Western Australia in October 2011: Third wettest October on record

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.
  • Rainfall: 3rd wettest October for WA; above average for southwest WA
  • Maximum temperature: Near average for WA
  • Minimum temperature: Above average for WA; 3rd warmest for southwest WA.

Rainfall

October 2011 rainfall was above to very much above average for most of WA, with sites in the Central West, Central Wheat Belt, Great Southern, Southeast Coastal, Goldfields, western Interior, and Kimberley registering their wettest October on record, and notably a significant number of these sites have over 100 years of rainfall recording history. Below average rainfall was mainly confined to western parts of the Southwest district, and parts of Pilbara (see October 2011 rainfall totals & deciles. When averaged across the state, October 2011 was the 3rd wettest October on record for WA (comparable records commenced in 1900), whilst the Southwest Land Division (SWLD) recorded its 7th wettest October.

A low pressure system over central WA combined with a middle level disturbance in the first few days of the month to bring widespread rainfall to the southern half of WA. Moderate to heavy rainfall with daily rainfall totals over 40 mm was reported at a number of locations in the southern Gascoyne, Central West, and Central Wheat Belt on the 3rd, with a few sites recording their highest daily October rainfall as a result, whilst further significant falls were reported in the Goldfields in the 24 hours to 9am on the 4th. Showers and thunderstorms brought isolated moderate falls to the SWLD, Goldfields and Eucla between the 7th and 12th, with Windrush in the South Coastal on the 9th, and Goomaling in the Central Wheat Belt on the 11th, recording October daily rainfall records. A cold front on the 18th brought some moderate falls to the SWLD, and a series of middle level disturbances brought showers and thunderstorms to large parts of the state in the last 11 days of October as moderate to heavy falls were reported and many sites in different regions of the state recorded their highest daily rainfall for October on record.

Maximum temperature

October 2011 maximum temperatures were near average across most of WA. Areas of above to very much above average maxima were observed in the western coastal strip south of Shark Bay, with mean maxima up to 2 °C above normal in western parts of the Lower West and Southwest. Below average maxima were experienced in southern parts of the Kimberley, near the west Pilbara coast, the southern Gascoyne, and Goldfields, where daytime temperatures were up to 2 °C below normal (see October 2011 mean maximum temperature deciles & anomaly maps).

When averaged across the state, the maximum temperature during October 2011 for WA was close to normal. The Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) also experienced near average daytime temperatures during October 2011, however, mean maximum temperatures for the Lower Southwest in each month of 2011 have been above the long-term average (comparable records commenced in 1950). As a result, the mean maximum temperature for the Lower Southwest for the 2011 January to October period is the highest on record.

Minimum temperature

October 2011 mean minimum temperatures were above to very much above average over much of WA including the southern half of the state and extending to the western and southern Pilbara and central Interior. Very much above average minima were recorded across the SWLD, Eucla, and southern Interior, with some areas reporting up to 3 °C warmer than normal mean minima, and several sites across the SWLD recorded their highest October mean minimum temperature. Below to very much below average mean minima were confined to the north and west Kimberley, with areas of up to 2 °C cooler than normal mean minima reported (see October 2011 minimum temperature deciles & anomaly maps).

October 2011 was above average when looking at WA as a whole, whilst the Lower Southwest ranked as the 3rd warmest October on record in terms of mean minimum temperature. Comparable records commenced in 1950.

Other Phenomena

Severe thunderstorms developed in the Southeast Coastal district and neighbouring areas during the afternoon on the 12th and a farmer near Salmon Gums reported hail to appoximately 4cm diameter. Roof damage was reported in Kununurra on the 21st as the result of wind gusts from an afternoon storm, whilst large hail that smashed car windscreens was reported at Ellendale, also in the Kimberley, on the 22nd. Geraldton was impacted on the 26th as shops in the main street reported minor inundation as a result of heavy rainfall, whilst Sandstone in the Gascoyne received minor damage to buildings after hail and severe wind gusts passed through the region on the same day.

Further information

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Extremes in October 2011
Hottest day 44.0 °C at Wyndham Aero on the 12th
Warmest days on average 38.7 °C at Wyndham Aero
Coolest days on average 18.4 °C at Albany
Coldest day 13.9 °C at North Walpole on the 8th
Coldest night -0.1 °C at Salmon Gums Res.Stn. on the 20th
Coolest nights on average 8.5 °C at Newdegate Research Station
Warmest nights on average 25.7 °C at Troughton Island
24.7 °C at Wyndham (mainland)
Warmest night 28.4 °C at Wyndham on the 28th
Wettest overall 161.6 mm at Mount Elizabeth
Wettest day 64.0 mm at Doongan on the 31st
Highest wind gust 91 km/h at Cape Leeuwin on the 13th


Record highest October daily rainfall
Highest daily rainfall
in October 2011 (mm)
Previous highest
for October
Years of
record
Leonora 34.4 on the 27th 29.6 on the 3rd in 1997 107
Yundamindra 50.0 on the 27th 44.2 on the 22nd in 1930 105
Wongan Hills 53.2 on the 3rd 35.8 on the 29th in 1929 104
Goomalling 34.4 on the 11th 30.2 on the 15th in 1975 101
Bullfinch 43.0 on the 25th 34.0 on the 12th in 1982 100
Mukinbudin 42.0 on the 25th 34.4 on the 15th in 1975 81
Xantippe 29.6 on the 25th 18.0 on the 30th in 1977 69
Paynes Find 36.4 on the 3rd 21.3 on the 23rd in 1966 50
Esperance Aero 43.8 on the 23rd 43.2 on the 18th in 1995 42
Windrush 36.6 on the 9th 35.0 on the 9th in 2007 41
Mount Elizabeth 62.0 on the 26th 52.2 on the 31st in 2010 39
Telfer Aero 21.6 on the 31st 19.0 on the 29th in 1999 38
Beaumont West 37.0 on the 23rd 26.0 on the 18th in 1995 30


Record highest total October rainfall
Total rainfall
for October 2011 (mm)
Previous highest
for October
Years of
record
Average for
October
Geraldton Town 97.4 85.2 in 1947 114 18.2
Leonora 73.0 55.8 in 1975 114 9.7
Codg Codgen 84.8 71.1 in 1932 110 18.0
Laverton 65.0 57.0 in 2001 109 9.4
Yundamindra 95.5 57.2 in 2001 109 11.2
Goomalling 99.0 78.2 in 1899 107 20.9
Ejanding 60.8 48.3 in 1975 105 15.8
Edjudina 109.5 79.9 in 1909 104 11.6
Wongan Hills 121.6 65.5 in 1966 104 20.1
Dalwallinu Comparison 83.2 74.2 in 1975 100 17.3
Lake Grace Comparison 78.2 78.1 in 1935 100 23.1
Nyabing 109.6 96.8 in 1965 96 28.6
Sandsprings 96.4 83.2 in 1958 96 22.3
Konnongorring 123.4 60.5 in 1916 89 19.2
Salmon Gums Res.Stn. 103.6 83.9 in 1932 80 27.5
Wongan Hills Res.Station 102.6 54.0 in 1947 74 18.7
Eradu 61.6 57.0 in 1916 70 18.5
Xantippe 67.6 43.3 in 1977 70 11.8
Carnegie 54.4 46.7 in 1975 56 5.6
Amery Acres 47.6 42.7 in 1965 54 17.9
Spring Valley 59.0 43.3 in 1966 51 17.7
Lort River 77.6 76.2 in 1975 43 27.8
Jurien Bay 84.6 66.6 in 2008 41 27.1
Mount Elizabeth 161.6 151.4 in 2010 39 31.7
Karara 51.0 41.2 in 1939 33 10.8
Anro 64.6 49.8 in 1990 30 19.2

Record highest October mean daily minimum temperature
Mean daily minimum
temperature
for October 2011 (°C)
Previous highest
for October
Years of
record
Average for
October
Pemberton 11.6 10.7 in 1963 69 8.6
Brookton 9.8 9.4 in 1976 43 7.3
Ongerup 9.8 9.7 in 2009 43 8.1
Jurien Bay 14.0 12.8 in 2008 42 11.1
Hyden 10.1 10.0 in 2009 39 8.1
Jarrahwood 9.4 9.3 in 1976 30 7.3



Summary statistics for October 2011
Maximum temperatures
for October
(°C)
Minimum temperatures
for October
(°C)
Rainfall
for October
(millimetres)
Mean for
October
2011
Diff
from
average
Highest for
October
2011
Mean for
October
2011
Diff
from
average
Lowest for
October
2011
Total for
October
2011
Average
for
October
Rank of
October
2011
Fraction of
October
average
North Kimberley (district 01)
Doongan 36.1 -0.8 40.2 12th 20.7 -0.7 16.5 4th 121.3 34.3 v high 354%
Kalumburu 35.7 -1.2 38.5 28th 21.3 -1.3 18.1 4th 51.0 40.4 high 126%
Mount Elizabeth 35.2 -0.8 38.9 14th 19.6 +0.5 15.3 19th 161.6 31.7 highest 510%
Troughton Island 30.8 -0.9 32.3 24th 25.7 -0.6 24.3 17th 0.2 2.9 average 7%
Truscott 33.4   36.0 18th 24.1   21.4 17th 19.4
Wyndham 37.9 -0.9 42.5 12th 24.7 -1.1 20.7 17th 29.6 22.7 high 130%
Wyndham Aero 38.7 -0.6 44.0 12th 24.4 -0.5 20.7 18th 35.2 19.7 high 179%
East Kimberley (district 02)
Argyle Aerodrome 37.7 -0.5 42.3 12th 24.5 -0.6 20.2 18th 61.4 35.3 high 174%
Halls Creek Airport 36.3 -0.8 40.4 15th 22.4 -0.3 17.5 18th 31.0 17.6 high 176%
Kununurra Aero 37.6 -1.0 41.6 12th 22.4 -1.3 17.9 18th 44.4 23.1 high 192%
Warmun 38.0 -0.6 42.0 12th 23.1 +0.1 19.0 1st 15.5 23.4 average 66%
West Kimberley (district 03)
Bidyadanga 32.4 -1.8 41.6 16th 20.8 -0.2 15.2 5th 0 1.0 lowest 0%
Broome Airport 31.3 -1.6 40.5 16th 22.3 0.0 14.9 5th 0 1.4 lowest 0%
Curtin Aero 37.6 -1.2 41.5 16th 20.3 -1.4 14.8 5th 0.4 5.4 average 7%
Derby Aero 36.0 -1.1 39.7 14th 21.9 -1.2 16.9 5th 0 2.7 lowest 0%
Fitzroy Crossing Aero 38.3 -1.6 42.3 15th 22.0 -0.9 17.4 5th 9.8 19.1 average 51%
West Roebuck 33.8 -1.9 42.3 16th 19.9 -0.8 14.5 5th 0 3.2 v low 0%
De Grey (district 04)
Karratha Aero 32.6 -1.2 38.6 25th 19.9 -0.7 16.3 4th 0 0.3 lowest 0%
Legendre Island 29.9   35.1 23rd 22.0   18.9 3rd
Marble Bar 37.7 -0.6 41.7 25th 20.6 -0.7 15.6 7th 0 3.0 v low 0%
Pardoo Station 34.7 -0.8 39.5 25th         0 0.7 lowest 0%
Port Hedland Airport 34.1 -0.7 40.5 17th 18.5 +0.1 12.7 4th 0.2 0.9 average 22%
Roebourne 35.5 -0.1 40.1 17th 19.6 0.0 15.8 6th 0 0.7 lowest 0%
Roebourne Aero 35.5 -1.5 40.2 17th 19.0 -0.6 14.0 6th 0 1.1 v low 0%
Fortescue (district 05)
Barrow Island Airport 28.7 -0.6 33.7 15th 21.4 -0.1 17.8 31st 0.4 2.7 high 15%
Learmonth Airport 32.3 -0.3 37.8 15th 16.6 +0.3 12.0 11th 0 1.7 lowest 0%
Mardie 33.1 -1.8 38.7 15th 17.4 +0.1 13.3 5th 0 0.9 lowest 0%
Onslow 31.1 -0.6 36.7 25th 18.3 +1.6 14.3 3rd 0 0.8 lowest 0%
Onslow Airport 31.8 -1.0 37.6 22nd 18.3 +0.6 15.1 3rd 0.2 0.8 average 25%
Wittenoom 35.7 +0.4 39.0 17th 21.3 +0.6 16.4 4th 0 3.6 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 26.6 +0.7 34.9 15th 17.5 +1.2 11.9 4th 6.0 5.4 high 111%
Denham 26.1 +0.7 34.5 15th 18.4 +2.0 14.5 20th 12.6 6.2 v high 203%
Emu Creek Station 33.4 -0.9 40.3 15th         0 2.1 lowest 0%
Gascoyne Junction 31.8 -0.4 39.5 16th 16.4 +1.1 12.0 3rd 1.7 4.3 average 40%
Murchison 29.3 -1.2 38.5 16th 14.2 +1.3 8.0 1st 22.8 5.2 v high 438%
Shark Bay Airport 27.9 -0.1 37.1 15th 15.7 +0.5 12.5 1st 7.6 5.4 average 141%
East Gascoyne (district 07)
Newman Aero 34.6 -0.3 39.4 26th 18.7 +1.4 12.4 4th 21.0 5.1 high 412%
Paraburdoo Aero 34.8 -0.9 38.6 16th 18.5 +0.4 14.3 4th 0 3.6 lowest 0%
Murchison (district 07A)
Meekatharra Airport 29.0 -0.6 36.0 17th 16.0 +0.9 11.1 5th 17.8 6.4 v high 278%
Mount Magnet Aero 27.6 -1.5 35.2 16th 15.1 +0.9 10.8 19th 32.4 7.0 v high 463%
North Coast (district 08)
Carnamah 26.5 +0.5 37.8 16th 12.4 +2.1 6.5 14th 55.1 16.9 v high 326%
Dalwallinu 25.7 -0.4 35.5 16th 11.4 +2.0 6.4 20th 82.4 14.9 v high 553%
Dalwallinu Comparison 25.3 0.0 34.9 16th 11.9 +1.7 7.2 14th 83.2 17.3 highest 481%
Geraldton Airport 25.1   34.7 21st 12.8   7.4 20th 100.6
Geraldton Airport Comparison 25.1 +0.7 34.9 21st 12.8 +1.9 7.0 20th 89.4 19.8 v high 452%
Kalbarri 26.4 +0.2 36.0 21st 14.1 +1.6 9.2 10th 43.5 15.1 v high 288%
Morawa Airport 27.5 -0.5 37.7 16th 12.4 +1.7 6.8 14th 25.4 9.3 high 273%
Mullewa 27.4 +0.3 38.0 16th 13.3 +2.3 8.7 19th 28.9 13.2 v high 219%
North Island 23.9 +0.8 26.6 30th 17.6 +0.6 12.2 1st 35.0 9.2 v high 380%
Wongan Hills 24.9 -0.1 35.5 16th 10.8 +0.8 5.0 14th 121.6 20.1 highest 605%
Central Coast (district 09)
Badgingarra Research Stn 24.5 +0.2 36.4 16th 11.0 +1.7 2.0 14th 39.6 29.7 high 133%
Bickley 21.2 +0.2 32.9 16th 11.0 +1.6 6.2 19th 78.8 67.2 average 117%
Champion Lakes 23.2   34.0 16th 13.5   8.4 19th 11.4
Garden Island HSF 22.0   34.5 16th 14.3   9.3 7th 29.6 31.8 average 93%
Gingin Aero 24.4 +0.4 37.1 16th 11.8 +3.0 5.5 5th 70.8 38.9 high 182%
Gooseberry Hill 22.6 -0.3 34.0 16th 12.4 +1.2 8.3 19th
Gosnells City 24.9 +1.2 36.9 16th         48.4 46.9 average 103%
Jandakot Aero 23.9 +1.4 35.8 16th 11.7 +2.3 5.4 5th 59.0 47.3 high 125%
Jurien Bay 24.6 +1.3 34.0 29th 14.0 +2.9 9.8 20th 84.6 27.1 highest 312%
Karnet 21.4 +0.7 32.7 16th 10.4 +1.5 5.6 5th 40.3 78.2 low 52%
Lancelin 24.2 +1.8 35.5 16th 12.9 +1.0 8.0 14th 32.0 29.4 high 109%
Medina Research Centre 23.8 +1.3 36.8 16th 12.7 +2.5 6.0 19th 35.4 41.2 average 86%
Pearce RAAF 23.9 +0.6 35.5 16th 12.0 +2.0 4.9 19th 60.0 37.1 high 162%
Perth Airport 24.2 +1.6 36.1 16th 12.2 +2.0 6.8 14th 62.4 44.8 high 139%
Perth Metro 24.3 +1.3 36.3 16th 13.0 +1.8 7.2 14th 64.2 52.2 high 123%
Rottnest Island 21.4 +1.2 29.3 16th 15.0 +1.3 12.1 19th 75.6 37.1 v high 204%
Swanbourne 23.8 +1.9 35.9 16th 13.7 +1.7 8.1 19th 64.2 43.8 high 147%
South Coast (district 09A)
Albany 18.4 0.0 22.5 16th 12.7 +2.3 6.1 20th 50.8 79.2 low 64%
Albany Airport 18.8 +0.1 23.9 16th 10.6 +1.5 4.1 20th 58.0 71.8 average 81%
Bridgetown 20.9 +0.8 30.4 16th 9.1 +2.6 2.1 20th 58.4 44.6 average 131%
Bridgetown Comparison 21.9 +1.3 32.4 16th 9.4 +2.6 3.3 20th 55.0 62.0 average 89%
Bunbury 21.8 +1.0 30.0 16th 11.0 +1.9 4.3 20th 33.2 31.8 average 104%
Busselton 22.1 +1.4 27.3 16th 11.1 +1.5 5.4 19th
Busselton Aero 22.7 +1.7 29.4 16th 10.0 +1.7 4.1 19th 26.6 31.6 average 84%
Cape Leeuwin 19.1 +0.9 21.5 16th 13.8 +1.3 10.7 20th 68.8 65.4 average 105%
Cape Naturaliste 21.2 +2.4 26.7 16th 12.0 +1.0 8.4 20th 29.0 50.4 low 58%
Collie East 21.8   32.6 16th 9.2   2.2 19th 56.2
Donnybrook 22.8 +1.7 33.9 16th 10.9 +2.6 5.4 19th 34.6 64.0 low 54%
Dwellingup 21.9 +2.0 33.1 16th 10.2 +2.3 4.3 19th 38.2 80.3 low 48%
Esperance 21.6 +0.6 36.5 17th 11.9 +1.2 6.1 20th 46.6 46.7 average 100%
Esperance Aero 22.0 +1.0 37.6 17th 10.9 +1.3 4.2 20th 85.8 46.8 v high 183%
Harvey 22.2 +1.1 32.0 16th 10.4 +0.9 4.0 19th 42.4 49.7 average 85%
Hopetoun North 20.8 -0.7 31.0 16th 11.9 +1.9 5.2 20th 66.8 40.0 high 167%
Jarrahwood 22.2 +1.7 31.5 16th 9.4 +2.1 1.5 20th 24.4 58.1 v low 42%
Mandurah 22.9 +1.5 29.6 16th 14.4 +1.4 10.4 19th 27.8 32.6 average 85%
Manjimup 20.3 +1.6 30.2 16th 9.6 +1.4 4.4 19th 59.2 76.7 average 77%
North Walpole 19.0   27.6 16th 11.0   6.4 20th 133.8
Pemberton 20.2 +1.5 30.0 16th 11.6 +3.0 6.5 19th 111.0 90.6 high 123%
Rocky Gully 19.9 +1.1 29.1 16th 9.4 +1.6 3.9 19th 120.2 55.9 v high 215%
Shannon 19.2 +0.6 28.6 16th 9.4 +1.4 3.1 20th 99.8 77.8 high 128%
Windy Harbour 18.9 +0.2 21.3 30th         98.5 68.9 high 143%
Witchcliffe 20.4 +1.3 27.9 16th 10.1 +1.1 4.5 19th 58.6 65.3 average 90%
North Central (district 10)
Bencubbin 25.1 0.0 34.5 16th 12.0 +2.3 5.5 14th 52.5 15.7 v high 334%
Cunderdin Airfield 25.3 -0.4 35.6 16th 10.1 +2.3 3.6 14th 68.6 17.3 v high 397%
Kellerberrin 24.7 0.0 35.5 16th 9.5 +0.7 4.2 14th 58.0 18.3 v high 317%
Merredin 25.2 +0.5 33.8 16th 11.7 +2.2 3.5 14th 55.8 18.3 v high 305%
Northam 24.8 +0.8 35.5 16th 10.6 +1.7 4.5 14th 61.2 24.8 v high 247%
York 24.2 -0.3 35.0 16th 9.7 +2.6 2.4 20th 61.6 24.0 v high 257%
South Central (district 10A)
Beverley 24.3 0.0 34.8 16th 10.0 +2.2 4.4 14th 67.8 23.7 v high 286%
Brookton 23.3 +0.1 35.2 16th 9.8 +2.5 3.2 14th 51.3 25.7 v high 200%
Corrigin 23.7 +0.6 34.0 16th 9.8 +1.7 4.5 14th 42.2 21.3 high 198%
Hyden 24.9 +0.3 34.5 16th 10.1 +2.0 3.9 20th 49.1 21.8 v high 225%
Jacup 21.7 +0.3 32.1 16th 9.2 +1.8 2.1 20th 90.2 44.6 high 202%
Katanning 21.7 +0.2 32.5 16th 8.6 +1.5 1.0 20th 76.8 31.9 v high 241%
Katanning Comparison 21.5 +0.8 32.4 16th 9.3 +1.7 2.0 20th 72.6 35.5 v high 205%
Lake Grace 22.5 -0.5 33.1 16th 10.4 +1.7 4.3 20th 81.8 26.7 v high 306%
Lake Grace Comparison 22.7 -0.1 32.8 16th 10.2 +1.6 4.3 20th 78.2 23.1 highest 339%
Narembeen 24.9 0.0 34.4 16th 10.9 +2.0 4.8 14th 44.3 19.2 high 231%
Narrogin 21.9 +0.9 34.5 16th 9.8 +2.5 4.0 20th 50.8 31.4 high 162%
Newdegate Research Station 22.8 -0.2 32.6 16th 8.5 +1.7 0.3 20th 71.4 23.8 v high 300%
Ongerup 21.8 +0.8 32.4 16th 9.8 +1.7 3.2 20th 56.4 33.6 high 168%
Pingelly 22.6 +0.4 34.3 16th 10.4 +2.1 5.0 14th 50.6 25.1 v high 202%
Ravensthorpe 22.6 +0.3 31.8 16th 10.5 +1.6 2.2 20th 68.5 38.0 high 180%
Wagin 22.2 +0.5 33.0 16th 9.4 +1.7 2.4 20th 44.1 29.4 high 150%
Wandering 21.7 -0.3 32.1 16th 8.7 +2.8 1.5 20th 45.0 29.4 high 153%
Eucla (district 11)
Balladonia 23.5 -1.5 36.0 17th 10.7 +1.9 4.0 1st 113.1 23.1 v high 490%
Eucla 23.9 +0.8 37.2 18th 12.9 +1.6 6.0 29th 42.4 18.5 v high 229%
Eyre 23.6 +0.7 36.8 17th 10.3 +0.2 1.0 6th 62.6 19.8 v high 316%
Forrest 27.0 +0.2 37.7 18th 11.8 +1.5 3.1 1st        
Red Rocks Point 22.4   34.8 18th 13.7   7.4 6th  
South East (district 12)
Bulga Downs 27.9   37.0 17th 14.1   8.6 2nd 61.8 8.6 v high 719%
Kalgoorlie-Boulder Airport 24.9 -0.9 37.1 17th 12.9 +1.9 8.4 2nd 72.6 15.5 v high 468%
Laverton Aero 27.1 -0.9 36.2 17th 14.0 0.0 9.9 5th        
Leinster Aero 27.9 -1.6 38.0 17th 15.1 +0.4 10.6 2nd 30.8 13.5 high 228%
Leonora 28.3 -0.5 38.8 17th 14.9 +1.3 9.9 2nd 73.0 9.7 highest 753%
Leonora Aero 27.7   38.1 17th 14.9   10.3 5th 62.4
Munglinup West 22.7   32.7 17th 10.0   4.2 20th        
Norseman Aero 24.4 -1.0 37.4 17th 11.0 +1.9 0.8 20th 37.2 19.1 high 195%
Salmon Gums Res.Stn. 23.2 -0.1 35.6 17th 9.9 +2.4 -0.1 20th 103.6 27.5 highest 377%
Southern Cross Airfield 25.2 -1.1 34.6 17th 11.7 +2.9 5.2 14th        
Yeelirrie 28.8 -1.1 38.1 17th 14.1 +1.6 8.5 5th 15.8 9.5 high 166%
North East (district 13)
Balgo Hills                 21.1 11.6 high 182%
Carnegie 32.8 +0.1 37.7 8th 16.8 +0.5 11.7 2nd 54.4 5.6 highest 971%
Giles Meteorological Office 31.6 0.0 37.2 9th 17.5 +0.4 12.7 5th 74.8 15.7 v high 476%
Telfer Aero 36.6 -0.4 39.7 13th 20.6 -0.2 15.4 7th 28.6 2.9 v high 986%
Warburton Airfield 31.7 +0.1 37.4 19th 16.9 +1.5 11.0 5th 73.4 15.1 v high 486%
Wiluna 30.4 +0.2 38.3 17th 16.1 +2.3 10.6 5th 9.9 7.1 high 139%

Notes

This statement was prepared before all data for the period were available. This may affect some of the statistics presented.

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 3 pm on Monday 31 October 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, 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
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