Western Australia in winter 2013: dry and warm winter in the southwest

  • Rainfall: near average for WA, 10th driest winter for southwest WA
  • Maximum temperature: 10th warmest winter for WA, 6th warmest winter for southwest WA
  • Minimum temperature: above average

Rainfall

Rainfall during winter 2013 was below to very much below average across the western and southern Gascoyne, the Southwest Land Division (SWLD), southern Goldfields, and parts of the Eucla, and Wandana in the Central West recorded its driest winter in 53 years of recording. Above to very much above average winter rainfall was reported in much of the Pilbara, the northeast Gascoyne, large parts of the Kimberley, and most of the Northern and Southern Interior, with Port Hedland and Karratha both recording their wettest winter on record. The wet winter in northern parts of WA was mainly the result of a very wet June.

Averaged across WA as a whole, winter 2013 rainfall was near average for the State, as a result of an above average June, a near average rainfall in July, and below average rainfall in August. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) recorded its tenth driest winter on record, with a near record dry June followed by below average rainfall in July, and a near average August. For the SWLD as a whole, winter rainfall was eighth driest, the result of a record dry June, a below average July, and a near average August. The SWLD's driest winter, from comparable records extending back to 1900, occurred in 2006, and its second driest winter occurred in 2010.

A weak tropical low drifting close to the west Kimberley coast on 5 and 6 June brought thunderstorms and the re-intensification of a cloudband over northern WA with extremely heavy falls reported in the west Kimberley as a result, and a number of sites registered their highest daily rainfall on record for winter in the 24 hours to 9am on 6 or 7 June. West Roebuck, near Broome, recorded 202.0 mm in the 24 hours to 9am on 6 June, which was the highest daily total recorded during the event. Broome Airport recorded 146.4 mm on 6 June exceeding the previous winter daily record at the airport of 127.0 mm on 24 June 1968, and also exceeding the highest winter daily rainfall at the Broome Post Office of 143.0 mm on 15 June 1901, thus becoming the wettest winter day in the town since recording began in 1889.

A number of sites in the Pilbara saw exceptionally heavy rainfall from late on 23 June to the morning of 25 June as a cloudband developed over the northwest. Roebourne recorded 223.6 mm, the highest winter daily fall at the site since records commenced in 1887, and the second highest daily fall at the site for any month, only behind 233.7 mm on 7 March 1945. It was also the highest daily fall in winter 2013 in WA. A number of other sites in the Pilbara also reported their highest winter daily fall as result of this event.

A complex low pressure system moved across the southern half of WA between 11 and 13 July bringing widespread significant rainfall to the SWLD and adjacent Gascoyne and Goldfields. Several sites in the northern Great Southern and southern Central Wheat Belt recorded their wettest winter day on record on the 12th, including Kondinin in the Great Southern, which recorded 71.0 mm, its wettest winter day in 97 years of record.

Maximum temperature

Mean daily maximum temperatures during winter 2013 were above to very much above average over much of the State with near average daytime maxima confined to most of the Pilbara, and parts of the east Gascoyne, northern Goldfields, and western Northern and Southern Interior. Maximum temperatures were up to 3 °C above average in the eastern Eucla, and the Eucla observation site registered its warmest winter in 68 years of recording as a result. Pearce RAAF in the Lower West recorded its equal warmest winter daytime temperature in 52 years of record, equal with 19.7 °C in winter 2005.

When averaged across the State, the mean maximum temperature for winter 2013 was the tenth warmest on record, the result of a near average June, an above average July, and the second warmest August on record. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) recorded its sixth warmest winter on record, with an above average June and July, and the fourth warmest August on record.

Unusually hot days for August were reported in parts of the Kimberley and Northern Interior from 12 to 21 August with daily maxima in the mid-to-high thirties at times. Warmun in the east Kimberley recorded a daily maximum of 39.5 °C on the 20th, which was the highest temperature in August 2013 in WA, and the highest winter temperature at Warmun in 52 years of record, exceeding the previous record of 39.0 ºC on 31 August 2009.

Minimum temperature

Mean daily minimum temperatures during winter 2013 were above to very much above average over much of WA, and up to 2 °C warmer than normal in parts of northern and eastern WA. The only areas of WA to experience below average overnight minima were the southwest Gascoyne and northwest Central West, whilst near average mean minima were observed in western parts of WA, large parts of the Kimberley and a small area in the eastern Southern Interior. A few sites on the south coast of WA observed their mildest winter nights on record in 2013 largely a result of relatively high sea surface temperatures in the region.

When averaged across the State, the mean minimum temperature for winter 2013 was above average, with an above average June followed by a near average July, and an above average August. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) also recorded an above average winter, with a near average June and July, and the third warmest August on record.

Troughton Island recorded a daily minimum temperature of 27.1 °C on both 1 and 6 June, which equalled the warmest winter night on record at the site, also recorded on 2 June 2007, and became the equal second highest winter minimum on record in WA, the highest being 27.2 ºC at Cockatoo Island on 1 June 1971. Onslow Airport also endured a record warm night in winter as cloud moved over the area with a daily minimum temperature of 23.3 °C on 11 June.

Cold nights were reported across southern WA from 5 to 9 July as a result of generally clear skies and light winds. Many sub-zero temperatures were reported, aided by particularly dry soils following an extremely dry June, and a number of sites in the SWLD experienced their coldest or equal coldest night in winter on record on the 8th. Corrigin (Central Wheat Belt) registered its lowest winter temperature in in 66 years of record with -4.2 °C, overtaking its previous record of -4.0 °C on 26 June 2010, whilst Narrogin equalled its 98 year winter record low temperature of -2.7 ºC.

 

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Extremes in winter 2013
Hottest day 39.5 °C at Warmun on 20 Aug
Warmest days on average 33.9 °C at Wyndham Aero
Coolest days on average 15.7 °C at Rocky Gully
Coldest day 9.3 °C at Yeelirrie on 7 Jul
Coldest night -4.8 °C at Wandering on 8 Jul
Coolest nights on average 3.8 °C at York
Warmest nights on average 24.1 °C at Troughton Island
19.8 °C at Truscott
Warmest night 27.1 °C at Troughton Island on 1 & 6 Jun
25.4 °C at Cygnet Bay on 5th & 26th Jun
Wettest overall 667.8 mm at Margaret River
Wettest day 223.6 mm at Roebourne on 25 Jun
Highest wind gust 115 km/h at Cape Naturaliste on 16 Jul

Maps

Maps
Observed Anomaly Decile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Record highest winter daily rainfall
Highest daily rainfall
in winter 2013 (mm)
Previous wettest
for winter
Years of
record
Roebourne 223.6 on 25 Jun 133.9 on 10 Jun 1968 122
Karratha Station 180.0 on 25 Jun 97.2 on 13 Jun 1989 113
Koorikin 59.4 on 12 Jul 58.4 on 8 Jun 1918 102
Colorado 61.0 on 12 Jul 54.9 on 18 Jun 1945 101
Ardath 57.0 on 12 Jul 51.6 on 13 Jun 1968 98
Kondinin 71.0 on 12 Jul 53.8 on 8 Jun 1918 97
Cape Leveque 137.9 on 7 Jun 136.7 on 14 Jul 1956 87
Bendering 59.0 on 12 Jul 49.2 on 30 Jul 2001 85
Warambie 173.4 on 25 Jun 110.2 on 13 Jun 1989 77
Broome Airport 139.0 on 6 Jun 127.0 on 24 Jun 1968 75
Port Hedland Airport 140.0 on 25 Jun 127.6 on 5 Jun 2002 72
Pyramid Station 141.2 on 25 Jun 113.0 on 13 Jun 1989 59
Cygnet Bay 173.0 on 7 Jun 96.5 on 20 Jun 1968 50
Country Downs 134.0 on 6 Jun 74.4 on 6 Jul 2010 43
Karratha Aero 209.4 on 25 Jun 66.6 on 11 Jul 2005 41



Record highest total winter rainfall
Total rainfall
for winter 2013 (mm)
Previous wettest
for winter
Years of
record
Average for
winter
Port Hedland Airport 262.2 143.0 in 1993 71 40.0
Karratha Aero 272.2 230.6 in 1998 40 53.3



Record lowest total winter rainfall
Total rainfall
for winter 2013 (mm)
Previous driest
for winter
Years of
record
Average for
winter
Wandana 37.8 49.4 in 2006 53 141.3

 



Record highest winter temperature
Highest temperature
in winter 2013 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Warmun 39.5 on 20 Aug 39.0 on 31 Aug 2009 52 30.4



Record highest winter mean daily maximum temperature
Mean daily maximum
temperature
for winter 2013 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Eucla 20.6 20.5 in 1994 68 18.6
Pearce RAAF 19.7 = 19.7 in 2006 52 18.3



Record highest winter daily minimum temperature
Highest daily minimum
temperature
in winter 2013 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Onslow Airport 23.3 on 11 Jun 23.2 on 16 Aug 1960 48 13.5
Troughton Island 27.1 on 6 Jun = 27.1 on 2 Jun 2007 34 22.6



Record lowest winter temperature
Lowest temperature
in winter 2013 (°C)
Previous coolest
for winter
Years of
record
Average for
winter
Narrogin -2.7 on 8 Jul = -2.7 on 18 Jun 1966 98 5.6
Corrigin -4.2 on 8 Jul -4.0 on 26 Jun 2010 66 5.2
Beverley -3.8 on 8 Jul -3.6 on 16 Jun 2006 44 5.4



Record highest winter mean daily minimum temperature
Mean daily minimum
temperature
for winter 2013 (°C)
Previous warmest
for winter
Years of
record
Average for
winter
Cape Leeuwin 12.8 12.7 in 1959 116 11.6
Albany 10.2 10.1 in 2007 95 8.5
Esperance 9.7 9.5 in 1983 44 8.7



Summary statistics for winter 2013
Maximum temperatures
for winter
(°C)
Minimum temperatures
for winter
(°C)
Rainfall
for winter
(millimetres)
Mean for
winter
2013
Diff
from
average
Highest for
winter
2013
Mean for
winter
2013
Diff
from
average
Lowest for
winter
2013
Total for
winter
2013
Average
for
winter
Rank of
winter
2013
Fraction of
winter
average
North Kimberley (district 01)
Doongan 31.0 +1.0 36.1 20 Aug 12.4 +1.0 3.1 26 Jul 0.5 6.9 average 7%
Kalumburu 33.2 +1.0 37.1 14 Aug 15.3 +1.3 7.9 27 Jul        
Mount Elizabeth 30.3 +1.3 36.0 21 Aug 9.6 +0.8 -0.2 26 Jul 4.6 17.5 average 26%
Troughton Island 29.7 +1.1 31.3 9 Jul 24.1 +1.5 19.6 27 Jul 0.8 10.9 average 7%
Truscott 31.5   33.6 21 Aug 19.8   14.3 27 Jul 5.0 5.1 high 98%
Wyndham 33.1 +1.2 37.1 14 Aug 18.2 +0.5 10.7 27 Jul 6.4 7.0 high 91%
Wyndham Aero 33.9 +1.8 38.0 21 Aug 17.3 +1.8 8.5 26 Jul 4.0 6.9 high 58%
East Kimberley (district 02)
Argyle Aerodrome 32.2 +2.0 39.2 20 Aug 17.8 +1.6 10.0 25 Jul 3.2 6.1 high 52%
Halls Creek Airport 29.9 +1.8 36.6 20 Aug 15.2 +1.5 6.8 27 Jul 2.0 13.2 average 15%
Kununurra Aero 33.1 +2.0 37.9 31 Aug 15.1 -0.5 6.4 27 Jul 3.4 5.4 high 63%
Warmun 32.0 +1.6 39.5 20 Aug 15.2 +1.5 5.5 27 Jul 2.5 12.4 average 20%
West Kimberley (district 03)
Bidyadanga 30.3 +0.2 35.0 19 Aug 15.5 +0.8 7.2 25 Jul 98.7 30.9 v high 319%
Broome Airport 29.4 0.0 35.3 19 Aug 15.8 +1.2 8.8 26 Jul 178.4 28.5 v high 626%
Curtin Aero 32.4 +0.8 37.3 20 Aug 16.5 +0.6 8.2 8 Aug 30.2 18.7 high 161%
Derby Aero 31.6 +0.4 38.1 20 Aug 15.6 +0.2 6.7 26 Jul 55.6 17.5 high 318%
Fitzroy Crossing Aero 32.5 +1.1 38.5 18 Aug 14.0 +1.3 4.8 25 Jul 35.2 17.7 high 199%
De Grey (district 04)
Karratha Aero 26.7 -0.3 31.3 11 Jun 14.7 +0.4 9.9 18 Jul 272.2 53.3 highest 511%
Legendre Island 25.1   29.1 8 Aug 18.4   14.9 21 Jul
Mandora 29.4 -0.1 34.8 20 Aug 14.4 +1.1 6.7 6 Aug 135.8 29.2 v high 465%
Marble Bar         13.1 +0.4 7.4 26 Jul        
Port Hedland Airport 27.8 -0.2 33.7 20 Aug 14.2 +1.0 8.4 21 Jul 262.2 40.0 highest 656%
Roebourne 28.2 +0.6 33.2 16 Jul 15.0 +0.5 10.3 26 Jul 275.8 49.6 v high 556%
Fortescue (district 05)
Barrow Island Airport 24.1 -0.2 29.7 14 Aug 18.1 +0.1 13.3 21 Jul 215.6 55.4 v high 389%
Learmonth Airport 25.0 -0.1 32.4 20 Aug 12.2 -0.1 5.0 22 Jul 114.4 76.7 high 149%
Mardie 28.0 -0.5 33.8 10 Jun 13.8 +1.1 8.0 19 Jul        
Onslow Airport 27.0 +0.9 33.5 10 Jun 14.7 +1.2 9.3 22 Jul 118.8 75.5 high 157%
Wittenoom 25.6 +0.4 31.7 15 Aug 13.1 +0.6 6.5 21 Jun 87.2 51.0 high 171%
West Gascoyne (district 06)
Carnarvon Airport 24.2 +1.3 31.6 3 Aug 11.1 -0.5 4.0 22 Jul 29.8 109.7 v low 27%
Denham 22.6 +0.3 30.2 23 Aug         79.8 116.3 low 69%
Emu Creek Station 26.6 +0.3 33.1 20 Aug 12.6 +0.6 7.5 21 Jul 58.6 69.9 average 84%
Murchison 22.2 +0.4 29.0 7 Aug         60.4 78.1 average 77%
Shark Bay Airport 23.7 +0.1 30.6 24 Aug 11.0 -0.1 4.3 22 Jul 80.8 92.0 average 88%
East Gascoyne (district 07)
Newman Aero 23.9 -0.1 31.3 15 Aug 9.2 +2.3 2.3 22 Jun 78.6 36.2 high 217%
Paraburdoo Aero 25.6 -0.2 31.8 20 Aug 11.7 +1.2 6.6 22 Jun 78.6 48.8 high 161%
Murchison (district 07A)
Meekatharra Airport 20.4 +0.3 27.8 7 Aug 8.2 0.0 2.1 18 Jul 71.6 63.5 high 113%
Mount Magnet Aero 20.5 +0.6 28.7 7 Aug 7.8 +0.1 0.3 18 Jul 31.6 68.2 v low 46%
North Coast (district 08)
Carnamah 19.7 +1.0 28.2 24 Aug         109.0 194.2 v low 56%
Dalwallinu 18.4 +0.6 26.2 24 Aug 6.1 -0.2 0.6 21 Jul 104.2 114.7 average 91%
Geraldton Airport 21.5   30.1 24 Aug 8.6   2.3 19 Jul 140.4
Kalbarri 23.6 +1.3 29.4 23 Aug 9.6 -0.6 1.2 19 Jul 83.1 198.9 v low 42%
Morawa Airport 20.1 +0.5 28.1 24 Aug 5.9 -0.7 0.4 19 Jul 88.6 116.7 low 76%
Mullewa 21.1 +1.5 29.0 24 Aug 8.0 +0.5 3.4 19 Jul 69.4 166.3 v low 42%
North Island 22.1 +0.5 26.4 23 Aug 15.5 -0.3 8.8 15 Jul 113.6 173.9 v low 65%
Wongan Hills 18.7 +1.0 26.5 24 Aug 6.6 -0.4 1.1 5 Jul 99.0 191.6 v low 52%
Central Coast (district 09)
Badgingarra Research Stn 18.3 +0.1 25.2 24 Aug 7.4 -0.2 3.2 12 Jul 215.2 294.6 low 73%
Bickley 16.3 +0.6 23.1 24 Aug 8.2 +0.6 1.7 8 Jul 527.8 591.3 average 89%
Champion Lakes 18.7   24.4 24 Aug 9.6   3.7 18 Jul 354.4
Garden Island HSF 18.7 +0.4 21.9 23 Aug 12.0 +0.6 6.5 8 Jul 293.8 321.8 low 91%
Gingin Aero 19.3 +0.4 26.7 24 Aug 6.5 -0.1 -1.4 8 Jul 333.2 349.7 average 95%
Jandakot Aero 19.2 +0.7 25.0 24 Aug 7.4 +0.4 -1.2 8 Jul 411.0 459.9 average 89%
Karnet 16.6 +0.7 22.4 24 Aug 7.0 +0.4 0.3 8 Jul 517.7 619.0 low 84%
Lancelin 20.6 +1.1 25.0 23 Aug         222.4 334.2 v low 67%
Medina Research Centre         8.4 -0.1 0.8 18 Jul        
Pearce RAAF 19.7 +1.4 26.2 24 Aug 7.6 -1.1 -0.9 18 Jul 264.7 372.7 low 71%
Perth Airport 19.6 +1.2 26.1 24 Aug 8.1 -0.2 -0.3 18 Jul 293.2 434.6 v low 67%
Perth Metro 19.7 +0.8 26.4 24 Aug 8.5 +0.4 1.4 18 Jul 351.4 477.2 low 74%
Rottnest Island 18.9 +0.8 22.9 23 Aug 13.4 +0.8 9.2 17 Jul 229.2 391.1 low 57%
Swanbourne 19.7 +0.9 23.7 24 Aug 10.3 +0.3 4.4 8 Jul 368.4 388.8 average 95%
South Coast (district 09A)
Albany 17.5 +1.3 22.6 31 Aug 10.2 +1.7 5.2 16 Jun 362.8 403.2 average 90%
Albany Airport 17.3   22.9 24 Aug 8.3   1.8 16 Jun 320.6
Bridgetown 16.5 +0.2 21.6 24 Aug 5.6 +0.8 -2.6 8 Jul 339.6 345.7 average 98%
Bunbury 18.3 +0.6 21.8 4 Aug 8.0 +0.5 -1.1 8 Jul 346.0 404.6 low 86%
Busselton Aero 17.8 +0.5 21.3 14 Jul 7.5 +0.4 0.6 7 Jul        
Cape Leeuwin 17.7 +1.0 20.6 23 Aug 12.8 +1.2 7.5 21 Jul 462.8 494.0 average 94%
Cape Naturaliste 17.8 +1.1 21.7 1 Jul 11.5 +0.8 6.2 7 Jul 397.0 438.1 average 91%
Collie East 17.1 +0.3 23.0 24 Aug 5.0 +0.9 -3.7 8 Jul 346.2 362.5 average 96%
Donnybrook 18.1 +1.0 22.7 24 Aug 7.0 +0.9 -0.6 8 Jul 475.5 525.2 average 91%
Dwellingup 16.7 +1.2 22.4 24 Aug 6.2 +0.4 -1.7 8 Jul 546.6 672.4 low 81%
Esperance 18.0 +0.3 26.2 24 Aug 9.7 +1.0 3.6 8 Jul 278.6 260.0 average 107%
Esperance Aero 17.7 +0.8 25.1 24 Aug 8.4 +0.5 3.0 8 Jul 197.4 214.5 average 92%
Harvey 18.2 +0.5 23.0 24 Aug         487.2 438.6 average 111%
Hopetoun North 18.7 0.0 26.9 24 Aug 9.4 +1.3 3.3 14 Jun 157.8 171.2 average 92%
Jarrahwood 17.5 +0.7 22.2 24 Aug 5.4 +0.2 -3.0 7 Jul 510.2 481.3 average 106%
Mandurah 18.4 +0.4 21.1 23 Aug 11.4 +0.4 6.0 21 Jul 266.8 337.4 v low 79%
Manjimup 15.9 +1.0 21.7 24 Aug 7.5 +0.7 1.1 7 Jul 334.4 483.5 low 69%
North Walpole 16.7   20.7 24 Aug 9.8   4.9 11 Jun  
Pemberton 16.4 +0.9 21.2 1 Jul 8.6 +1.1 1.6 8 Jul 483.3 567.9 low 85%
Rocky Gully 15.7 +0.5 21.8 24 Aug 7.4 +0.5 -0.3 7 Jul
Windy Harbour 17.4 +0.3 20.5 24 Aug 9.7 +0.7 2.2 17 Jul        
Witchcliffe 17.3 +0.5 20.6 24 Aug 8.6 +0.3 0.9 21 Jul 658.0 511.8 high 129%
North Central (district 10)
Bencubbin 18.1 +1.0 25.6 24 Aug 6.5 +0.1 0.0 8 Jul 98.9 131.8 low 75%
Cunderdin Airfield 18.3 +0.6 26.2 24 Aug 4.8 -0.1 -3.7 8 Jul 85.4 125.5 v low 68%
Kellerberrin 18.5 +1.3 26.0 24 Aug 4.6 -1.3 -4.5 8 Jul 101.2 146.7 low 69%
Merredin 18.3 +1.3 26.1 24 Aug 5.5 -0.4 0.0 18 Jun 83.0 138.8 v low 60%
Northam 18.8 +1.2 25.9 24 Aug 5.2 -0.6 -3.2 8 Jul 150.8 223.2 low 68%
York 18.4 +0.7 24.8 24 Aug 3.8 -0.2 -4.5 5 Jul 157.8 189.1 low 83%
South Central (district 10A)
Beverley 18.6 +1.1 25.0 24 Aug 5.0 -0.4 -3.8 8 Jul 140.6 214.6 v low 66%
Brookton 17.6 +0.9 23.6 24 Aug 4.7 -0.2 -2.6 8 Jul 186.1 234.8 low 79%
Corrigin 17.4 +1.4 25.0 24 Aug 5.2 0.0 -4.2 8 Jul 168.9 167.8 average 101%
Hyden 17.9 +0.8 25.5 24 Aug 5.0 0.0 -4.0 6 Jul 134.7 137.8 average 98%
Jacup 17.0 +0.6 24.7 24 Aug 6.7 +0.8 0.7 7 Jul
Katanning 15.8 +0.4 22.3 24 Aug 6.8 +0.6 -2.0 8 Jul
Lake Grace 16.7 +0.3 24.5 24 Aug 6.4 +0.7 -2.5 8 Jul 68.0 102.5 low 66%
Narembeen 17.8 +0.5 25.6 24 Aug 6.0 +0.3 -2.0 6 Jul 146.8 143.5 average 102%
Narrogin 16.5 +1.4 22.8 24 Aug 5.7 +0.1 -2.7 8 Jul 148.6 240.9 v low 62%
Newdegate Research Station 16.4 +0.4 23.0 24 Aug 4.9 +0.5 -3.8 8 Jul 92.8 143.2 v low 65%
Ongerup 16.4 +0.8 23.5 24 Aug 6.9 +0.8 -0.5 7 Jul 134.0 141.7 average 95%
Pingelly 17.1 +1.2 23.0 24 Aug 6.0 +0.1 -1.1 8 Jul 183.2 225.6 low 81%
Ravensthorpe 17.6 +0.7 26.0 24 Aug 7.8 +0.7 1.7 8 Jul 161.1 134.7 high 120%
Wagin 16.5 +0.6 23.4 24 Aug 6.5 +0.7 -2.2 8 Jul 116.4 200.0 v low 58%
Wandering 16.8 +0.4 23.8 24 Aug 4.7 +0.6 -4.8 8 Jul 204.0 258.0 low 79%
Eucla (district 11)
Balladonia 19.0 +0.8 26.7 7 Aug 6.0 +0.7 -2.5 8 Jul 60.9 67.6 average 90%
Eucla 20.6 +2.0 31.5 8 Aug 8.4 +0.8 2.1 8 Jul 46.8 81.3 low 57%
Eyre 20.3 +1.5 29.6 25 Aug 5.9 -0.3 -4.1 8 Jul 111.1 104.3 average 107%
Forrest 20.8 +1.3 31.8 8 Aug 6.5 +0.9 0.2 5 Jul 12.4 46.8 v low 26%
Red Rocks Point 20.0   29.7 8 Aug 8.8   4.1 8 Jul 94.0 117.1 average 80%
South East (district 12)
Bulga Downs 20.7 +0.3 28.5 8 Aug 5.8 0.0 -1.3 18 Jul 32.2 66.6 low 48%
Kalgoorlie-Boulder Airport 18.6 +1.0 26.5 8 Aug 6.2 +0.6 -2.3 6 Jul 52.4 74.1 average 71%
Laverton Aero 20.0 +0.9 28.6 8 Aug 7.3 +0.7 1.7 20 Jun 23.2 41.9 low 55%
Leinster Aero 19.8 +0.1 28.6 8 Aug 7.4 +0.4 0.9 22 Jul 41.6 45.0 average 92%
Leonora 19.7 +0.3 28.2 8 Aug 7.1 +0.3 0.9 6 Jul 21.7 59.7 low 36%
Leonora Aero 20.2   28.9 8 Aug 7.0   0.0 22 Jul 18.8
Munglinup West 17.4 0.0 26.0 24 Aug 7.6 +0.6 2.6 8 Jul 143.2 118.1 high 121%
Norseman Aero 17.9 -0.3 26.1 7 Aug 4.8 +0.5 -3.9 8 Jul 100.4 59.4 v high 169%
Salmon Gums Res.Stn. 17.6 +0.8 25.7 24 Aug 5.4 +0.5 -4.4 8 Jul 88.4 108.3 average 82%
Southern Cross Airfield 18.3 +0.7 26.3 7 Aug 4.3 +0.5 -2.9 6 Jul 62.6 89.7 low 70%
Yeelirrie 20.5 +0.3 28.7 8 Aug         63.5 53.2 average 119%
North East (district 13)
Giles Meteorological Office 21.5 +0.5 31.6 28 Aug 8.5 +0.6 2.1 20 Jul 43.8 39.4 average 111%
Telfer Aero 26.0 -0.3 33.6 27 Aug 12.7 +1.0 6.5 26 Jul 102.6 32.4 high 317%
Warburton Airfield 21.8 +0.3 31.0 11 Aug 8.1 +1.7 0.2 17 Aug 53.8 41.2 high 131%
Wiluna 21.0 +0.6 29.7 25 Aug 7.3 +1.0 1.6 18 Jul 64.8 49.2 high 132%
Offshore Islands (district 200)
Christmas Island Aero 26.5 +0.1 28.7 22 Jun 23.1 +0.5 20.8 19 Jul        
Cocos Island Airport 28.1 -0.1 29.7 13 Jun 24.4 +0.3 22.1 23 Jul 469.0 546.1 average 86%

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 11 am on Monday 2 September 2013. 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.

The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.

Further information

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