Western Australia in autumn 2012: Warm & dry autumn for southwest

  • Rainfall: Near average for WA; 7th driest autumn for southwest WA
  • Maximum temperature: average for WA; 5th warmest autumn for southwest WA
  • Minimum temperature: 5th coolest autumn for WA; near average for southwest WA

Rainfall

Rainfall during autumn 2012 was below to very much below average over much of western WA, particularly in the Southwest Land Division (SWLD) where a number of sites in the west and south observed their driest autumn on record. Below to very much below average rainfall was also evident in the central and southern Interior and Eucla. In contrast, above to very much above average rainfall was observed through most of the Kimberley and adjacent parts of the Pilbara and northern Interior, as well as small patches through central WA, primarily due to a monsoonal burst in mid-March and the passage of tropical cyclone Lua across the Pilbara coast and through central parts of the state. When averaged across the state as a whole, rainfall for autumn 2012 was near average, mostly due to generally above average rainfall in March along with a dry April and a very dry May.

Rainfall in the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) during autumn 2012 was very much below average and ranked as the 7th driest autumn since comparable records commenced in 1900, largely due to the Lower Southwest recording its 5th driest March, a near average April, and a below average May. For the SWLD, rainfall in autumn 2012 ranked as the 5th driest on record.

Significant rainfall events during autumn 2012

  • Tropical cyclone Lua crossed the Pilbara coast near Pardoo Roadhouse on 17 March and weakening over the eastern Gascoyne as it tracked southwards through central WA over subsequent days. Edjudina in the Goldfields registered 75.0 mm on the 19th when ex-tropical cyclone Lua passed through the region, the wettest March day in its 104 years of daily rainfall records. Troughton Island in the north Kmberley recorded a daily total of 260.6 mm on the 14th, which was the third wettest day in 27 years of record at the site and the highest daily rainfall in WA for autumn 2012.
  • Dampier Downs in the west Kimberley recorded 341.6 mm in March, exceeding its previous wettest March of 340.3 mm in 2007, whilst Home Valley in the north Kimberley received 1194.0 mm, the wettest spot in WA during March 2012. From the 10th to the 15th, Home Valley experienced the brunt of a monsoonal burst with many days close to or over 100 mm, and one daily fall
    of 244.0 mm on the 13th.

Maximum temperature

Mean daily maximum temperatures during autumn 2012 mirrored the rainfall pattern, with above to very much above average daytime maxima in western and southeastern parts, and below to very much below average conditions in much of the Kimberley and adjacent parts of the Pilbara and northern Interior, as well as small patches through central WA. Areas of up to 3 °C below normal were evident in the east Kimberley, whilst small areas of up to 3 °C above normal mean maxima were observed between Carnarvon in the Gascoyne and Kalbarri in the Central West.

When averaged across the state, the mean maximum temperature for WA during autumn 2012 was near average; however, the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) saw its 5th warmest autumn on record, following on from its 2nd warmest autumn in 2011. Comparable temperature records commenced in 1950.

Minimum temperature

Minimum temperatures were below to very much below average during autumn 2012 in the Kimberley, east Pilbara, east Gascoyne, northern Goldfields and in parts of the Interior, with mean minima up to 3 °C below normal in the southeast Kimberley and eastern Interior. Above average mean maxima were evident in coastal parts of the west Pilbara, west Gascoyne, and western and southern SWLD, while the remainder of the state was near average.

When averaged across the state, the mean minimum temperature for WA during autumn 2012 was very much below average, and the 5th lowest since comparable records commenced in 1950, whilst the the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) was near average.

Eyre in the Eucla district experienced its coldest autumn nights in 50 years of record with a mean mininum temperature of 10.1 °C, 0.1 °C lower than its previous record set in autumn 1995.

Very cold nights were experienced during the latter part of May in the Lower Southwest due to a strong high pressure system stationed in the Bight. Numerous sites in the region recorded sub-zero temperatures and several sites recorded their coldest autumn night on record either on the 24th or 25th. Northam in the Central Wheat Belt registered -2.3 °C on the 25th, which was the lowest autumn temperature in 105 years of record at the site. Many sites in the Kimberley and Pilbara also experienced relatively cold nights in the last few days of autumn. Broome Airport registered a daily minimum temperature of 8.1 °C on the 27th followed by 7.7 °C on the 28th, breaking the previous the autumn record of 8.4 °C on the 28 May 1966 on consecutive days. Mount Elizabeth observed -0.9 °C on the 28th which was the first recorded sub-zero temperature in autumn in the Kimberley.

Notable Events

  • Tropical cyclone Lua formed to the northwest of Karratha, well off the west Pilbara coast, on the afternoon of 13 March 2012. Lua moved northwestward and intensified to category two on the 15th before taking a u-turn and moving southeastward towards the WA coast. Lua intensified further to category three on the 16th and took a south-southeast track on the 17th as it intensified to category four and approached the east Pilbara coast. Lua crossed the coast near Pardoo Roadhouse on the afternoon of the 17th as a category four system. After landfall, Lua tracked southwards through the inland Pilbara and steadily weakened to below tropical cyclone strength on the morning of the 18th in the northeast Gascoyne. Significant damage was reported from Pardoo Roadhouse and the Yarrie mine site with uprooted trees and damage to buildings. Lua caused moderate to major flooding of the De Grey river system in the east Pilbara, particularly in the vicinity of Tumbinna Pool and Nullagine. Ex-tropical cyclone Lua moved through the Goldfields, Southeast Coastal, and Eucla between the 19th and 20th, bringing some heavy rainfall.
  • A line of thunderstorms formed from around Cranbrook to Mt Barker to Albany around midday on 13 May. Large hail (1-2cm) was reported from the Stirling Ranges (east of Cranbrook) through to the Porongorup National Park with tree and car damage also reported.

Further information

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Extremes in autumn 2012
Hottest day 44.6 °C at Kalbarri on 9 Mar
Warmest days on average 35.3 °C at Mardie
Coolest days on average 22.3 °C at Albany
Coldest day 13.5 °C at Rocky Gully on 31 May
Coldest night -3.4 °C at Wandering on 25 May
Coolest nights on average 8.4 °C at Collie East
Warmest nights on average 25.9 °C at Troughton Island
22.8 °C at Truscott
Warmest night 29.0 °C at Varanus Island on 9 Mar
29.0 °C at Onslow on 10 Mar
Wettest overall 1184 mm at Home Valley
Wettest day 260.6 mm at Troughton Island on 14 Mar
244.0 mm at Home Valley on 13 Mar
Highest wind gust 109 km/h at Varanus Island on 15 Mar
106 km/h at Cape Leeuwin on 7 May

Maps
ObservedAnomalyDecile 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

Click on a map to show it full size in a pop-up window


Record highest autumn daily rainfall
Highest daily rainfall
in autumn 2012 (mm)
Previous wettest
for autumn
Years of
record
Edjudina 75.0 on 19 Mar 66.8 on 19 Mar 1927 104



Record lowest total autumn rainfall
Total rainfall
for autumn 2012 (mm)
Previous driest
for autumn
Years of
record
Average for
autumn
Barberton 12.0 17.3 in 1914 101 100.3
Manjimup 85.8 107.8 in 1964 96 220.3
Windrush 72.4 94.3 in 1969 52 160.5
Eneabba 12.7 38.8 in 1985 45 109.6
Jerramungup 37.8 38.9 in 1983 45 108.7
Mettler 52.9 55.8 in 1996 44 150.8

 



Record lowest autumn temperature
Lowest temperature
in autumn 2012 (°C)
Previous coolest
for autumn
Years of
record
Average for
autumn
Northam -2.3 on 25 May -2.2 on 31 May 1964 105 11.9
Broome Airport 7.7 on 28 May 8.4 on 28 May 1966 73 22.1
Ongerup -0.9 on 25 May 0.1 on 22 May 1968 45 11.0
Beverley -1.8 on 25 May -0.6 on 22 May 2007 43 11.3
Pingelly 0.4 on 25 May 0.6 on 30 May 2006 42 11.8
Wagin -0.7 on 25 May 0.1 on 18 Apr 1991 40 10.7
Jarrahwood -3.0 on 24 May -2.5 on 26 May 2006 33 9.1



Record lowest autumn mean daily minimum temperature
Mean daily minimum
temperature
for autumn 2012 (°C)
Previous coolest
for autumn
Years of
record
Average for
autumn
Eyre 10.1 10.2 in 1995 50 11.8



Summary statistics for autumn 2012
Maximum temperatures
for autumn
(°C)
Minimum temperatures
for autumn
(°C)
Rainfall
for autumn
(millimetres)
Mean for
autumn
2012
Diff
from
average
Highest for
autumn
2012
Mean for
autumn
2012
Diff
from
average
Lowest for
autumn
2012
Total for
autumn
2012
Average
for
autumn
Rank of
autumn
2012
Fraction of
autumn
average
North Kimberley (district 01)
Doongan 31.1 -1.4 35.0 7 Apr 17.4 -1.1 5.1 31 May 685.4 291.3 high 235%
Kalumburu 32.8 -1.0 36.8 20 Apr 19.5 -1.0 7.6 29 May        
Mount Elizabeth 30.8 -0.8 34.7 21 Apr 15.5 -0.9 -0.9 28 May 286.9 218.2 high 131%
Troughton Island 31.4 -0.5 33.8 16 Apr 25.9 -0.3 21.2 30 May 531.2 217.4 v high 244%
Truscott 31.5   34.1 19 Apr 22.8   14.2 29 May  
Wyndham 33.3 -1.8 37.5 4 Apr 21.8 -1.4 11.0 30 May 355.8 207.0 high 172%
Wyndham Aero 34.0 -1.3 38.3 20 Apr 21.7 -1.0 9.6 27 May 264.8 196.9 high 134%
East Kimberley (district 02)
Argyle Aerodrome 32.6 -1.3 37.6 6 Apr 20.7 -1.4 9.9 30 May 332.2 195.6 high 170%
Halls Creek Airport 30.9 -2.1 37.3 4 Apr 18.4 -1.6 9.1 26 May 202.8 116.0 high 175%
Kununurra Aero 33.1 -1.4 37.1 5 Apr 20.3 -1.4 8.6 30 May 471.8 193.7 v high 244%
Warmun 32.7 -1.7 38.0 7 Apr 19.6 -0.8 8.0 27 May 167.6 156.9 average 107%
West Kimberley (district 03)
Bidyadanga 33.7 -0.8 38.2 9 Apr 20.7 -1.1 10.2 27 May 381.6 148.6 v high 257%
Broome Airport 32.5 -0.8 36.6 8 Apr 20.5 -1.6 7.7 28 May 247.4 155.2 high 159%
Curtin Aero 33.9 -1.3 38.4 4 Apr 20.4 -1.5 9.0 26 May 498.2 242.6 high 205%
Cygnet Bay 31.3 -1.5 34.9 2 Apr 20.8 -1.2 11.5 21 May 382.3 253.0 high 151%
Derby Aero 33.1 -1.4 37.2 7 Apr 20.6 -1.6 9.4 26 May 316.6 180.2 high 176%
Fitzroy Crossing Aero 33.9 -1.5 38.7 7 Apr 18.3 -1.9 6.0 28 May 271.6 169.6 high 160%
West Roebuck 33.6 -0.7 37.8 5 Apr 19.1 -1.7 5.5 27 May 295.2 221.9 average 133%
De Grey (district 04)
Karratha Aero 33.0 -0.4 39.6 3 Apr 21.1 -1.1 10.8 31 May 58.2 94.3 average 62%
Legendre Island 30.8   35.4 8 Mar 24.1   16.9 31 May
Marble Bar 33.7 -1.2 39.8 29 Mar 19.7 -1.7 9.5 27 May 94.6 115.0 average 82%
Port Hedland Airport 32.9 -1.3 38.5 29 Mar 19.8 -1.3 8.3 25 May 173.4 99.5 high 174%
Roebourne 34.3 -0.1 42.0 3 Apr 21.0 -0.9 11.7 31 May 85.2 120.6 average 71%
Roebourne Aero 34.0 -1.1 41.1 3 Apr 19.5 -1.8 7.9 31 May 110.4 69.8 high 158%
Fortescue (district 05)
Barrow Island Airport 30.5 -0.1 35.5 30 Mar 23.7 -0.4 16.3 28 May 31.0 161.9 low 19%
Learmonth Airport 33.6 +0.9 39.6 30 Mar 19.2 -0.6 8.3 31 May 17.0 97.5 low 17%
Mardie 35.3 +0.3 40.9 6 Mar 20.2 -0.5 9.6 31 May 4.8 106.0 low 5%
Onslow 33.3 +0.8 39.5 30 Mar 21.7 +1.7 11.5 29 May 25.1 113.1 low 22%
Onslow Airport 34.4 +1.4 40.2 30 Mar 21.3 +0.4 11.6 25 May 6.4 136.1 v low 5%
Wittenoom 32.2 -0.3 38.4 30 Mar 19.7 -0.8 10.5 26 May 30.6 125.2 low 24%
West Gascoyne (district 06)
Carnarvon Airport 31.3 +2.4 41.5 6 Mar 18.4 -0.3 7.7 27 May 63.2 65.8 average 96%
Denham         20.7 +1.4 11.5 31 May 11.2 65.5 v low 17%
Emu Creek Station         19.8 -0.4 8.9 31 May 74.4 95.7 average 78%
Murchison 31.8 +1.2 41.0 8 Mar 14.9 -0.9 3.1 27 May 16.6 75.3 v low 22%
Shark Bay Airport 32.3 +1.5 41.9 6 Mar 18.0 0.0 7.2 31 May 8.8 48.2 low 18%
East Gascoyne (district 07)
Newman Aero                 67.0 75.6 average 89%
Paraburdoo Aero 32.2 -0.8 39.1 15 Mar 18.1 -1.1 5.3 31 May 94.4 89.7 average 105%
Murchison (district 07A)
Meekatharra Airport 28.7 -0.4 38.3 14 Mar 16.0 -0.8 6.2 24 May 68.2 72.2 average 94%
Mount Magnet Aero 28.8 +0.3 39.7 13 Mar 15.2 -0.8 4.5 24 May 67.6 74.1 average 91%
North Coast (district 08)
Dalwallinu 27.6 +0.6 39.3 12 Mar 12.7 -0.5 4.0 24 May        
Dalwallinu Comparison 27.7 +1.0 39.5 12 Mar 13.6 +0.1 5.2 25 May 10.8 89.9 v low 12%
Geraldton Airport 29.8   43.5 9 Mar 15.3   7.8 27 May 23.0
Geraldton Airport Comparison 29.6 +2.0 42.8 9 Mar 15.5 +0.1 8.5 25 May 29.0 108.5 v low 27%
Kalbarri 31.3 +2.0 44.6 9 Mar 16.9 +0.7 7.2 22 May 56.2 88.2 average 64%
Morawa Airport 29.5 +0.7 41.0 9 Mar 13.7 -0.6 2.5 24 May 17.0 66.2 v low 26%
Mullewa 30.2 +1.5 40.8 9 Mar 15.5 +0.7 6.1 24 May 26.8 84.0 v low 32%
North Island 27.7 +1.5 37.4 6 Mar 21.0 +0.7 12.5 30 May 27.2 62.3 low 44%
Wongan Hills 27.6 +1.3 40.5 12 Mar 13.2 0.0 3.5 25 May 28.9 94.9 v low 30%
Central Coast (district 09)
Badgingarra Research Stn 28.0 +0.7 40.1 9 Mar 14.2 +0.7 6.7 25 May        
Bickley 24.0 +0.3 38.1 12 Mar 12.7 +0.3 5.2 25 May 140.2 207.7 low 68%
Champion Lakes 26.0   39.6 11 Mar 15.2   6.5 25 May 112.8
Garden Island HSF 24.8 +0.6 37.7 11 Mar 16.0 0.0 8.6 25 May 114.8 129.8 average 88%
Gingin Aero 27.5 +0.8 41.2 12 Mar 12.4 +0.3 0.2 25 May 69.2 118.7 low 58%
Gooseberry Hill 26.1 +0.5 40.5 10 Mar 14.8 +0.4 7.5 24 May
Gosnells City                 105.9 164.7 low 64%
Jandakot Aero 26.7 +0.9 40.2 11 Mar 12.2 -0.1 -0.6 25 May 123.2 164.7 low 75%
Jurien Bay 27.7 +1.4 40.0 9 Mar 14.5 +0.4 4.0 24 May 72.9 121.0 low 60%
Karnet 24.1 +0.6 38.2 11 Mar 11.7 +0.1 1.1 25 May        
Lancelin 27.3 +1.8 40.7 9 Mar 14.9 +0.3 5.9 24 May 55.4 129.5 low 43%
Medina Research Centre 26.8 +1.1 41.1 11 Mar 13.6 +0.4 2.7 25 May 149.0 159.3 average 94%
Pearce RAAF 27.5 +1.2 41.8 12 Mar 13.3 -0.1 1.6 24 May 72.4 133.7 low 54%
Perth Airport 27.0 +1.3 40.9 11 Mar 13.3 +0.2 3.7 26 May 89.8 156.1 low 58%
Perth Metro 27.0 +1.1 41.1 11 Mar 13.6 0.0 1.3 25 May 118.4 181.6 low 65%
Rottnest Island 24.8 +1.2 37.5 11 Mar 17.6 +0.5 12.4 24 May 82.4 151.7 low 54%
Swanbourne 26.6 +1.1 39.4 11 Mar 15.1 +0.1 6.6 25 May 141.8 147.3 average 96%
South Coast (district 09A)
Albany 22.3 +1.8 37.3 6 Mar 14.0 +1.3 5.0 24 May 163.0 224.4 low 73%
Albany Airport 23.1   38.2 6 Mar 11.7   2.2 24 May 138.8
Bridgetown 24.3 +0.7 38.3 10 Mar 8.7 -0.5 -2.2 24 May 100.2 165.8 low 60%
Bridgetown Comparison 24.9 +1.7 38.5 11 Mar 9.0 +0.4 -1.3 25 May 97.0 181.0 v low 54%
Bunbury 25.0 +0.7 37.8 11 Mar 11.5 -0.2 -0.1 25 May 131.8 141.9 average 93%
Busselton Aero 24.8 +0.6 37.1 10 Mar 10.7 -0.5 0.4 25 May 64.4 149.0 v low 43%
Cape Leeuwin 22.7 +1.7 37.9 6 Mar 16.2 +0.9 9.0 24 May 229.0 226.6 average 101%
Cape Naturaliste 23.8 +2.0 33.2 11 Mar 14.8 +1.0 9.0 24 May 84.0 181.2 v low 46%
Collie East 24.5   38.4 11 Mar 8.4   -3.1 25 May 99.0 147.4 average 67%
Donnybrook 25.4 +1.4 39.8 11 Mar 11.7 +1.2 2.3 24 May 133.6 206.5 low 65%
Dwellingup 24.2 +1.6 38.3 11 Mar 10.5 +0.2 -1.2 25 May 200.7 249.4 low 80%
Esperance 23.9 +1.0 40.7 12 Mar 13.4 +0.3 6.5 28 May 128.2 144.3 average 89%
Esperance Aero 23.9 +0.8 39.6 12 Mar 12.5 -0.1 5.6 28 May 104.2 140.5 low 74%
Harvey 25.5 +0.3 39.2 11 Mar 12.2 -0.4 3.5 25 May 127.4 169.3 low 75%
Hopetoun North 23.9 +0.6 41.3 12 Mar 12.9 +0.4 4.3 29 May 76.8 112.5 low 68%
Jarrahwood 25.2 +1.4 38.5 11 Mar 8.5 -0.6 -3.0 24 May 116.2 190.2 low 61%
Mandurah 25.0 +0.7 34.4 9 Mar 16.0 +0.2 6.9 25 May 114.2 151.8 average 75%
Manjimup 23.3 +2.1 37.8 6 Mar 11.2 +0.5 3.8 25 May 85.8 220.3 lowest 39%
North Walpole 22.4   38.1 6 Mar 12.9   4.9 24 May 210.6
Pemberton 23.2 +1.9 37.5 5 Mar 11.8 +0.8 3.9 24 May 164.1 261.3 v low 63%
Rocky Gully 23.0 +1.0 37.1 5 Mar 10.9 0.0 2.2 24 May 77.4 158.6 v low 49%
Windy Harbour 22.5 +0.7 39.4 6 Mar         229.0 241.5 average 95%
Witchcliffe 23.5 +0.7 36.7 6 Mar 11.5 +0.4 0.6 24 May 256.0 217.5 high 118%
North Central (district 10)
Bencubbin 26.8 +0.9 39.5 12 Mar 13.0 +0.3 2.6 24 May 28.4 82.3 v low 35%
Cunderdin Airfield 27.6 +1.1 41.5 12 Mar 11.1 -0.8 -1.2 25 May 22.4 69.4 v low 32%
Kellerberrin 27.3 +1.8 41.0 12 Mar         21.0 83.6 v low 25%
Merredin 27.3 +1.9 40.7 12 Mar 12.4 -0.2 1.0 25 May 24.4 83.9 v low 29%
Northam 27.7 +1.6 41.9 12 Mar         24.0 96.6 v low 25%
York 27.3 +1.0 41.5 12 Mar         33.9 76.1 low 45%
South Central (district 10A)
Beverley         10.9 -0.4 -1.8 25 May 46.0 92.9 low 50%
Brookton 25.9 +1.0 40.6 12 Mar 11.0 0.0 -1.5 25 May 48.0 100.5 low 48%
Corrigin 25.7 +1.5 40.0 12 Mar 10.6 -0.4 -2.0 25 May 24.2 90.8 v low 27%
Hyden 26.8 +1.3 41.1 12 Mar 11.0 0.0 -1.6 25 May 40.0 81.6 low 49%
Katanning 23.9 +0.5 39.1 12 Mar 10.8 -0.1 0.8 24 May 56.4 92.6 low 61%
Katanning Comparison 24.1 +1.4 39.2 10 Mar 10.1 -0.2 -1.0 24 May 51.6 112.5 v low 46%
Lake Grace 24.7 +0.5 39.3 10 Mar 11.7 +0.1 0.2 25 May 45.4 67.6 low 67%
Lake Grace Comparison 24.9 +1.0 39.2 10 Mar 11.6 +0.2 0.5 25 May 43.8 88.1 low 50%
Narembeen 26.9 +1.2 40.1 12 Mar 11.6 -0.1 0.7 25 May 44.9 81.7 low 55%
Narrogin 24.5 +1.5 38.7 12 Mar 10.8 +0.4 -1.0 25 May 53.6 112.8 low 48%
Newdegate Research Station 25.0 +0.9 39.3 12 Mar 9.0 -1.1 -2.3 25 May
Ongerup 23.9 +1.4 38.4 12 Mar 11.2 +0.2 -0.9 25 May 63.4 92.0 average 69%
Pingelly 25.4 +1.3 40.1 12 Mar 11.7 -0.1 0.4 25 May 46.4 101.6 low 46%
Ravensthorpe 24.6 +1.1 38.9 10 Mar 12.3 +0.7 4.5 25 May 57.0 108.1 low 53%
Wagin 24.5 +0.9 39.5 10 Mar 10.3 -0.4 -0.7 25 May 62.1 103.0 low 60%
Wandering 25.0 +0.4 39.8 12 Mar 9.1 -0.3 -3.4 25 May 95.2 93.9 average 101%
Eucla (district 11)
Balladonia 25.3 +0.6 39.0 12 Mar 10.9 +0.1 0.4 31 May        
Eucla 24.7 +1.4 38.9 13 Mar 12.9 -0.4 4.4 31 May 75.4 80.2 average 94%
Eyre 25.3 +1.7 39.5 12 Mar 10.1 -1.7 -2.0 10 May 61.2 90.9 average 67%
Forrest 27.1 +1.4 39.0 13 Mar 10.6 -1.1 0.0 31 May 11.4 64.2 v low 18%
Red Rocks Point 23.8   38.9 19 Mar 13.8   5.5 31 May 32.4
South East (district 12)
Bulga Downs 28.3   39.5 13 Mar 12.6   1.7 31 May        
Kalgoorlie-Boulder Airport 25.3 +0.2 38.3 12 Mar 12.4 -0.1 2.1 25 May 75.0 71.5 average 105%
Laverton Aero 27.0 +0.7 38.7 13 Mar 13.8 -0.7 3.1 25 May 61.2 69.2 average 88%
Leonora 27.1 -0.7 39.6 13 Mar 13.2 -1.3 2.9 25 May 75.2 73.2 average 103%
Leonora Aero 27.1   39.3 13 Mar 13.4   2.0 31 May 67.2
Munglinup West 24.5   39.6 12 Mar 11.6   4.8 25 May 68.0 108.4 low 63%
Norseman Aero 25.0 0.0 38.7 12 Mar 10.2 -0.5 -1.1 25 May 71.2 74.3 average 96%
Salmon Gums Res.Stn. 24.7 +1.1 39.2 7 Mar 9.1 -0.8 -1.4 29 May 78.0 86.2 average 90%
Southern Cross Airfield 26.2 +0.1 39.7 12 Mar 10.8 -0.5 -1.0 25 May 37.6 90.5 low 42%
Yeelirrie                 94.0 81.3 average 116%
North East (district 13)
Carnegie 30.4 +0.7 38.9 30 Mar 14.7 -0.9 2.6 31 May 27.3 71.8 average 38%
Giles Meteorological Office 28.7 -0.2 38.3 1 Apr 14.4 -1.7 1.9 24 May 10.6 71.0 low 15%
Telfer Aero 33.3 -0.3 40.2 29 Mar 19.1 -0.8 7.3 31 May 61.2 117.6 average 52%
Warburton Airfield 29.5 +0.4 39.3 1 Apr 14.6 -0.5 1.6 23 May 1.8 64.8 v low 3%
Offshore Islands (district 200)
Cocos Island Airport 30.0 +0.4 31.2 6 Mar 25.5 +0.4 22.5 21 May 467.6 678.6 low 69%
Varanus Island 30.7 +0.1 34.6 8 Mar 25.6 +0.1 20.0 25 May 31.0 111.4 low 28%

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 10 am on Friday 1 June 2012. 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
(03) 9669 4057
Enquiries