
for spring
(°C)
Minimum temperatures
for spring
(°C)
Rainfall
for spring
(millimetres)
Mean for
spring
2011
Diff
from
average
Highest for
spring
2011
Mean for
spring
2011
Diff
from
average
Lowest for
spring
2011
Total for
spring
2011
Average
for
spring
Rank of
spring
2011
Fraction of
spring
average
North Kimberley (district 01)
Doongan 34.7 -1.7 40.2 12 Oct 19.1 -1.7 5.8 13 Sep 254.7 158.5 high 161%
Kalumburu 35.0 -1.7 38.5 28 Oct 20.5 -1.8 9.1 13 Sep 298.2 121.2 v high 246%
Mount Elizabeth 33.8 -1.7 38.9 14 Oct 17.6 -1.0 4.7 14 Sep 282.1 112.4 v high 251%
Troughton Island 31.1 -0.5 34.3 29 Nov 25.6 -0.5 20.7 14 Sep 18.8 12.6 high 149%
Truscott 33.7   37.5 26 Nov 23.7   15.8 14 Sep 63.8
Wyndham 36.8 -1.5 42.5 12 Oct 23.4 -1.9 13.5 13 Sep 74.6 80.3 average 93%
Wyndham Aero 37.7 -1.3 44.0 12 Oct 22.9 -1.7 10.9 12 Sep 79.2 78.1 average 101%
East Kimberley (district 02)
Argyle Aerodrome 35.9 -1.9 42.3 12 Oct 22.9 -1.7 12.9 12 Sep        
Halls Creek Airport 34.8 -1.7 40.9 30 Nov 20.5 -1.6 10.9 12 Sep 106.0 59.5 high 178%
Warmun 36.2 -1.8 42.0 12 Oct 21.3 -1.2 10.3 1 Sep 128.9 87.0 high 148%
West Kimberley (district 03)
Bidyadanga 33.6 -0.3 41.6 16 Oct 20.5 -0.3 11.2 16 Sep 1.3 9.8 average 13%
Broome Airport 32.7 -0.1 41.0 26 Nov 21.6 -0.4 10.5 14 Sep 1.0 11.8 low 8%
Curtin Aero 37.2 -1.2 42.5 26 Nov 20.1 -1.3 10.6 15 Sep 44.6 30.5 average 146%
Derby Aero 36.2 -0.6 42.2 30 Nov 21.2 -1.5 10.1 14 Sep 8.6 16.9 average 51%
Fitzroy Crossing Aero 37.2 -2.2 43.0 30 Nov 20.3 -2.2 9.2 12 Sep 103.0 49.6 high 208%
West Roebuck 35.0 -0.4 42.3 26 Nov 19.5 -1.2 8.5 12 Sep 2.4 14.2 low 17%
De Grey (district 04)
Karratha Aero 32.3 -0.8 40.3 13 Nov 19.4 -0.8 11.8 13 Sep 38.0 3.5 highest 1086%
Legendre Island 29.5   35.4 13 Nov 21.8   15.7 13 Sep
Mandora 34.2 -1.2 41.5 15 Oct         34.7 8.8 v high 394%
Marble Bar 36.9 -0.8 43.3 27 Nov 19.8 -0.8 11.0 14 Sep 10.8 17.1 average 63%
Pardoo Station 34.1 -0.9 39.5 25 Oct         3.0 6.8 high 44%
Port Hedland Airport 33.7 -0.7 40.6 19 Nov 18.2 -0.2 9.7 15 Sep 18.2 4.9 v high 371%
Roebourne 34.9 -0.5 44.0 13 Nov 19.0 -0.7 10.6 13 Sep 19.3 3.6 v high 536%
Roebourne Aero 34.8 -1.4 43.5 13 Nov 18.2 -1.0 8.7 13 Sep 28.2 8.5 high 332%
Fortescue (district 05)
Barrow Island Airport 28.7 -0.1 35.7 26 Nov 21.0 -0.2 16.0 13 Sep 1.0 5.7 high 18%
Learmonth Airport 32.6 +0.5 41.6 14 Nov 16.0 -0.2 8.6 13 Sep 0.2 5.8 average 3%
Mardie 33.3 -1.2 41.4 13 Nov 17.3 +0.1 9.7 13 Sep 25.0 3.8 v high 658%
Onslow 31.5 0.0 40.7 13 Nov 18.4 +1.7 12.0 4 Sep 0 3.6 lowest 0%
Onslow Airport 32.2 -0.1 41.0 13 Nov 18.2 +0.6 12.3 4 Sep 0.4 5.4 average 7%
Wittenoom 34.6 -0.2 41.0 18 Nov 19.8 -0.5 10.7 13 Sep 49.3 16.4 v high 301%
West Gascoyne (district 06)
Carnarvon Airport 27.4 +1.5 39.0 23 Nov 16.3 0.0 8.8 13 Sep 15.4 15.2 average 101%
Denham 26.4 +0.9 38.0 23 Nov 17.7 +1.2 12.3 8 Sep 16.8 17.1 average 98%
Emu Creek Station 33.8 -0.1 43.0 15 Nov         1.2 8.0 average 15%
Gascoyne Junction                 4.2 11.0 average 38%
Murchison 29.5 -0.7 38.5 16 Oct         28.4 18.8 high 151%
Shark Bay Airport 28.3 +0.3 38.6 23 Nov 15.0 -0.1 7.6 29 Sep 17.4 14.0 average 124%
East Gascoyne (district 07)
Newman Aero 33.1 -1.1 39.9 12 Nov 16.8 +0.2 6.0 13 Sep 91.6 22.4 highest 409%
Paraburdoo Aero 34.3 -0.7 42.0 14 Nov 17.6 0.0 7.7 12 Sep 8.0 15.5 average 52%
Murchison (district 07A)
Meekatharra Airport 28.8 -0.7 39.3 16 Nov 14.7 -0.4 5.9 3 Sep 49.2 23.0 high 214%
Mount Magnet Aero 27.6 -1.0 37.9 16 Nov 13.7 -0.3 5.5 28 Sep 50.4 26.7 high 189%
North Coast (district 08)
Carnamah 26.0 0.0 37.8 16 Oct 11.3 +0.7 3.5 28 Sep 105.0 55.4 v high 190%
Dalwallinu 25.1 -0.7 37.7 25 Nov 10.0 +0.3 1.9 28 Sep 125.8 49.0 v high 257%
Dalwallinu Comparison 25.0 -0.3 36.0 25 Nov 10.9 +0.5 3.9 28 Sep 129.5 54.5 highest 238%
Geraldton Airport 25.2   38.1 24 Nov 11.8   3.1 29 Sep 148.4
Geraldton Airport Comparison 25.0 +0.4 37.2 24 Nov 11.8 +0.5 3.6 24 Sep 126.2 61.1 v high 207%
Kalbarri 26.9 +0.8 38.6 23 Nov 13.1 +0.4 6.6 13 Sep 59.2 45.7 high 130%
Morawa Airport 26.9 -0.7 37.8 25 Nov 11.0 +0.2 3.1 29 Sep 61.6 42.6 high 145%
Mullewa 27.1 -0.1 38.0 16 Oct 12.1 +0.8 5.9 28 Sep 59.7 43.5 high 137%
North Island 24.0 +0.6 32.8 23 Nov 17.3 +0.2 10.9 17 Sep 85.6 39.3 v high 218%
Wongan Hills 24.7 -0.2 36.4 25 Nov 10.1 -0.1 2.5 28 Sep 188.8 61.2 highest 308%
Central Coast (district 09)
Badgingarra Research Stn 24.0 -0.4 37.1 24 Nov 10.4 +0.7 2.0 14 Oct 116.6 100.5 high 116%
Bickley 20.7 -0.4 34.0 24 Nov 10.6 +0.9 4.7 28 Sep 311.8 229.4 high 136%
Champion Lakes 22.6   35.1 24 Nov 12.9   4.3 28 Sep
Garden Island HSF 21.8   36.9 24 Nov 14.2   7.8 28 Sep 116.6 116.1 average 100%
Gingin Aero 23.9 -0.2 37.6 24 Nov 10.9 +1.6 3.8 24 Sep 196.6 141.4 high 139%
Gooseberry Hill 22.1 -0.8 35.5 24 Nov 12.1 +0.5 7.0 28 Sep
Gosnells City 24.3 +0.3 38.2 24 Nov         208.1 156.0 high 133%
Jandakot Aero 23.3 +0.4 37.3 24 Nov 11.2 +1.2 3.4 29 Sep 205.0 164.1 high 125%
Jurien Bay 24.5 +1.1 37.6 23 Nov 13.4 +1.9 7.0 8 Sep 156.1 89.1 highest 175%
Karnet 21.0 +0.1 34.1 24 Nov 10.0 +0.8 2.1 28 Sep 309.8 256.8 average 121%
Lancelin 23.8 +1.3 37.7 23 Nov 12.7 +0.5 5.0 8 Sep 93.0 105.9 average 88%
Medina Research Centre 23.5 +0.6 38.7 24 Nov 12.3 +1.5 4.7 28 Sep 149.5 149.9 average 100%
Pearce RAAF 23.4 0.0 37.8 24 Nov 11.4 +1.0 4.6 28 Sep        
Perth Airport 23.7 +0.9 37.2 24 Nov 11.7 +1.1 3.8 28 Sep 205.2 142.6 high 144%
Perth Metro 23.7 +0.5 37.2 24 Nov 12.4 +0.8 4.9 29 Sep 202.4 156.7 high 129%
Rottnest Island 21.1 +0.5 32.2 23 Nov 14.9 +0.8 10.3 28 Sep 149.4 112.9 high 132%
Swanbourne 23.3 +1.0 36.0 24 Nov 13.4 +0.9 6.8 28 Sep 179.6 149.2 high 120%
South Coast (district 09A)
Albany 19.2 +0.5 34.9 24 Nov 12.0 +1.3 6.0 24 Sep 216.8 225.4 average 96%
Albany Airport 19.4 +0.5 35.1 24 Nov 9.9 +0.6 2.5 24 Sep 260.6 205.4 high 127%
Bridgetown                 209.2 170.1 high 123%
Bridgetown Comparison 21.6 +0.6 34.5 24 Nov 8.3 +1.2 1.1 10 Sep 207.4 182.7 high 114%
Bunbury 21.6 +0.4 33.3 24 Nov 10.6 +0.8 1.0 28 Sep 161.8 136.0 high 119%
Busselton Aero 22.1 +0.8 32.6 24 Nov 9.6 +0.8 2.2 28 Sep 156.6 140.0 average 112%
Cape Leeuwin 19.6 +1.2 33.5 24 Nov 13.9 +1.1 8.8 28 Sep 189.8 193.6 average 98%
Cape Naturaliste 20.9 +1.8 29.7 23 Nov 12.2 +0.9 7.9 10 Sep        
Collie East 21.4   33.9 24 Nov 8.2   0.2 28 Sep  
Donnybrook 22.4 +0.8 35.9 24 Nov 10.1 +1.5 1.5 28 Sep 220.4 199.2 average 111%
Dwellingup 21.2 +1.0 34.4 24 Nov 9.6 +1.4 1.1 28 Sep 312.9 256.6 high 122%
Esperance 22.0 +0.9 38.3 25 Nov 11.7 +0.7 6.1 20 Oct 187.4 142.3 high 132%
Esperance Aero 22.1 +0.9 37.6 17 Oct 10.4 +0.5 4.2 11 Sep 192.2 139.6 high 138%
Harvey 21.8 +0.2 34.2 24 Nov 10.1 +0.1 2.4 28 Sep 249.0 200.1 high 124%
Hopetoun North 21.6 -0.1 36.2 25 Nov 11.4 +1.1 4.3 11 Sep 178.4 129.1 high 138%
Jarrahwood 21.6 +0.9 34.2 24 Nov 8.2 +0.5 0.2 11 Sep 200.6 203.9 average 98%
Mandurah 22.2   32.9 2 Nov 14.2   8.5 28 Sep        
Manjimup 20.0 +1.0 34.4 24 Nov 9.1 +0.6 3.8 23 Sep        
North Walpole 19.4   33.4 24 Nov 10.9   6.0 14 Sep  
Pemberton 20.1 +1.2 33.7 24 Nov 10.9 +2.1 6.1 30 Nov 323.3 280.6 average 115%
Rocky Gully 19.8 +0.4 34.3 24 Nov 8.9 +0.7 3.6 30 Sep 302.8      
Shannon 19.2 +0.2 32.8 24 Nov 9.0 +0.5 3.1 20 Oct 301.4      
Windy Harbour 19.7 +0.7 35.3 24 Nov         284.6 220.7 high 129%
Witchcliffe 20.5 +0.8 33.1 24 Nov 9.9 +0.4 2.8 11 Sep        
North Central (district 10)
Bencubbin 24.6 -0.4 36.5 25 Nov 10.9 +0.9 2.0 29 Sep 89.6 50.4 v high 178%
Cunderdin Airfield 24.9 -0.5 38.3 25 Nov 8.9 +0.7 -1.4 28 Sep 159.0 57.7 v high 276%
Merredin 24.9 +0.3 37.8 25 Nov 10.5 +0.7 0.6 28 Sep 101.8 58.1 v high 175%
Northam 24.4 +0.1 37.2 24 Nov 9.5 +0.1 0.3 28 Sep 128.8 74.1 v high 174%
York 23.9 -0.6 36.6 24 Nov 8.5 +0.8 0.0 12 Sep 140.1 76.1 high 184%
South Central (district 10A)
Beverley 24.0 -0.3 36.0 24 Nov 9.5 +1.1 0.6 28 Sep 169.8 74.8 v high 227%
Brookton 23.0 -0.2 35.8 24 Nov 8.9 +1.0 -0.8 28 Sep 150.5 78.2 highest 192%
Corrigin 23.3 +0.2 37.3 25 Nov 9.2 +0.8 0.9 29 Sep 128.2 67.4 v high 190%
Hyden 24.5 +0.1 38.6 25 Nov 9.3 +0.8 1.0 28 Sep 113.0 67.8 high 167%
Jacup 21.8 +0.3 37.0 25 Nov 8.7 +0.9 2.1 20 Oct 195.0 124.6 high 157%
Katanning 21.2 -0.4 34.8 24 Nov 8.3 +0.6 1.0 20 Oct 215.2 111.0 v high 194%
Katanning Comparison 21.1 -0.1 34.4 24 Nov 8.9 +0.9 2.0 10 Sep 208.2 103.9 v high 200%
Lake Grace 22.5 -0.5 37.5 25 Nov 9.6 +0.7 2.0 28 Sep 166.6 79.1 v high 211%
Lake Grace Comparison 22.5 -0.3 36.8 25 Nov 9.5 +0.6 1.7 28 Sep 157.6 71.9 v high 219%
Narembeen 24.7 +0.1 37.2 25 Nov 9.8 +0.8 2.0 29 Sep 99.1 60.7 high 163%
Narrogin 21.6 +0.2 34.6 24 Nov 9.2 +1.4 2.1 22 Sep 146.2 96.0 v high 152%
Newdegate Research Station 22.7 -0.2 38.0 25 Nov 7.6 +0.4 -1.8 10 Sep 150.4 78.7 v high 191%
Ongerup 21.4 +0.4 34.0 25 Nov 9.3 +0.9 2.6 28 Sep 168.8 97.4 v high 173%
Pingelly 22.3 +0.1 35.2 24 Nov 9.6 +0.9 0.9 28 Sep 128.2 80.8 v high 159%
Ravensthorpe 22.6 +0.3 36.6 25 Nov 10.1 +1.0 2.2 20 Oct        
Wagin 21.9 +0.1 34.6 24 Nov 8.9 +0.7 1.8 10 Sep 167.0 88.5 v high 189%
Wandering 21.6 -0.9 35.1 24 Nov 7.9 +1.3 0.4 28 Sep 148.4 100.7 high 147%
Eucla (district 11)
Balladonia 24.8 -0.2 36.7 17 Nov 10.0 +1.0 2.5 24 Sep 141.7 65.8 v high 215%
Eucla 24.6 +1.7 42.0 17 Nov 12.7 +1.5 4.3 4 Sep 69.2 58.7 average 118%
Eyre 23.8 +1.1 38.1 17 Nov 9.3 -0.7 -4.1 24 Sep 91.2 63.9 high 143%
Forrest 27.6 +0.7 41.1 17 Nov 10.8 +0.3 2.4 12 Sep 9.6 47.7 v low 20%
Red Rocks Point 23.1   41.0 17 Nov 13.1   4.9 4 Sep 79.8
South East (district 12)
Bulga Downs 28.3   40.5 26 Nov 12.3   3.5 29 Sep 88.6 26.9 v high 329%
Kalgoorlie-Boulder Airport 25.4 -0.3 38.6 26 Nov 11.8 +0.8 3.6 29 Sep 93.4 47.1 v high 198%
Laverton Aero 27.2 -0.5 38.5 17 Nov 13.2 -0.6 3.8 11 Sep        
Leinster Aero 28.1 -1.0 39.3 11 Nov 14.1 -0.4 5.2 4 Sep 75.0 35.6 high 211%
Leonora 28.2 -0.5 39.8 27 Nov 13.6 0.0 5.2 11 Sep 119.2 30.8 highest 387%
Leonora Aero 27.7   38.9 26 Nov 13.6   4.0 11 Sep 106.0
Munglinup West 22.9   37.7 25 Nov 9.5   3.4 11 Sep 119.2 109.2 average 109%
Norseman Aero 25.1 -0.4 37.4 17 Oct 9.7 +0.6 -0.1 29 Sep 61.0 62.4 average 98%
Salmon Gums Res.Stn. 23.9 +0.6 37.6 25 Nov 8.6 +0.8 -3.4 11 Sep 148.8 85.2 v high 175%
Southern Cross Airfield 25.0 -0.8 34.8 16 Nov 9.8 +1.0 0.2 29 Sep        
Yeelirrie                 36.3 24.3 high 149%
North East (district 13)
Carnegie 31.5 -0.6 39.6 27 Nov 15.0 -0.6 5.4 13 Sep 66.5 22.0 v high 302%
Giles Meteorological Office 30.5 -0.6 38.9 28 Nov 16.0 -0.6 4.2 11 Sep 125.0 54.9 high 228%
Telfer Aero 35.2 -1.2 40.9 28 Nov 19.2 -1.0 9.5 13 Sep 99.6 21.8 v high 457%
Warburton Airfield 30.7 -0.5 40.3 28 Nov 14.7 -0.4 1.9 29 Sep 134.4 45.4 v high 296%
Wiluna 29.7 -0.4 39.8 17 Nov 14.5 +0.7 3.5 26 Sep 82.9 22.9 v high 362%

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 Thursday 1 December 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 10 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.

Records in this summary are based on sites with at least 30 years of data.

For PDF files of Perth Metro climate statistics for other months, please click here for extremes and here for averages.

Further information

Media
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Enquiries