Western Australia in February 2012: Warmer nights in Southwest

  • Rainfall: near average for WA.
  • Maximum temperature: near average for WA.
  • Minimum temperature: below average for WA; above average in southwest WA.

Rainfall

Rainfall during February 2012 was below average in the north Kimberley, parts of the Pilbara and inland Gascoyne, and in the eastern Eucla, mainly due to a generally quiet wet season across the north of the state. In contrast, above average rainfall was observed in parts of the western and central Southwest Land Division (SWLD), and the southwest Gascoyne, mainly due to ex-TC Iggy which brought rainfall to the SWLD and neighbouring districts at the beginning of the month. Above average rainfall was also observed in eastern parts of the Interior. When averaged across the state, February 2012 rainfall was near average. The Lower Southwest (southwest a line from Jurien Bay to Bremer Bay) as a whole, as well as the SWLD, also saw near average rainfall for the month.

February 2012 began with Tropical Cyclone Iggy located well west of the Gascoyne coast. Iggy rapidly weakened to be below tropical cyclone strength as it tracked eastward towards the Central West on the 2nd . Ex-TC Iggy brought rainfall to much of the SWLD as it approached the coast and moved across northern parts of the SWLD on the 2nd and 3rd, with some heavy falls during the evening of the 2nd and early on the 3rd in western parts of the Central West and Lower West, mainly in the Perth to Lancelin area where a few sites broke their highest daily rainfall records for February.

A distinct break in the wet season saw generally dry conditions over the northern half of the state over the first few weeks of February, before more widespread shower and thunderstorm activity returned to the Kimberley from the 20th. Apart from TC Iggy early in the month, no other tropical cyclones were observed in the WA region during February 2012. Central and southern parts of the state saw intermittent showers and thunderstorms throughout the month, however, without a strong monsoon to the northwest acting as a moisture source, rainfall was generally close to or below average.

Maximum temperature

Above to very much above average maximum temperatures were observed in the Kimberley during February 2012, with much of the district seeing mean maxima up to 2 °C above normal mainly due to hot dry conditions in the early and middle stages of the month. Coastal parts of the Eucla, and western parts of the Southwest district also saw above average daytime temperatures, whilst the remainder of the state was mostly near average. Only central eastern parts of the Interior reported below average maximum temperatures, with means to 2 °C below normal. When averaged across the state, the mean maximum temperature for WA during February 2012 was near average. Daytime temperatures over the Lower Southwest although near normal were marginally cooler than the long-term average during February 2012, which is the first month that a below normal mean maximum has been recorded in the region since December 2010, and only the second below average month since October 2009.

February 2012 began with a hot day over the SWLD, continuing the hot spell that began late January, before a cooler change due to the passage of ex-TC Iggy and a developing ridge extended across the division on the 2nd, extending across much of southern WA in subsequent days. A break in the wet season saw hot conditions across parts of northern WA for much of the beginning of the month, extending into central parts of the state mid-month, with many stations regularly observing mid-40 °C temperatures, and Roebourne recorded the hottest day for WA in February 2012 with 45.7 °C. A broad trough over central WA allowed hot conditions to extend into the southeast of the state during mid-February, with temperatures exceeding 40 °C, before a ridge brought a cool change on the 20th. A trough near the west coast on the 22nd moved slowly eastwards through the SWLD and southeast of the state from the 22nd to the 25th, bringing very hot conditions east of the trough, particularly in south coast districts.

Minimum temperature

February 2012 saw above average mean minimum temperatures over most of the SWLD and adjacent western Goldfields, and in isolated parts near the coast in the Gascoyne, west Pilbara and north Kimberley. Below to very much below normal overnight temperatures were experienced in much of the west and south Kimberley, east Pilbara, Interior and Eucla, with areas 2 to 3 °C below average in the southeastern Interior and western Eucla. When averaged across the state, the mean minimum temperature for WA was below average. In contrast, the Lower Southwest recorded above average overnight temperatures, continuing a run of consecutive above average monthly minima that started in November 2010.

A hot night was observed in eastern parts of the SWLD on the 2nd, with cloudy conditions and warm northerly winds resulting in Hyden in the Great Southern recording its hottest night in 37 years of record. Cool nights extended across southern WA from the 5th due to a ridge to the south, and dominated most of the state through to the 12th. The passage of troughs during the middle and latter parts of the month brought warm nights to central and southern WA, however, the month ended with a ridge directing cooler air across much of the southern half.

Other Phenomena

Tropical Cyclone Iggy formed to the northwest of Exmouth, off the west Pilbara coast, on the morning of 26 January 2012 and remained offshore to the west of WA as it moved southward. On 1 February, Iggy was located approximately 500 km west of the Gascoyne coast and moved in a generally southerly direction as a category 2 system but tracked more to the southeast as the day progressed and rapidly weakened to be below tropical cyclone strength on the morning of the 2nd as it tracked eastward towards the Central West. Ex-TC Iggy moved through northern parts of the SWLD on the 3rd and brought heavy rainfall to locations in the northern Lower West and southern Central West, as well as near gale force winds to coastal locations in the Central West. As Iggy moved parallel with the west coast in late January and early February, an associated tidal surge was recorded at most towns from Onslow to Perth, the peak being 80 cm at Geraldton and 70 cm at Fremantle on 2 February.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in February 2012
Hottest day 45.7 °C at Roebourne on the 16th
Warmest days on average 39.5 °C at Marble Bar
Coolest days on average 23.1 °C at Albany
Coldest day 16.6 °C at Rocky Gully on the 3rd
Coldest night 3.1 °C at Eyre on the 11th
Coolest nights on average 13.2 °C at Rocky Gully
Warmest nights on average 27.6 °C at Varanus Island
26.3 °C at Karratha Aero (mainland)
Warmest night 30.1 °C at Barrow Island Airport on the 14th
29.7 °C at Wittenoom on the 14th
Wettest overall 223.9 mm at Kachana
Wettest day 121.2 mm at Troughton Island on the 1st
107.4 mm at Kachana on the 28th
Highest wind gust 130 km/h at Leonora Aero on the 18th

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 February daily rainfall
Highest daily rainfall
in February 2012 (mm)
Previous wettest
for February
Years of
record
Dandaragan West 56.2 on the 3rd 49.2 on the 22nd in 1986 55
Lancelin 73.0 on the 3rd 46.4 on the 9th in 1992 47
Bindoon 46.6 on the 3rd 36.1 on the 12th in 1966 30



Record highest February daily minimum temperature
Highest daily minimum
temperature
in February 2012 (°C)
Previous warmest
for February
Years of
record
Average for
February
Hyden 26.5 on the 2nd 25.5 on the 27th in 1997 37 15.8


Summary statistics for February 2012
Maximum temperatures
for February
(°C)
Minimum temperatures
for February
(°C)
Rainfall
for February
(millimetres)
Mean for
February
2012
Diff
from
average
Highest for
February
2012
Mean for
February
2012
Diff
from
average
Lowest for
February
2012
Total for
February
2012
Average
for
February
Rank of
February
2012
Fraction of
February
average
North Kimberley (district 01)
Kalumburu 34.0 +0.9 37.4 15th 23.2 -1.2 21.0 1st 163.0 304.6 low 54%
Mount Elizabeth 34.0 +1.9 37.5 16th 21.6 -0.2 18.0 12th 113.5 224.9 low 50%
Troughton Island 32.1 +0.7 34.2 15th 26.8 +0.7 22.0 1st 223.6 197.9 average 113%
Wyndham 37.5 +1.5 40.9 15th 26.0 +0.1 23.0 24th 122.4 203.9 low 60%
Wyndham Aero 37.9 +2.4 41.4 15th 26.0 +0.2 22.7 23rd 109.6 215.0 low 51%
East Kimberley (district 02)
Argyle Aerodrome 38.1 +2.6 41.9 14th 25.0 -0.2 20.4 20th 90.8 189.6 low 48%
Halls Creek Airport 36.4 +0.8 40.4 16th 23.3 -0.4 19.7 3rd 126.8 143.6 average 88%
Kununurra Aero 36.9 +2.0 40.6 10th 24.0 -0.8 21.1 10th 138.8 211.3 low 66%
Warmun 37.6 +1.5 42.0 11th 23.7 -0.7 18.0 3rd 98.3 175.6 average 56%
West Kimberley (district 03)
Bidyadanga 35.0 +0.9 40.7 8th 24.8 -0.8 21.0 8th 186.7 136.5 high 137%
Broome Airport 34.2 +1.3 40.2 12th 25.5 -0.5 21.5 20th 147.8 178.7 average 83%
Curtin Aero 36.4 +1.0 40.5 12th 23.6 -1.1 18.5 8th 166.4 216.9 average 77%
Cygnet Bay         24.6 -0.6 20.0 12th 48.6 194.4 low 25%
Derby Aero 35.2 +0.9 39.6 12th 24.6 -0.8 21.1 8th 122.6 198.4 average 62%
Fitzroy Crossing Aero 38.2 +1.7 42.2 17th 23.3 -1.4 17.8 7th 89.6 177.0 v low 51%
West Roebuck 35.4 +1.7 40.9 12th 24.1 -1.0 19.8 11th        
De Grey (district 04)
Bedout Island 33.2   36.0 13th 27.4   23.0 25th
Karratha Aero 36.9 +1.6 43.1 14th 26.3 -0.4 22.6 10th 0.2 80.5 low 0%
Legendre Island 34.5   41.7 14th 27.3   21.4 25th
Mandora 36.5 +0.9 41.8 9th 23.9 -1.0     56.9 101.0 average 56%
Marble Bar 39.5 0.0 43.8 16th 25.0 -1.3 19.7 8th 40.2 79.9 low 50%
Pardoo Station 37.1 +1.6 44.4 14th 24.2 -1.6 20.4 9th 28.3 75.6 average 37%
Port Hedland Airport 36.7 +0.6 42.3 14th 24.5 -1.0 20.9 8th 14.4 94.8 low 15%
Roebourne 39.2 +1.2 45.7 16th 26.0 -0.2 22.4 12th 0.8 67.5 low 1%
Roebourne Aero 38.3 +0.6 44.2 16th 25.4 -1.0 21.8 11th 1.4 77.1 low 2%
Fortescue (district 05)
Barrow Island Airport 34.1 +0.9 37.3 12th 27.0 +0.9 24.8 6th 2.2 59.9 low 4%
Learmonth Airport 37.8 +0.4 43.3 13th 23.5 -0.6 20.5 26th 30.6 43.7 average 70%
Mardie 38.2 +0.8 44.8 14th 25.4 +0.1 23.3 10th 7.2 60.4 low 12%
Onslow 36.6 +1.1 45.2 13th 25.8 +1.6 23.1 27th 3.8 52.2 average 7%
Onslow Airport 37.6 +1.3 44.8 13th 25.6 +0.7 23.1 27th 1.0 63.4 low 2%
Wittenoom 37.6 -0.2 42.1 16th 25.2 -0.1 20.6 7th 2.0 110.4 v low 2%
West Gascoyne (district 06)
Carnarvon Airport 32.8 +0.4 42.4 29th 23.7 +0.4 20.3 26th 15.2 20.9 average 73%
Denham 31.3 -0.5 39.5 29th 24.1 +1.3 21.0 5th 2.0 15.4 average 13%
Emu Creek Station 39.3 -0.9 42.0 19th 24.4 -0.7 20.9 26th 6.9 64.8 low 11%
Murchison 37.8 -0.6 41.5 19th 22.6 -0.2 19.0 26th 22.6 34.5 average 66%
Shark Bay Airport 34.3 -0.1 40.8 6th 22.3 +0.1 19.6 13th 2.4 30.3 average 8%
East Gascoyne (district 07)
Newman Aero 37.4 +0.5 42.1 16th 23.4 -0.5 16.8 8th 20.4 77.3 low 26%
Paraburdoo Aero 39.4 +0.9 44.3 18th 24.7 -0.3 21.5 9th 73.6 78.3 average 94%
Murchison (district 07A)
Meekatharra Airport 36.7 +0.1 41.6 17th 23.0 -0.7 16.6 6th 15.2 37.0 average 41%
Mount Magnet Aero 36.8 +0.4 40.9 15th 22.5 -0.5 15.6 6th 5.6 37.2 low 15%
North Coast (district 08)
Carnamah 35.1 -0.4 42.5 20th 19.6 +0.5 13.7 5th 9.5 14.5 average 66%
Dalwallinu 33.9 -0.8 40.8 10th 18.3 0.0 11.9 5th 23.4 10.7 high 219%
Dalwallinu Comparison 33.9 -0.7 39.4 22nd 18.8 +0.3 12.3 5th 25.2 16.9 high 149%
Eneabba 35.7 -0.5 43.3 20th 20.3 +0.8 14.9 6th 5.1 12.9 average 40%
Geraldton Airport 31.7   40.0 7th 20.2   13.9 27th 2.2
Kalbarri 32.7 -1.5 39.4 29th 20.1 -0.4 12.0 28th 12.5 8.8 high 142%
Morawa Airport 36.3 -0.3 42.4 20th 20.0 -0.2 13.6 6th 6.8 21.5 average 32%
Mullewa 35.6 -0.8 42.5 20th 20.1 +0.1 15.3 25th 11.4 18.6 average 61%
North Island 29.4 +1.2 33.1 1st 22.8 +0.9 18.3 8th 5.8 4.1 high 141%
Wongan Hills 33.7 -0.3 40.4 1st 18.6 +0.5 11.5 5th 25.6 15.4 high 166%
Central Coast (district 09)
Badgingarra Research Stn 32.4 -2.3 39.6 20th 18.2 +0.5 12.3 5th 37.6 15.7 high 239%
Bickley 28.9 -1.7 37.2 10th 16.2 +0.5 9.2 5th 27.0 20.1 average 134%
Champion Lakes 30.6   38.8 10th 19.1   12.7 5th 11.6
Garden Island HSF 27.9 -0.5 37.3 1st 20.0 +0.7 13.9 5th 10.4 9.6 high 108%
Gingin Aero 31.7 -1.4 40.3 10th 17.7 +0.8 11.1 26th 46.4 10.1 v high 459%
Jandakot Aero 30.9 -0.6 40.3 10th 17.8 +0.8 8.8 26th 16.6 16.8 high 99%
Jurien Bay 30.5 -0.2 39.0 7th 19.1 +1.3 13.0 27th 26.0 15.0 high 173%
Karnet 29.0 -1.5 37.8 22nd 16.0 +0.3 9.0 5th 24.8 20.8 high 119%
Lancelin 30.2 +0.4 37.5 9th 19.3 +1.3 13.3 27th 73.0 12.5 v high 584%
Medina Research Centre 30.7 -0.7 40.0 10th 18.7 +1.2 11.7 26th 14.6 20.1 high 73%
Pearce RAAF 32.1 -1.1 40.3 10th 18.1 +0.6 11.0 26th 24.4 12.3 high 198%
Perth Airport 31.3 -0.6 40.3 10th 18.3 +0.8 9.6 26th 17.8 14.6 high 122%
Perth Metro 31.1 -0.4 40.1 10th 19.1 +0.9 12.1 26th 23.6 12.6 high 187%
Rottnest Island 27.3 +0.1 35.5 1st 20.3 +0.9 14.6 5th 19.2 11.5 high 167%
Swanbourne 30.3 -0.1 40.2 10th 19.1 +0.5 13.1 5th 23.8 7.2 v high 331%
South Coast (district 09A)
Albany 23.1 +0.2 28.5 11th 17.0 +1.6 12.6 10th 8.2 22.8 low 36%
Albany Airport 25.0   35.0 23rd 14.5   9.7 25th 6.4
Albany Airport Comparison 25.0 +0.1 34.3 23rd 14.5 +0.1 10.7 19th 5.6 22.6 low 25%
Bridgetown 28.8 -1.1 37.9 1st 13.9 +0.4 6.5 5th 14.6 12.6 high 116%
Bridgetown Comparison 29.3 -0.3 37.9 1st 14.4 +2.2 7.4 6th 10.8 14.5 average 74%
Bunbury 29.6 -0.4 38.9 22nd 16.5 +0.7 8.7 5th 16.4 7.0 high 234%
Busselton Aero 29.8 -0.3 36.6 1st 15.2 +0.6 8.3 5th 8.2 3.5 high 234%
Cape Leeuwin 24.5 +1.2 28.6 10th 18.8 +1.6 15.9 8th 9.4 16.0 average 59%
Cape Naturaliste 27.7 +1.9 33.2 22nd 16.8 +1.2 10.8 5th 13.0 11.5 high 113%
Collie East 29.6   38.7 22nd 13.9   5.5 5th 14.6 6.4 v high 228%
Donnybrook 30.4 0.0 38.6 1st 16.0 +1.7 8.3 5th 20.5 15.1 high 136%
Dwellingup 29.8 +0.3 38.7 22nd 15.5 +1.0 7.9 5th 8.2 21.1 average 39%
Esperance 25.9 -0.3 42.4 23rd 16.4 +0.3 11.7 1st 13.8 24.1 average 57%
Esperance Aero 27.0 -0.3 41.6 23rd 15.4 -0.2 11.3 10th 15.4 26.0 average 59%
Harvey 30.4 -0.5 39.2 22nd 15.9 +0.1 8.0 5th 12.0 11.7 average 103%
Hopetoun North 25.7 +0.1 43.5 23rd 16.2 +0.4 12.9 1st 25.0 20.4 average 123%
Jarrahwood 30.0 +0.4 38.5 1st 14.2 +0.7 5.2 5th 7.6 13.2 average 58%
Mandurah 29.6 0.0 35.8 22nd 19.9 +0.6 13.4 5th 8.2 9.8 average 84%
Manjimup 27.4 +0.4 36.5 1st 14.1 +0.7 9.7 5th 7.6 18.8 average 40%
North Walpole 24.9   36.1 1st 15.2   11.5 25th 17.0
Pemberton 26.9 +0.6 36.4 1st 14.5 +0.9 9.9 6th 20.3 19.1 average 106%
Rocky Gully 26.5 -0.8 36.7 1st 13.2 -0.1 9.0 5th 11.6 16.8 average 69%
Windy Harbour 23.8 +0.2 31.2 1st 15.6 +1.1 11.0 8th 23.0 15.5 high 148%
Witchcliffe 27.5 +0.5 36.4 1st 15.1 +0.6 10.2 6th 6.8 8.8 average 77%
North Central (district 10)
Bencubbin 33.4 -0.1 39.5 23rd 18.4 +0.3 10.0 5th        
Cunderdin Airfield 33.7 -0.3 42.3 22nd 17.8 +0.4 10.3 5th 22.4 12.6 high 178%
Kellerberrin 33.5 +0.2 40.9 22nd 17.1 +0.2 9.3 5th 27.0 14.6 high 185%
Merredin 33.9 +0.9 41.2 23rd 18.5 +0.5 9.7 5th 11.6 15.5 average 75%
Northam 33.2 -0.5 41.9 22nd 17.7 +0.5 10.7 5th 37.7 13.4 v high 281%
York 32.9 -0.6 42.0 22nd 16.5 -0.1 8.1 5th 33.2 13.5 high 246%
South Central (district 10A)
Beverley 32.8 -0.7 40.8 22nd 17.1 +0.5 8.8 5th 39.6 13.4 high 296%
Brookton 31.2 -1.1 40.8 23rd 16.5 +0.5 8.9 5th 27.2 14.5 high 188%
Corrigin 31.3 -0.2 39.8 22nd 16.7 +0.8 10.5 5th 25.8 16.5 high 156%
Hyden 33.1 +0.2 41.8 23rd 16.5 +0.7 9.7 6th 11.6 19.5 average 59%
Jacup 27.5 +0.3 41.1 23rd 13.7 0.0 8.0 27th 12.6 20.5 average 61%
Katanning 28.9 -0.7 37.7 22nd 14.4 +0.3 9.4 5th 14.4 6.7 high 215%
Katanning Comparison 28.9 -0.6 37.8 22nd 14.9 +1.1 9.0 27th 11.6 15.5 average 75%
Lake Grace 29.7 -0.8 39.4 22nd 15.8 +0.3 10.7 6th 17.0 13.1 high 130%
Lake Grace Comparison 29.6 -1.1 39.6 22nd 15.7 +0.5 10.6 6th 17.2 18.3 average 94%
Narembeen 33.4 +0.4 40.5 22nd 17.5 +0.6 8.9 5th 26.8 17.9 high 150%
Narrogin 29.9 -0.3 40.0 22nd 15.6 +1.3 7.7 5th 11.6 15.9 average 73%
Newdegate Research Station 30.0 -0.3 40.3 23rd 13.7 -0.4 6.2 27th 30.6 21.7 high 141%
Ongerup 27.8 -0.1 38.5 23rd 14.8 +0.5 10.4 26th 17.6 18.2 average 97%
Pingelly 30.6 -0.6 40.3 22nd 16.3 +0.3 8.8 5th 30.4 13.7 high 222%
Ravensthorpe 28.6 +0.2 41.2 23rd 15.3 +0.8 8.8 5th 15.6 24.9 average 63%
Wagin 30.2 -0.1 39.5 22nd 14.9 +0.1 8.5 5th 5.1 15.4 average 33%
Wandering 31.1 -0.5 40.0 22nd 15.3 +0.8 6.5 5th 8.4 9.1 average 92%
Eucla (district 11)
Balladonia 31.2 +0.6 39.9 17th 14.4 -0.4 7.0 6th 11.4 19.4 average 59%
Eucla 27.4 +1.7 42.7 24th 16.8 -0.2 10.6 11th 1.4 18.4 low 8%
Eyre 28.4 +1.9 43.1 24th 13.8 -2.3 3.1 11th 16.0 16.3 high 98%
Forrest 32.3 +0.1 42.6 25th 15.0 -1.8 9.2 10th 0 29.4 v low 0%
Red Rocks Point 25.6   43.9 24th 17.5   11.1 7th 7.8
South East (district 12)
Bulga Downs 37.5   43.0 17th 20.5   13.4 5th 8.0 30.4 average 26%
Kalgoorlie-Boulder Airport 32.4 +0.3 42.6 17th 18.5 +0.7 9.5 5th 17.0 31.6 average 54%
Laverton Aero 34.5 +0.9 42.3 17th 20.7 0.0 13.0 5th 25.2 67.1 average 38%
Leinster Aero 35.6 +0.4 42.5 17th 21.8 -0.4 14.0 6th 22.2 41.2 average 54%
Leonora 35.4 +0.1 43.9 16th 20.5 -0.4 12.0 5th 18.1 30.9 average 59%
Munglinup West 28.8   42.6 23rd 14.7   9.9 5th 15.6 28.4 average 55%
Norseman Aero 31.5 +0.2 40.8 17th 15.6 -0.6 6.3 6th 8.4 30.9 low 27%
Salmon Gums Res.Stn. 29.9 +0.4 41.3 23rd 13.9 -0.1 5.2 6th 9.2 23.5 average 39%
Southern Cross Airfield 33.5 -0.2 41.1 16th 17.9 +0.4 9.4 5th 13.8 25.3 average 55%
Yeelirrie 36.1 +0.2 42.3 16th 20.6 -0.7 10.9 6th 15.1 31.7 average 48%
North East (district 13)
Balgo Hills 38.0 +0.7 43.5 16th 24.4 -0.1 22.1 20th 106.9 85.6 average 125%
Carnegie 37.0 0.0 42.8 18th 21.8 -1.1 15.0 6th 20.7 52.8 average 39%
Giles Meteorological Office 35.1 -0.9 42.7 17th 20.2 -2.7 13.1 2nd 58.6 46.0 high 127%
Telfer Aero 39.0 +0.4 44.6 15th 24.6 -0.7 20.1 7th 2.8 97.6 v low 3%
Warburton Airfield 35.3 -1.2 43.3 18th 20.1 -2.0 14.6 7th 58.0 36.5 high 159%
Offshore Islands (district 200)
Christmas Island Aero 28.1 +0.2 29.7 24th 23.0 +0.4 21.7 5th 246.8 345.8 average 71%
Cocos Island Airport 30.3 +0.4 31.1 3rd 25.2 +0.2 23.1 8th 191.2 184.6 average 104%
Varanus Island 33.5 +1.1 37.7 13th 27.6 +1.1 25.2 24th 3.2 67.8 average 5%

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 10 am on Thursday 1 March 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.
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