Western Australia in winter 2011: Warm in the southwest

  • Rainfall: Near average for WA; below average in southwest WA
  • Maximum temperature: Above average for WA; 8th warmest on record for southwest WA
  • Minimum temperature: Above average for WA; 9th warmest on record for southwest WA

Rainfall

Rainfall during winter 2011 was above to very much above average in a band extending from the southern Gascoyne, through the Goldfields and into the southern Interior and Eucla, mainly due to a middle level low in June and a number of cloudbands in July. In contrast, below average rainfall was observed in western and southeastern parts of the Southwest Land Division with very much below average rainfall recorded in the South Coastal and Southeast Coastal districts. Below average rainfall was also observed over winter 2011 in parts of the Kimberley, although rainfall during this time is typically low.

When averaged across the state, winter 2011 was near average for WA, but below average for the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) based on records commencing in 1900. Winter 2011 in the Lower Southwest was marginally above average when compared to the past thirty years, and a markedly better season than 2010 which was the driest on record. The below average winter rainfall for 2011 in the Lower Southwest was a culmination of receiving slightly below average rainfall in all three winter months.

Selected significant rainfall events for winter 2011 in WA:

  • A cloudband over the Pilbara produced heavy rainfall on 6 and 7 June, particularly at Onslow which observed 30.4 mm in the 24 hours to 9am on the 6th, followed by 70.4 mm in the 24 hours to 9am on the 7th. The rainfall total over the two days was more than twice the June monthly average rainfall at Onslow. Onslow Airport and Exmouth Town observed 64.6 mm and 53.2 mm respectively in the 24 hours to 9am on the 7th.
  • A middle level low over the southeast of the state resulted in significant rainfall in the Eucla on the 7 and 8 June, with Kybo recording 37.0 mm in the 24 hours to 9am on the 7th, and Arubiddy recording 32.4 mm in the 24 hours to 9am on the 8th, which are winter records for those sites.
  • Heavy rainfall was observed in the SWLD on the afternoon of 24 June and into the morning of the 25th as a strong cold front crossed the WA west coast, with widespread falls of 25 to 50 mm in southwest parts of the division, and isolated heavier falls of 50 to 70 mm in the Lower West and parts of the Southwest. Wokalup in the Southwest district broke its highest June daily rainfall record with 66.2 mm in the 24 hours to 9am on the 25th, while Worsley Downs observed 70.0 mm and Dwellingup 68.0 mm during the same event. Swanbourne recorded 32.6 mm in 30 minutes in the late afternoon of the 24th, which equates to a one in 50 to 100 year event, whilst Swanbourne's 24 hour rainfall total of 63.8 mm to 9 am on the 25th exceeded its previous highest daily total for June in 18 years of record, which was 53.0 mm on 4 June 2002.
  • The passage of a strong cold front across the SWLD on 28 June produced severe wind gusts, heavy rain and abnormally high tides. A number of severe wind gusts were observed, mainly in coastal parts of the Southwest district where Cape Naturaliste recorded a gust of 130 km/h, the highest wind gust recorded in winter 2011 in WA. The highest rainfall observed was 49.4 mm in the 24hrs to 9am on the 28th at Myalup, whilst Bedfordale recorded 54.4 mm in the 24 hours to 9am on the 29th. A number of homes in the Southwest and Lower West received minor structural damage as a result of the winds, particularly in Quindalup (near Busselton), Mandurah and Rockingham, and at least one house reportedly received major damage.
  • Milly Milly in the Gascoyne observed its wettest July day in 101 years of record with 50.0 mm on the 10th as an intense cloudband developed over WA, while Glen Station (near Cue) recorded 40.0 mm on the 10th, its highest daily fall in winter since records commenced in 1982. Wynyangoo (near Mount Magnet) observed its wettest July in 48 years of record as a consequence of the cloudband and other rainfall events during the month that resulted in 12 rain days at the station.
  • A series of cold fronts brought moderate to heavy rainfall to southwest WA from the 13 to 15 August. Cape Leeuwin observed its second wettest August day on record, and the wettest day in winter 2011 for WA, with 79.0 mm to 9am on the 14th. Most of this rainfall fell in the afternoon of the 13th as a slow moving line of heavy showers moved over the capes and Cape Leeuwin observed 49.2 mm in just two hours, which is a one in over 100 year event.
  • Widespread heavy falls occurred on 21 August and early on the 22nd, when a strong cold front moved across southwest WA. Many locations registered daily totals over 50 mm, and Westbourne in the Southwest district, and Frankland in the Great Southern experienced their wettest winter day on record.

Maximum temperature

Mean maximum temperatures for winter 2011 were above to very much above average across much of WA, with up to 2 °C warmer than normal maxima in many districts. Manjimup in the Southwest and Bidyadanga in the west Kimberley experienced their warmest winter on record. In contrast, mean maximum temperatures were below average in the north and east Kimberley, with up to 2 °C cooler than normal maxima in the east Kimberley.

When averaged across the state, winter 2011 was above average, whilst in the Lower Southwest of WA it was 8th warmest winter since comparable records commenced in 1950.

Bulga Downs in the southern Gascoyne endured two very cold days with daily maximum temperatures of 8.9 °C on both 10 and 11 July due to a cloudband over much of the state. These were the coldest days for winter 2011 in WA. Jurien Bay also recorded its coldest winter day in 42 years of record on 10 July with a maximum of 13.0 °C, breaking the previous record of 13.2 °C set on 8 June 1993. Conversely, some unseasonally warm days in the Pilbara in August saw Onslow record a maximum of 35.5°C on 28 August, which was its warmest winter day in 52 years of record, 1.5 °C above the previous record of 34.0 °C set on 30 August 1988.

Minimum temperature

Mean minimum temperatures for winter 2011 were above to very much above average in the southern half of WA, with mean minima in the Goldfields and Eucla districts up to 3 °C above normal. Several sites in the eastern Great Southern, Goldfields, and Eucla set new records for winter in terms of mean minimum temperature. In contrast, mean minimum temperatures were below to very much below average in the north and east Kimberley, and northern Interior. Parts of the northeast Kimberley saw mean minima up to 3°C cooler than normal.

When averaged across the state, winter 2011 was above average for WA, and was 9th warmest on record for the Lower Southwest.

The north Kimberley and inland Pilbara experienced very cold nights in the middle to latter part of June. Wyndham in the north Kimberley observed its coolest night on record for any month, with 8.3 °C on 14 June, breaking the previous record of 8.6 °C on 29 June 2004, and Telfer in the east Pilbara recorded 2.1°C on the same night, its coldest winter night in 38 years of recording. In contrast, the west Pilbara and the Southeast Coastal recorded a number of very warm nights in the middle and latter part of August. Emu Creek Station recorded a minimum of 21.9 °C on 14 August, its warmest winter night in its 40 year recording history, whilst Ravensthorpe in the Southeast Coastal recorded a minimum temperature of 18.4 °C on 22 August, 1.4 °C above the previous warmest night on record set on 7 August 2006.

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Extremes in winter 2011
Hottest day 37.0 °C at Curtin Aero on 29 Aug
Warmest days on average 31.7 °C at West Roebuck
Coolest days on average 15.6 °C at Katanning
Coldest day 8.9 °C at Bulga Downs on 10 Jul
8.9 °C at Bulga Downs on 11 Jul
Coldest night -3.5 °C at Eyre on 26 Aug
Coolest nights on average 5.2 °C at Collie East
Warmest nights on average 21.9 °C at Troughton Island
17.5 °C at Truscott (mainland)
Warmest night

24.1°C at Troughton Island on 19 Aug
23.3 °C at Argyle (mainland) on 9 Aug

Wettest overall 672.6 mm at Bickley
Wettest day 79 mm at Cape Leeuwin on 14 Aug
Highest wind gust 130 km/h at Cape Naturaliste on 28 Jun
130 km/h at Cape Leeuwin on 28 Jul

Record highest winter daily rainfall
Highest daily rainfall
in winter 2011 (mm)
Previous highest
for winter
Years of
record
Westbourne 69.8 on 22 Aug 68.8 on 15 Jun 1947 105
Arubiddy 32.4 on 8 Jun 31.2 on 20 Jul 1980 48
Frankland 64.0 on 22 Aug 58.2 on 15 Jun 1947 42
Glen Station 40.0 on 10 Jul 38.0 on 13 Jun 1989 30
Kybo 37.0 on 7 Jun 30.5 on 17 Jun 1986 30




Record highest winter temperature
Highest temperature
in winter 2011 (°C)
Previous highest
for winter
Years of
record
Average for
winter
Onslow 35.5 on 28 Aug 34.0 on 30 Aug 1988 52 25.6



Record lowest winter daily maximum temperature
Lowest daily maximum
temperature
in winter 2011 (°C)
Previous lowest
for winter
Years of
record
Average for
winter
Jurien Bay 13.0 on 10 Jul 13.2 on 8 Jun 1993 42 19.9



Record highest winter mean daily maximum temperature
Mean daily maximum
temperature
for winter 2011 (°C)
Previous highest
for winter
Years of
record
Average for
winter
Manjimup 16.3 16.2 in 2006 70 14.9
Bidyadanga 31.5 31.4 in 1996 50 30.1



Record highest winter daily minimum temperature
Highest daily minimum
temperature
in winter 2011 (°C)
Previous highest
for winter
Years of
record
Average for
winter
Ravensthorpe 18.4 on 22 Aug 17.0 on 7 Aug 2006 50 7.0
Emu Creek Station 21.9 on 14 Aug 21.3 on 6 Aug 1993 40 12.0



Record lowest winter temperature
Lowest temperature
in winter 2011 (°C)
Previous lowest
for winter
Years of
record
Average for
winter
Wyndham 8.3 on 14 Jun 8.6 on 29 Jun 2004 44 17.9
Telfer Aero 2.1 on 14 Jun 2.5 on 19 Jun 1976 38 11.7



Record highest winter mean daily minimum temperature
Mean daily minimum
temperature
for winter 2011 (°C)
Previous highest
for winter
Years of
record
Average for
winter
Balladonia 6.9 6.6 in 1991 86 5.3
Kalgoorlie-Boulder Airport 7.5 7.4 in 2007 69 5.6
Eucla 9.0 8.6 in 1996 64 7.6
Hyden 6.3 6.2 in 1991 38 5.0



Summary statistics for winter 2011
Maximum temperatures
for winter
(°C)
Minimum temperatures
for winter
(°C)
Rainfall
for winter
(millimetres)
Mean for
winter
2011
Diff
from
average
Highest for
winter
2011
Mean for
winter
2011
Diff
from
average
Lowest for
winter
2011
Total for
winter
2011
Average
for
winter
Rank of
winter
2011
Fraction of
winter
average
North Kimberley (district 01)
Doongan 28.8 -1.3 33.4 30 Aug 9.6 -2.1 2.4 15 Jun 0 7.5 v low 0%
Kalumburu 31.4 -0.9 36.4 29 Aug 12.1 -2.2 4.5 14 Jun 0.6 4.4 average 14%
Mount Elizabeth 28.1 -0.9 32.3 30 Aug 8.1 -0.9 0.6 15 Jun 0 18.3 lowest 0%
Troughton Island 27.9 -0.7 31.0 30 Aug 21.9 -0.8 18.9 13 Jun 0.8 11.5 average 7%
Truscott 30.2   35.7 30 Aug 17.5   11.3 15 Jun 0.2
Wyndham 30.7 -1.2 34.8 28 Aug 15.0 -2.9 8.3 14 Jun 0 7.2 lowest 0%
Wyndham Aero 31.4 -0.8 36.7 30 Aug 14.2 -1.6 6.9 15 Jun 0 7.2 v low 0%
East Kimberley (district 02)
Argyle Aerodrome 29.2 -1.1 33.9 29 Aug 14.8 -1.6 8.3 14 Jun 0 6.4 v low 0%
Halls Creek Airport 27.2 -0.9 32.8 16 Aug 12.4 -1.3 5.3 14 Jun 0.6 13.6 average 4%
Kununurra Aero 30.0 -1.1 34.7 29 Aug 13.2 -2.6 6.7 14 Jun 0 5.7 lowest 0%
Warmun 29.3 -1.1 34.1 16 Aug 12.2 -1.5 4.7 14 Jun 0 12.6 lowest 0%
West Kimberley (district 03)
Bidyadanga 31.5 +1.4 36.5 29 Aug 14.1 -0.6 5.2 13 Jun 2.2 30.6 low 7%
Broome Airport 30.1 +0.7 36.0 29 Aug 13.6 -1.0 5.9 15 Jun 0.6 26.8 v low 2%
Curtin Aero 31.5 -0.1 37.0 29 Aug 14.7 -1.3 8.9 3 Jun 0 19.1 v low 0%
Cygnet Bay 28.3 -0.6 33.1 28 Aug 14.0 -1.4 8.0 16 Jun 0 26.4 lowest 0%
Derby Aero 30.8 -0.4 35.9 29 Aug 13.8 -1.8 6.5 16 Jun 0 17.1 lowest 0%
Fitzroy Crossing Aero 30.8 -0.6 35.5 31 Aug 11.5 -1.4 4.7 13 Jun 0 17.7 v low 0%
West Roebuck 31.7 +0.5 36.6 30 Aug 12.7 -0.1 4.3 14 Jun 0 34.7 v low 0%
De Grey (district 04)
Bedout Island 25.6   30.0 29 Aug 19.7   16.0 12 Jul
Legendre Island 25.3   33.0 29 Aug 18.2   13.9 15 Jun
Marble Bar 28.7 +0.7 36.0 30 Aug 12.5 -0.3 6.0 16 Jun 9.8 35.5 average 28%
Pardoo Station 29.1 +0.4 34.5 29 Aug 13.3 -0.5 9.0 14 Jun 16.6 38.6 average 43%
Port Hedland Airport 28.6 +0.7 34.4 29 Aug 13.2 0.0 6.5 15 Jun 24.2 37.2 average 65%
Roebourne 28.8 +1.2 35.4 29 Aug 13.9 -0.6 8.6 15 Jun 23.9 47.7 average 50%
Roebourne Aero 28.5 -0.2 35.8 29 Aug 12.3 -0.6 6.1 15 Jun 16.8 35.3 average 48%
Fortescue (district 05)
Barrow Island Airport 24.5 +0.2 30.5 30 Aug 17.6 -0.4 14.7 7 Aug 95.6 43.7 high 219%
Learmonth Airport 25.9 +0.8 33.0 25 Aug 13.2 +1.0 7.3 22 Jun 53.4 77.0 average 69%
Mardie 28.4 0.0 35.2 28 Aug 12.9 +0.2 7.3 15 Jun 105.8 58.0 high 182%
Onslow 26.7 +1.1 35.5 28 Aug 15.7 +3.3 11.1 22 Jun 127.0 71.3 high 178%
Onslow Airport 26.8 +0.7 34.7 28 Aug 15.1 +1.6 10.6 17 Jun 137.2 75.2 high 182%
Wittenoom 26.2 +1.0 33.5 29 Aug 12.1 -0.4 5.8 15 Jun 21.1 51.0 average 41%
West Gascoyne (district 06)
Carnarvon Airport 23.8 +1.0 28.0 21 Aug 12.3 +0.7 6.5 5 Aug 143.6 111.8 high 128%
Denham 22.2 -0.1 27.0 27 Jun 14.7 +1.6 9.3 7 Jul 146.6 116.6 high 126%
Emu Creek Station 27.5 +1.3 34.6 29 Aug 13.1 +1.1 6.0 24 Jun 24.3 70.6 low 34%
Gascoyne Junction 24.8 +0.9 32.8 27 Aug 11.7 +1.8 6.2 13 Jun 66.8 72.1 average 93%
Murchison         8.5 +1.7 1.5 8 Jul 117.8 79.2 high 149%
Shark Bay Airport 23.1 -0.5 27.9 20 Aug 11.9 +0.9 7.3 7 Jul 139.6 89.9 v high 155%
East Gascoyne (district 07)
Paraburdoo Aero 26.5 +0.8 34.1 29 Aug 11.3 +0.8 5.9 3 Jul 33.4 49.0 average 68%
Murchison (district 07A)
Meekatharra Airport 21.3 +1.3 30.2 29 Aug 9.3 +1.1 2.7 3 Jul 71.4 64.0 high 112%
Mount Magnet Aero 19.8 0.0 29.1 21 Aug 9.0 +1.4 1.7 6 Jul 148.8 70.6 high 211%
North Coast (district 08)
Dalwallinu 17.6 -0.2 25.0 21 Aug 7.5 +1.3 2.3 5 Aug 163.4 117.9 high 139%
Dalwallinu Comparison 18.1 +0.3 25.9 21 Aug         177.6 169.4 average 105%
Geraldton Airport Comparison 20.3 +0.1 25.3 27 Jun 10.1 +0.4 3.0 26 Aug        
Kalbarri 22.9 +0.6 28.3 27 Jun 11.3 +1.2 3.8 5 Aug 186.5 203.0 average 92%
Morawa Airport 19.3 -0.2 27.2 21 Aug 7.7 +1.2 1.3 6 Jul 171.8 116.3 high 148%
Mullewa 20.3 +0.7 28.3 21 Aug 8.9 +1.4 3.4 7 Jul 173.8 167.6 average 104%
North Island 21.8 +0.3 26.0 1 Jun 15.9 +0.1 10.2 12 Aug 282.6 175.7 v high 161%
Wongan Hills 18.3 +0.6 26.2 21 Aug 7.9 +0.9 2.5 4 Jul 198.9 192.9 average 103%
Central Coast (district 09)
Badgingarra Research Stn 18.0 -0.2 23.7 21 Aug 8.6 +1.1 3.6 6 Jul 289.6 297.4 average 97%
Bickley 16.1 +0.5 23.2 21 Aug 8.4 +0.9 3.0 5 Aug 672.6 596.4 high 113%
Champion Lakes 18.5   25.3 21 Aug 10.5   3.8 4 Jul 357.2
Garden Island HSF 18.5   24.1 21 Aug 12.2   7.4 4 Jul 374.0 330.1 high 113%
Gingin Aero 19.0 +0.1 26.1 21 Aug 8.2 +1.7 0.0 4 Jul 402.8 355.5 high 113%
Gooseberry Hill 17.5 +0.4 24.6 21 Aug 10.1 +0.5 5.1 7 Jul
Gosnells City 19.8 +0.7 27.5 21 Aug         441.7 461.9 average 96%
Jandakot Aero 19.3 +0.9 26.2 21 Aug 8.3 +1.3 -0.4 4 Jul 520.4 465.6 average 112%
Jurien Bay 20.7 +0.8 24.4 27 Jun        
Lancelin 20.4 +0.9 25.7 27 Jun 10.2 0.0 4.5 5 Jul 310.0 339.6 average 91%
Pearce RAAF 18.9 +0.6 25.6 21 Aug 9.4 +0.7 0.7 4 Jul 291.6 375.7 low 78%
Perth Airport 19.4 +1.0 27.0 21 Aug 9.1 +0.8 0.2 4 Jul 436.4 438.9 average 99%
Perth Metro 19.3 +0.5 26.3 21 Aug 9.2 +1.2 1.3 4 Jul 447.6 479.0 average 93%
Rottnest Island 18.3 +0.3 22.5 21 Aug 13.2 +0.6 9.2 3 Jul 359.2 392.1 average 92%
Swanbourne 19.4 +0.7 24.5 21 Aug 10.8 +0.8 4.7 4 Jul 444.6 394.3 high 113%
South Coast (district 09A)
Albany 17.7 +1.5 26.5 21 Aug 8.9 +0.4 1.8 18 Jul 419.5 403.5 average 104%
Albany Airport 17.0 +0.8 25.7 21 Aug 8.2 +0.5 0.4 18 Jul 362.6 333.7 high 109%
Bridgetown 16.6 +0.4 22.9 21 Aug 5.8 +1.1 -2.0 18 Jul
Bridgetown Comparison 17.6 +1.3 24.5 21 Aug 5.6 +0.9 -1.2 18 Jul 364.1 412.5 average 88%
Bunbury 18.1 +0.4 22.1 29 Aug 8.4 +0.9 1.1 5 Jun 384.0 413.5 average 93%
Busselton 18.0 +0.5 22.2 29 Aug 9.2 +0.9 2.1 5 Aug 376.8 389.1 average 97%
Busselton Aero 17.9 +0.7 21.7 29 Aug 7.8 +0.7 1.5 5 Aug 260.0 375.5 v low 69%
Cape Leeuwin 17.8 +1.1 22.5 21 Aug 12.4 +0.9 6.7 6 Aug 429.0 495.5 low 87%
Cape Naturaliste 17.8 +1.1 21.7 23 Jun 11.7 +1.1 6.4 9 Jul 287.8 439.7 v low 65%
Collie East 17.0   24.2 21 Aug 5.2   -1.9 18 Jul 464.4
Donnybrook 18.2 +1.2 24.8 21 Aug 7.2 +1.1 0.6 5 Jul 515.4 527.0 average 98%
Dwellingup 16.7 +1.2 24.1 21 Aug 6.6 +0.8 -0.6 4 Jul        
Esperance 19.0 +1.4 31.1 21 Aug 9.4 +0.8 5.1 10 Jul 233.2 259.6 average 90%
Esperance Aero 17.9 +1.0 29.5 21 Aug 8.5 +0.6 4.2 17 Jul 144.2 214.7 low 67%
Harvey 18.1 +0.4 24.5 21 Aug 7.3 -0.5 2.0 5 Jun 519.5 441.1 high 118%
Hopetoun North 19.0 +0.3 31.3 21 Aug 9.1 +1.1 3.7 13 Jun 164.4 168.9 average 97%
Jarrahwood 17.6 +0.9 22.0 21 Aug 5.7 +0.5 -2.6 18 Jul 415.8 484.3 average 86%
Mandurah 18.4   23.6 29 Aug 11.8   6.3 4 Jul 372.8 343.3 average 109%
Manjimup 16.3 +1.4 23.2 21 Aug 7.4 +0.7 1.7 5 Aug 440.2 487.1 average 90%
Pemberton 16.9 +1.5 23.5 21 Aug 9.0 +1.6 2.4 18 Jul
Rocky Gully 15.7 +0.6 22.8 21 Aug 7.3 +0.4 1.3 5 Aug 360.2 275.4 high 131%
Shannon 15.8 +0.5 23.0 21 Aug 7.5 +0.6 0.6 18 Jul 460.2 472.4 low 97%
Windy Harbour 17.7 +0.6 22.6 20 Aug 9.0 0.0 1.5 6 Aug 580.0 530.8 average 109%
Witchcliffe 17.2 +0.4 20.9 21 Aug 8.7 +0.5 1.1 6 Aug 561.8 499.1 high 113%
North Central (district 10)
Cunderdin Airfield 18.0 +0.3 25.5 21 Aug 6.6 +1.8 -0.3 5 Aug
Kellerberrin 18.0 +0.9 25.8 21 Aug     -1.5 26 Aug 106.4 147.5 low 72%
Merredin                 118.4 139.7 average 85%
Northam         6.6 +0.8 0.3 4 Jul 224.5 224.4 average 100%
York 18.0 +0.3 25.4 21 Aug 5.6 +1.6 -1.5 5 Aug 210.5 193.3 average 109%
South Central (district 10A)
Beverley 18.1 +0.7 25.4 21 Aug 6.8 +1.5 0.2 4 Jul 202.7 215.9 average 94%
Brookton 17.1 +0.5 24.5 21 Aug 5.9 +1.0 -0.9 5 Aug 190.6 235.3 low 81%
Corrigin 16.8 +0.8 25.7 21 Aug 6.5 +1.3 -1.1 5 Aug 158.4 168.4 average 94%
Hyden 18.3 +1.3 28.6 21 Aug 6.3 +1.3 -2.0 26 Aug 126.3 138.5 average 91%
Katanning 15.6 +0.3 23.5 21 Aug 7.0 +0.9 1.8 25 Aug 192.0 193.1 average 99%
Katanning Comparison 16.2 +1.0 25.0 21 Aug 6.2 +0.4 -1.5 18 Jul 202.0 215.0 average 94%
Lake Grace 16.7 +0.3 26.9 21 Aug 6.9 +1.3 0.4 5 Aug 129.2 106.3 high 122%
Lake Grace Comparison 16.8 +0.7 26.6 21 Aug 7.0 +1.0 1.0 5 Aug 126.4 138.9 average 91%
Narembeen 17.9 +0.7 27.3 21 Aug         151.5 144.1 average 105%
Narrogin 15.9 +0.8 24.0 21 Aug 6.4 +0.8 -0.6 5 Aug 223.4 242.7 average 92%
Newdegate Research Station 16.5 +0.6 26.1 21 Aug 5.4 +1.0 -1.2 26 Aug 135.4 144.1 average 94%
Ongerup 16.3 +0.8 26.1 21 Aug 6.6 +0.5 1.4 5 Jun 128.4 141.9 average 90%
Pingelly 16.6 +0.7 24.5 21 Aug 6.8 +0.9 0.8 4 Jul 235.8 226.8 average 104%
Ravensthorpe 18.0 +1.1 29.2 21 Aug     2.0 17 Jul 90.9 134.4 low 68%
Wagin 16.4 +0.5 24.6 21 Aug 6.6 +0.8 0.0 5 Aug 183.3 201.5 average 91%
Wandering 16.6 +0.3 25.0 21 Aug 5.8 +1.9 -1.0 4 Jul 327.8 266.5 high 123%
Eucla (district 11)
Balladonia 19.2 +1.0 31.1 22 Aug 6.9 +1.6 1.0 17 Jul 70.6 67.8 average 104%
Eucla 19.8 +1.2 30.7 24 Aug 9.0 +1.4 3.0 8 Aug 89.8 81.7 average 110%
Eyre 19.9 +1.1 32.0 22 Aug 7.2 +1.0 -3.5 26 Aug 137.1 104.6 high 131%
Forrest 19.6 +0.2 30.0 24 Aug 7.0 +1.4 1.2 15 Jun 95.0 53.3 high 178%
Red Rocks Point 19.1   30.8 22 Aug 9.4   3.4 2 Jul 130.4
South East (district 12)
Bulga Downs 20.6   31.2 21 Aug 7.1   -0.1 6 Aug 132.3 67.1 v high 197%
Kalgoorlie-Boulder Airport 18.1 +0.5 29.4 21 Aug 7.5 +1.9 0.4 6 Jul 83.2 74.7 average 111%
Laverton Aero 19.5 +0.5 29.5 30 Aug 8.3 +1.7 0.0 4 Jul 98.8 43.8 high 226%
Leinster Aero 20.3 +0.6 29.4 28 Aug 8.7 +1.8 -0.3 6 Jul 75.4 46.6 high 162%
Leonora 19.6 +0.2 29.3 21 Aug 8.4 +1.6 2.2 9 Jul 106.9 60.2 v high 178%
Leonora Aero 19.6   29.3 21 Aug 8.4   1.7 4 Jul 95.2
Munglinup West 18.2   30.7 21 Aug 7.6   2.8 17 Aug 88.4 110.7 low 80%
Norseman Aero 18.8 +0.6 30.8 21 Aug 5.8 +1.6 -1.1 25 Aug 40.0 56.6 low 71%
Salmon Gums Res.Stn. 18.4 +1.7 30.8 21 Aug 5.8 +0.9 -2.8 26 Aug 78.6 108.9 low 72%
Southern Cross Airfield 18.2 +0.6 28.9 21 Aug 6.2 +2.6 -1.2 5 Aug 95.6 91.9 average 104%
Yeelirrie 21.3 +1.2 29.9 28 Aug 5.9 +1.6 -3.0 6 Jul 66.5 53.6 high 124%
North East (district 13)
Carnegie 23.3 +1.3 33.0 30 Aug 7.1 +0.5 -0.2 15 Jun 11.0 34.2 average 32%
Giles Meteorological Office 21.8 +0.8 30.4 31 Aug 8.3 +0.4 0.9 13 Jun 44.0 40.0 average 110%
Telfer Aero 26.7 +0.4 34.0 31 Aug 11.5 -0.2 2.1 14 Jun 19.6 31.3 average 63%
Warburton Airfield 22.6 +1.1 32.6 31 Aug 7.0 +0.6 -0.3 15 Jun 30.6 41.7 average 73%
Wiluna 22.1 +1.8 31.0 29 Aug 7.9 +1.6 1.1 15 Jun 51.8 49.4 average 105%

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 12 pm on Thursday 1 September 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.
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
(03) 9669 4057
Enquiries