Western Australia in February 2011: Wet and cooler than normal for most of WA

  • Rainfall: Second wettest February for WA, but near average in southwest WA
  • Maximum temperature: Third coolest February on record for WA, but above average in southwest WA
  • Minimum temperature: Near average for WA, but equal warmest February on record in southwest WA

Rainfall

Rainfall during February 2011 was above to very much above average for most of WA (see February 2011 rainfall totals & deciles), with areas of highest on record in the Kimberley, Pilbara, Gascoyne and in southeastern WA. In contrast, parts of the Lower West and Southwest saw below to very much below average February rainfall, although February is normally a dry month in the southwest. When averaged across the state, rainfall in February 2011 was the second highest since comparable records commenced in 1900, only behind 1995; while the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) was near average.

Frequent thunderstorm activity, Tropical Cyclone Dianne (16th to 20th), Tropical Cyclone Carlos (21st to 23rd) and a tropical low (26th to 28th) brought heavy rainfall events to the Kimberley, Pilbara, Gascoyne, Goldfields, Interior and Eucla during February resulting in a several sites in these regions breaking their highest daily as well as monthly rainfall records for February.

Warburton in the Interior was affected by flash flooding on the 10th when 58.4 mm was recorded in two hours, and 83.2 mm over 8 hours as the result of slow moving thunderstorms, which was more than twice of the average total rainfall for February. A downpour of 143 mm on the 11th, again as a result of slow moving thunderstorms brought flash flooding to Nungarin in the Central Wheat Belt.

A cloudband associated with TC Dianne produced some exceptionally heavy rainfall in the Gascoyne and Goldfields on the 17th and 18th, with several sites recording daily falls in excess of 100 mm and breaking highest daily rainfall records. TC Carlos, which formed over the Top End of the Northern Territory and caused very heavy rainfall in Darwin, reformed off the Kimberley west coast and brought heavy rainfall as it moved along the northwest coast of WA, passing through Onslow and Exmouth on the 23rd. A tropical low towards the end of February brought further heavy falls with daily rainfall totals of over 100 mm in the Kimberley and Pilbara.

Maximum temperature

Monthly mean maximum temperatures were below to very much below average over much of WA, with an area more than 6 °C below normal in the Eucla district. Ravensthorpe in the Southeast Coastal district experienced its coolest mean daytime temperatures for February in its 48 years of record. In contrast, west coast WA observed above to very much above average daytime temperatures, with Shark Bay and the Southwest Capes regions up to 4 °C above normal (see February 2011 mean maximum temperature decile & anomaly maps), and Lancelin and Cape Naturaliste registered their hottest February since records began.

When averaged across the state, February 2011 was the third coolest February in terms of mean maximum temperature; however the Lower Southwest recorded an above average February. Comparable records began in 1950.

Very hot and humid conditions were experienced in western parts of WA in the latter half of February due to persistent hot and humid northeasterly winds, and a reduction in the seabreeze near the coast. Several sites in the Central West and Central Wheat Belt registered three consecutive days with daily maximum temperature over 40 °C. Many sites recorded either the highest number of days with a maximum temperature over 30 °C in a month for February, or the longest run of consecutive days with a maximum temperature over 30 °C.

Minimum temperature

Mean minimum temperatures were above to very much above average over much of western and southern WA during February 2011 with mean minima 4 to 5 °C above normal in the Central West and southwest Gascoyne. Cape Leeuwin in the Southwest district recorded a mean minimum temperature of 19.5 °C, the warmest February nights ever observed in 114 years of record, whilst several other sites in the Southwest, South Coastal and Central West saw record high minima. In contrast, parts of the Kimberley, as well as a large area in the east Pilbara were below to very much below average, with up to 2 °C below normal mean minima in the inland Pilbara (see December minimum temperature decile & anomaly maps).

When averaged across the state February 2011 the mean minimum for WA was near average, however for the Lower Southwest it was the equal hottest February on record, along with 1985, since comparable records began in 1950.

Many sites in western and southern WA experienced continuous warm nights (when the daily minimum temperature is 20 °C or over) in the latter part of February. Several sites including Perth Metro experienced a record run of warm nights, whilst Kalbarri's run of warm nights commencing 16 January and spanning February with the 44 consecutive warm nights easily passed the previous record run of 19 consecutive warm nights set in 1985 (7 to 25 February).

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Extremes in February 2011
Hottest day 43.7 °C at Eneabba on the 10th
Warmest days on average 37.5 °C at Emu Creek Station
37.5 °C at Gascoyne Junction
Coolest days on average 22.5 °C at Albany
Coldest day 17.7 °C at Jacup on the 5th
Coldest night 8.4 °C at Eyre on the 19th
Coolest nights on average 15.0 °C at Jacup
Warmest nights on average 27.1 °C at Murchison
Warmest night 31.7 °C at Meekatharra Airport on the 10th
Wettest overall 581.5 mm at Doongan
Wettest day 288.2 mm at Varanus Island on the 23rd
Highest wind gust 139 km/h at Varanus Island on the 22nd

Record highest February daily rainfall
Highest daily rainfall
in February 2011 (mm)
Previous highest
for February
Years of
record
Yundamindra 126.0 on the 17th 91.0 on the 26th in 1995 105
Nungarin 72.0 on the 11th 63.8 on the 14th in 1939 102
Laverton 120.2 on the 17th 86.6 on the 3rd in 1918 99
Doolgunna 92.0 on the 17th 88.9 on the 9th in 1963 82
Willigulli North 77.0 on the 21st 76.2 on the 26th in 1915 79
Meekatharra Airport 100.2 on the 12th 69.4 on the 23rd in 2001 66
Mount Padbury 100.1 on the 18th 74.0 on the 8th in 2008 64
Neds Creek 117.6 on the 18th 95.3 on the 14th in 1961 64
Warburton Airfield 83.2 on the 11th 78.0 on the 7th in 1946 53
Badgingarra Research Stn 64.8 on the 9th 53.6 on the 21st in 1986 48
Rawlinna Homestead 42.0 on the 14th 39.6 on the 17th in 2001 47

Record highest total February rainfall
Total rainfall
for February 2011 (mm)
Previous highest
for February
Years of
record
Average for
February
Milly Milly 314.1 178.1 in 1960 110 31.0
Nungarin 154.6 105.7 in 1955 107 18.7
Marron 164.4 122.4 in 1949 100 23.0
Yuin 148.0 122.2 in 1970 93 22.9
Yeelirrie 166.2 148.0 in 1995 83 31.9
Doolgunna 282.6 243.4 in 1960 82 45.1
Eradu 123.4 99.6 in 1915 71 13.5
Mount Padbury 224.7 196.0 in 2008 68 35.0
Neds Creek 263.6 192.6 in 1960 65 51.6
Warburton Airfield 155.4 148.9 in 1960 53 36.1
Mooloo Downs 294.6 168.0 in 1994 50 33.6
Rawlinna Homestead 147.6 119.4 in 2001 48 22.8
Exmouth Town 309.4 192.0 in 1995 41 40.0
Kalbarri 65.7 49.8 in 1994 41 8.7
Camballin 400.0 371.0 in 2004 39 163.1
Karratha Aero 348.8 325.6 in 2006 38 82.6
Kununurra Aero 425.4 414.8 in 2008 38 213.2




Record highest February mean daily maximum temperature
Mean daily maximum
temperature
for February 2011 (°C)
Previous highest
for February
Years of
record
Average for
February
Cape Naturaliste 30.5 29.7 in 1975 107 25.8
Lancelin 33.7 33.1 in 1985 44 29.8



Record lowest February mean daily maximum temperature
Mean daily maximum
temperature
for February 2011 (°C)
Previous lowest
for February
Years of
record
Average for
February
Ravensthorpe 25.3 25.4 in 2002 48 28.4




Record highest February mean daily minimum temperature
Mean daily minimum
temperature
for February 2011 (°C)
Previous highest
for February
Years of
record
Average for
February
Cape Leeuwin 19.5 19.0 in 1921 114 17.2
Bridgetown Comparison 16.6 16.3 in 1955 110 12.2
Donnybrook 18.6 18.2 in 1985 107 14.3
Albany 18.0 17.8 in 1880 94 15.4
Geraldton Airport 23.5 22.5 in 1955 68 19.1
Pemberton 16.2 15.6 in 1961 67 13.6
Albany Airport 16.7 16.6 in 1985 45 14.4
Jurien Bay 21.4 21.1 in 1985 41 17.8
Kalbarri 24.6 23.0 in 1985 37 20.5
Hyden 18.5 18.1 in 1985 35 15.7



Summary statistics for February 2011
Maximum temperatures
for February
(°C)
Minimum temperatures
for February
(°C)
Rainfall
for February
(millimetres)
Mean for
February
2011
Diff
from
average
Highest for
February
2011
Mean for
February
2011
Diff
from
average
Lowest for
February
2011
Total for
February
2011
Average
for
February
Rank of
February
2011
Fraction of
February
average
North Kimberley (district 01)
Doongan 30.7 -1.9 35.2 3rd 22.6 0.0 20.5 4th 581.5 248.3 v high 234%
Kalumburu 31.9 -1.3 34.5 3rd 24.2 -0.3 22.6 1st 284.4 315.5 average 90%
Truscott 30.5   32.5 16th 24.9   22.6 12th 218.0
Wyndham 33.4 -2.6 37.6 3rd 25.0 -0.9 23.0 15th 345.5 205.8 high 168%
Wyndham Aero 33.1 -2.7 37.5 3rd 25.3 -0.6 23.4 15th        
East Kimberley (district 02)
Argyle Aerodrome 32.9 -2.7 38.4 3rd 23.9 -1.4 21.0 12th 294.6 197.2 high 149%
Halls Creek Airport 32.4 -3.2 36.3 3rd 23.2 -0.5 21.0 13th 223.0 143.8 high 155%
Kununurra Aero 32.2 -2.8 37.5 3rd 24.1 -0.7 22.5 12th 425.4 213.2 highest 200%
Warmun 33.2 -2.9 37.9 3rd 23.7 -0.7 21.6 13th 300.4 175.9 high 171%
West Kimberley (district 03)
Bidyadanga 33.4 -0.7 36.5 3rd 24.9 -0.7 22.0 20th 261.3 136.1 high 192%
Broome Airport 32.2 -0.7 34.3 8th 25.5 -0.5 22.4 25th 272.2 179.1 high 152%
Curtin Aero 33.5 -2.0 35.8 4th 24.3 -0.4 22.6 15th 389.6 219.8 high 177%
Derby Aero 32.6 -1.7 34.7 19th 25.2 -0.2 22.9 13th        
Fitzroy Crossing Aero 35.3 -1.2 38.1 4th 24.3 -0.4 21.2 11th 285.0 183.2 high 156%
West Roebuck 33.0   35.0 8th 24.6   22.2 25th 360.8 256.5 average 141%
De Grey (district 04)
Karratha Aero 32.9 -2.5 37.9 5th 25.9 -0.8 23.3 25th 348.8 82.6 highest 422%
Mandora 33.5 -2.1 39.5 26th 25.0 +0.1 22.5 22nd 201.4 101.5 high 198%
Pardoo Station 34.5 -1.0 39.0 28th 24.2 -1.6 20.0 5th 218.6 76.0 v high 288%
Port Hedland Airport 33.6 -2.6 38.7 26th 25.6 +0.1 23.6 12th 295.2 96.1 v high 307%
Roebourne 34.5 -3.5 40.9 27th     22.5 1st 210.3 68.1 v high 309%
Roebourne Aero 33.7   39.4 27th 25.7   23.5 13th 227.2 84.6 high 269%
Fortescue (district 05)
Learmonth Airport 35.0 -2.4 41.6 5th 24.9 +0.9 21.5 28th 200.0 43.6 v high 459%
Mardie 34.1 -3.4 43.1 5th 25.8 +0.5 23.0 25th 335.8 60.3 v high 557%
Onslow 34.3 -1.2 43.0 5th 26.5 +2.3 23.5 23rd 269.9 52.6 v high 513%
Onslow Airport 34.6 -1.7 43.1 5th 26.0 +1.1 22.9 23rd 284.2 64.7 v high 439%
Wittenoom 33.7 -4.1 38.6 3rd 23.9 -1.4 22.0 23rd 294.0 112.2 v high 262%
West Gascoyne (district 06)
Carnarvon Airport 34.1 +1.7 39.6 6th 25.1 +1.8 22.2 8th 91.8 21.0 v high 437%
Denham 34.9 +3.2 40.0 7th 26.4 +3.8 24.4 2nd 90.0 15.5 v high 581%
Emu Creek Station 37.5 -2.7 43.0 5th 25.6 +0.5 21.5 28th 98.3 65.6 high 150%
Gascoyne Junction 37.5 -2.2 42.8 9th 25.7 +1.4 23.0 11th 76.8 30.1 high 255%
Murchison 37.4 -1.0 42.9 10th 27.1 +4.3 15.2 2nd 38.9 35.0 high 111%
Shark Bay Airport 35.5 +1.2 39.8 7th 25.1 +3.2 22.0 4th 147.0 32.9 v high 447%
East Gascoyne (district 07)
Newman Aero 35.2 -1.8 42.5 1st 24.0 +0.1 21.5 12th 145.8 78.8 high 185%
Paraburdoo Aero 36.4 -2.2 40.8 5th 25.0 0.0 22.4 24th 66.0 78.5 average 84%
Murchison (district 07A)
Meekatharra Airport 35.2 -1.5 42.1 4th 23.6 -0.1 20.2 13th 170.2 37.4 v high 455%
Mount Magnet Aero 34.9 -1.6 42.5 2nd 23.4 +0.4 19.8 18th 111.2 39.2 high 284%
North Coast (district 08)
Dalwallinu 34.7 0.0 40.5 26th 20.9 +2.8 16.2 6th 10.4 9.8 average 106%
Dalwallinu Comparison 35.2 +0.6 41.1 26th 21.1 +2.6 16.4 6th 12.3 16.8 average 73%
Geraldton Airport 35.9 +3.4 43.6 10th 23.5 +4.4 18.5 1st 55.6 11.5 v high 483%
Kalbarri 35.9 +1.7 41.0 10th 24.6 +4.1 20.0 3rd 65.7 8.7 highest 755%
Morawa Airport 36.6 +0.1 43.2 10th 22.9 +2.9 19.3 5th 91.2 22.5 v high 405%
Mullewa 36.5 +0.1 43.5 10th 23.3 +3.3 19.8 2nd 165.9 18.6 v high 892%
North Island 31.5 +3.6 35.7 14th 25.0 +3.4 22.0 7th 23.8 4.0 v high 595%
Wongan Hills 34.6 +0.6 41.5 27th 20.1 +2.0 14.7 6th 18.4 15.3 high 120%
Central Coast (district 09)
Badgingarra Research Stn 36.0 +1.3 40.4 27th 20.9 +3.3 16.2 6th 71.0 16.4 v high 433%
Bickley 32.7 +2.2 37.9 27th 17.9 +2.3 12.6 6th 0.4 20.0 low 2%
Champion Lakes 34.1   39.2 28th 21.5   16.5 6th 0.2
Garden Island HSF 31.8   37.5 21st 21.5   16.6 6th 0 9.5 v low 0%
Gingin Aero 35.1 +2.1 40.2 27th 20.6 +4.0 14.8 2nd 43.8 7.7 v high 569%
Gosnells City 35.9 +3.1 40.6 28th     18.0 5th 0.2 15.5 low 1%
Jandakot Aero 34.9 +3.6 39.6 16th 20.5 +3.7 14.0 2nd 0 16.8 lowest 0%
Jurien Bay 34.6 +3.9 40.6 10th 21.4 +3.6 17.5 2nd 0.2 14.7 low 1%
Karnet 32.4 +2.0 37.5 26th 18.4 +2.7 13.5 1st 0.5 20.7 low 2%
Lancelin 33.7 +3.9 38.6 21st 20.7 +2.7 15.7 6th 0 11.2 lowest 0%
Medina Research Centre 34.1 +2.8 40.0 16th 20.6 +3.2 15.2 2nd 0 20.3 v low 0%
Pearce RAAF 35.6 +2.4 40.9 27th 21.2 +3.7 15.5 2nd 1.2 12.0 low 10%
Perth Airport 34.9 +3.1 40.1 28th 20.8 +3.4 16.2 6th 0.4 14.6 low 3%
Perth Metro 34.2 +2.9 39.0 16th/28th 21.0 +3.0 15.8 2nd 0.4 12.7 low 3%
Rottnest Island 30.1 +3.0 35.7 21st 21.7 +2.4 16.5 6th 0 7.3 v low 0%
Swanbourne 34.0 +3.8 39.6 28th 21.0 +2.6 15.9 6th 0.4 6.3 low 6%
South Coast (district 09A)
Albany 22.5 -0.4 24.9 22nd 18.0 +2.6 15.3 6th 18.5 22.9 average 81%
Albany Airport 23.8 -1.1 29.1 22nd 16.7 +2.3 12.5 2nd 11.4 23.0 average 50%
Bridgetown 30.5 +0.6 37.9 25th 16.5 +3.2 12.5 5th 5.2 12.5 average 42%
Bridgetown Comparison 31.4 +1.7 38.5 25th 16.6 +4.4 12.5 5th 5.3 14.6 average 36%
Bunbury 32.9 +3.1 37.6 24th 18.6 +2.9 12.0 1st 0.2 6.4 low 3%
Busselton 32.0 +2.9 36.5 15th 18.4 +3.1 13.0 1st 0.2 4.0 v low 5%
Busselton Aero 32.7 +2.8 37.4 26th 18.0 +3.7 12.9 1st 0 3.2 v low 0%
Cape Leeuwin 25.4 +2.1 32.7 25th 19.5 +2.3 16.6 6th 3.8 16.0 low 24%
Cape Naturaliste 30.5 +4.7 35.4 16th 18.6 +3.0 13.3 5th 2.0 11.5 low 17%
Collie East 32.1   39.2 26th 17.2   11.1 1st 0.2
Donnybrook 33.0 +2.6 39.2 25th 18.6 +4.3 12.2 1st 1.2 15.0 low 8%
Dwellingup 32.8 +3.3 37.6 27th 17.7 +3.2 13.2 1st 0 21.2 lowest 0%
Esperance 24.9 -1.3 28.4 19th 17.3 +1.2 13.7 2nd 27.0 24.4 average 111%
Esperance Aero 26.2 -1.1 31.7 25th 16.4 +0.9 13.0 2nd 34.8 26.2 average 133%
Harvey 33.7 +2.8 38.0 24th 18.7 +2.9 12.5 1st 0 11.7 v low 0%
Hopetoun North 23.6 -2.1 26.0 18th 16.0 +0.3 13.0 2nd        
Jarrahwood 32.3 +2.7 39.5 25th 16.9 +3.4 10.5 5th 1.0 13.3 v low 8%
Mandurah 33.0   38.3 28th 21.4   16.2 1st 0 10.0 v low 0%
Manjimup 29.0 +2.0 36.6 25th 15.5 +2.2 11.1 5th 13.6 18.9 average 72%
North Walpole 24.9   33.3 22nd 16.7   13.7 1st 44.6
Pemberton 28.7 +2.4 37.1 25th 16.2 +2.6 12.1 5th 5.7 19.1 low 30%
Rocky Gully 26.7 -0.7 36.8 25th 15.3 +2.2 11.5 5th 8.8 17.1 average 51%
Windy Harbour 25.1 +1.5 33.0 21st 16.3 +1.8 12.0 3rd 11.6 15.2 average 76%
Witchcliffe 30.1 +3.4 36.1 24th 16.7 +2.5 12.5 6th
North Central (district 10)
Cunderdin Airfield 34.0 0.0 42.3 27th 19.4 +2.1 14.0 6th 7.6 11.6 average 66%
Merredin 32.7 -0.3 42.4 26th 19.2 +1.3 12.8 6th 30.4 15.6 high 195%
Northam 34.3 +0.6 41.5 26th 19.9 +2.7 14.5 6th 8.4 13.2 average 64%
York 34.3 +0.8 42.0 26th 18.8 +2.4 14.0 6th 2.0 12.2 average 16%
South Central (district 10A)
Beverley 33.9 +0.4 41.4 26th 18.9 +2.3 13.8 7th 6.8 13.2 average 52%
Brookton 32.8 +0.6 40.7 26th 18.4 +2.5 13.7 6th 0.6 14.3 low 4%
Corrigin 31.5 0.0 40.5 26th 17.7 +1.8 13.0 6th 3.8 16.4 average 23%
Hyden 32.2 -0.7 41.5 27th 18.5 +2.8 14.5 6th 17.8 19.6 average 91%
Jacup 24.0 -3.4 32.5 25th 15.0 +1.4 11.7 2nd 28.0 21.0 average 133%
Katanning 28.2 -1.5 36.2 25th 15.5 +1.5 12.4 6th 1.8 6.1 average 30%
Katanning Comparison 28.7 -0.8 36.4 25th 15.7 +1.9 13.0 5th 2.9 15.5 average 19%
Lake Grace 29.4 -1.2 36.9 26th 16.5 +1.1 12.5 1st 5.0 12.8 average 39%
Lake Grace Comparison 29.5 -1.2 37.2 27th 16.5 +1.3 12.5 1st 5.0 18.3 average 27%
Narembeen 33.4 +0.4 41.1 26th 18.5 +1.7 12.6 6th 3.8 17.8 average 21%
Narrogin 30.7 +0.5 38.8 26th 16.9 +2.7 11.6 1st 0.6 16.0 low 4%
Newdegate Research Station 29.0 -1.4 37.1 25th 15.5 +1.5 11.2 1st 13.6 21.6 average 63%
Ongerup 25.5 -2.4 33.8 25th 15.7 +1.4 12.6 2nd 9.0 18.2 average 49%
Pingelly 31.7 +0.5 40.0 26th 17.7 +1.8 12.8 1st 0 13.6 lowest 0%
Ravensthorpe 25.3 -3.1 34.0 25th 15.9 +1.4 13.2 6th 47.9 25.0 high 192%
Wagin 30.3 0.0 37.8 26th 16.5 +1.7 12.6 1st 6.4 15.4 average 42%
Wandering 32.2 +0.6 40.0 26th 17.4 +3.1 12.3 1st 0 9.1 v low 0%
Eucla (district 11)
Balgair 26.5 -5.5 37.5 4th     11.0 5th 357.1 38.4 v high 930%
Balladonia 26.6 -4.0 35.0 26th 16.9 +2.1 13.9 19th 43.8 19.5 high 225%
Eucla 23.5 -2.2 34.3 9th 17.8 +0.8 15.1 20th 84.4 18.5 v high 456%
Eyre 24.4 -2.1 31.5 9th 17.0 +0.9 8.4 19th 106.0 16.3 v high 650%
Forrest 25.7 -6.9 36.2 4th 17.1 +0.3 14.2 21st 209.0 31.1 v high 672%
Red Rocks Point 23.0   28.7 9th 18.4   12.4 19th 162.0
South East (district 12)
Bulga Downs 33.1   42.2 4th 21.3   15.1 6th 158.2 30.7 v high 515%
Kalgoorlie-Boulder Airport 28.0 -4.1 39.5 4th 18.1 +0.3 14.4 14th 89.8 31.9 v high 282%
Laverton Aero 30.3 -3.4 40.4 4th 20.0 -0.7 14.3 6th 232.8 69.6 v high 334%
Leonora 31.1 -4.2 42.3 4th 20.4 -0.5 15.1 6th 190.7 31.0 v high 615%
Leonora Aero 31.0   41.2 4th 20.6   15.4 6th 156.6
Munglinup West 26.3   33.7 25th 15.7   13.2 1st 50.2
Norseman 29.6 -1.7 37.5 4th 17.5 +1.6 14.5 6th 13.5 25.0 average 54%
Norseman Aero 29.2 -2.3 37.7 4th 17.5 +1.4 14.5 6th 12.8 32.8 low 39%
Salmon Gums Res.Stn. 28.8 -0.8 35.9 26th 16.1 +2.2 11.3 2nd 8.8 23.7 average 37%
Southern Cross Airfield 31.4 -2.4 38.6 26th 18.8 +1.4 13.8 6th 73.8 26.1 v high 283%
Yeelirrie 33.9 -2.0 42.3 2nd 21.9 +0.6 17.6 6th 166.2 31.9 highest 521%
North East (district 13)
Balgo Hills 36.0 -1.3 38.9 3rd 24.3 -0.2 22.0 11th 70.2 85.2 average 82%
Carnegie 34.8 -2.3 42.4 2nd 23.2 +0.3 17.9 8th 148.0 52.8 high 280%
Giles Meteorological Office 34.7 -1.3 39.2 4th 23.0 +0.1 15.3 7th 113.4 45.6 high 249%
Telfer Aero 36.4 -2.2 43.4 1st 25.0 -0.4 22.7 15th 109.6 100.1 average 109%
Warburton Airfield 34.8 -1.7 42.8 4th 23.2 +1.1 15.1 7th 155.4 36.1 highest 430%
Wiluna 35.5 -1.1 41.0 9th 23.0 +0.9 19.4 13th 88.3 38.1 high 232%

Notes

A Monthly 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 Tuesday 1 March 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

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