Western Australia in October 2013: Second warmest October on record; Australian maximum temperature and a State minimum temperature records broken

  • Rainfall: near average rainfall for WA, below average for southwest WA
  • Maximum temperature: second warmest for WA; Fitzroy Crossing breaks national October record
  • Minimum temperature: ninth warmest for WA; Eyre breaks WA October record

Rainfall

Rainfall in October 2013 was below to very much below average over central and eastern parts of the State, as well as in much of the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay). Conversely, much of the Pilbara and the north and west Kimberley received above to very much above average rainfall, with some sites breaking their October rainfall records. The fact that rainfall was above average in these regions is more a reflection on October being a typically dry month in the north, as rainfall totals for the month were generally low.

Averaged across WA as a whole, rainfall in October 2013 was near average. Similarly the Southwest Land Division (SWLD) in general saw a near average October, however averaged across the Lower Southwest, October 2013 was below average.

Weak cold fronts produced mainly light rainfall with isolated moderate falls in the Lower Southwest on the 5th and 6th, whilst a cold front moved across the southern half of the state on the 8th producing widespread light to moderate rainfall in western parts of the State. A trough and cloudband developed off the west coast and passed over western and southern parts of WA on the 9th resulting in rainfall over much of the SWLD, southern Goldfields, and western Eucla, with moderate falls near the Central West and Lower West coasts, and in the Southeast Coastal. Jurien Bay recorded 25.6 mm on the 9th, its highest October daily rainfall in 44 years of record. A weak cold front brought light rainfall to coastal parts of the SWLD on the 11th. Outside of the SWLD, isolated showers and thunderstorms were confined to the Kimberley up to the 13th, but from the 14th to 17th extended to the Pilbara and Northern Interior, and from the 18th were often reported through parts of northern, central, and eastern WA. Thunderstorms in the late morning and early afternoon on the 16th in the east Pilbara brought heavy rain to Yarrie, with the daily total of 26.0 mm to 9am on the 17th the highest October daily fall in 111 years of record at the site. An extensive cloudband with fronts and troughs moved across western and southern WA from the 18th to 20th bringing widespread rainfall to the southern Gascoyne, SWLD, southern Goldfields, and Eucla regions, with moderate falls in the western and southern SWLD. Warra Jarra in the South Coastal reported 36.4 mm on the 20th, its highest October daily fall in 35 years of record. A cloudband with embedded thunderstorms brought unseasonal rainfall to the Pilbara on the 26th and 27th. Although totals were generally less than 25 mm, both Dampier Salt and Karratha Aerodrome recorded their highest October daily rainfall in 44 and 39 years of record respectively. Further highlighting the climatologically dry nature of October in the Pilbara, a few sites recorded their wettest October on record as a result of very modest one day rainfall events. For instance, a rainfall event at Karratha Aerodrome of 6.0 mm on the 27th was enough to see Karratha Aerodrome register its wettest October, just exceeding the previous record of 5.9 mm in October 1975.

Maximum temperature

Very much above average mean maximum temperatures were observed over WA, with an area of highest on record in the west Kimberley. Fitzroy Crossing Aerodrome recorded a mean maximum of 42.0 ºC, the hottest October for the site in 16 years of record. More notably, however, this is the highest mean maximum temperature for October recorded in Australia, exceeding the previous record of 41.9 ºC at Fitzroy Crossing Aerodrome in 2002. Broome Airport also recorded its highest October mean maximum temperature in 74 years of record. Areas up to 4 °C warmer than normal were observed in the west Kimberley, as well as in central WA. Much of the Southwest Land Division was between 1 ºC and 2 ºC above average for mean maximum temperature in October 2013.

Averaged across the state as a whole, the mean maximum temperature for WA in October 2013 was very much above average and ranked as the second warmest October since comparable records commenced in 1910. This continues WA's run of above average mean monthly maxima since April 2012, with only June 2013 being below the average, and as a result WA has recorded its warmest January to October period on record in 2013. For the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), the mean maximum temperature for October was above average, and for the January October period is the fifth warmest on record.

In the north, hot to very hot days were dominant with maxima in the high thirties to low forties common in the Kimberley, east Pilbara, and Northern Interior. The record breaking month at Fitzroy Crossing Aerodrome saw 29 consecutive days with a maximum temperature of 40 °C or higher (1st to 29th), which equalled the longest hot spell (consecutive days of 40 °C or higher) at the site for any month in its 16 years of record, equal with 29 days of 40 ºC or greater between 9 November and 7 December 2007, and is the longest such hot spell in October for any recording site in Australia. The highest temperature of the month in WA was 44.8 ºC at Fitzroy Crossing Aerodrome on the 18th. Both Argyle Aerodrome (19 years of record) and Curtin Aerodrome (23 years of record) in the Kimberley registered their greatest number of days at or above 40 ºC in October 2013, with 19 and 21 days respectively.

For the SWLD, warm to hot days were experienced on the 3rd, and from the 23rd to 31st, whilst mild days were observed on the 1st, 9th, 12th, and from the 19th to 21st. A number of sites in the SWLD recorded their mildest day for the month on the 19th with a cloudband, rainfall, and southerly winds dominating the weather. Rocky Gully in the South Coastal recorded the lowest maximum temperature in the State for the month with 11.2 ºC.

For the Goldfields, Southern Interior and Eucla, cool to mild days were reported on the 1st, 10th, 12th and 13th, and from the 20th to 23rd, whilst warm to hot days were reported from the 3rd to the 9th, 15th to 19th, and from the 25th onward. A maximum of 42.9 °C recorded on the 8th at Eucla was the equal hottest day in October in 52 years of record at the site, equal with 42.9 °C on 24 October 2008.

Minimum temperatures

Most of the State saw above to very much above average mean minimum temperatures in October 2013, with areas up to 3 °C warmer than normal in the Pilbara and Southern Interior.

Averaged across the state as a whole, the mean minimum temperature for WA in October 2013 was ninth warmest on record, whilst averaged across the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), the mean minimum temperature was also above average. Persistent mean minium temperatures for WA since September 2012 have led to the State recording its fourth warmest January to October period, whilst the Lower Southwest has recorded its third warmest January to October period, only behind 2011 and 1983.

In the north, nights were predominantly mild to warm, with cool nights at the start of the month in the Pilbara, and from the 5th to the 7th in the Kimberley. A very warm night was reported in the east Kimberley on the 9th and 10th as sites in the region recorded the highest minimum temperatures in the State for the month, the highest being 30.6°C on the 10th at Argyle Aerodrome. Particularly warm nights were also reported in the west Kimberley on the 27th and 28th, and Broome Airport recorded a daily minimum temperature of 28.6 °C on both these days, which is the highest minimum temperature recorded at Broome Airport in October in 75 years of record, exceeding the previous record of 27.9 °C on 28 October 1991.

For the Gascoyne, SWLD, Goldfields, Southern Interior, and Eucla, cool to cold nights were generally reported on the 1st and 2nd, 10th and 11th, between the 13th and 15th, on the 17th, and between the 21st and 23rd, whilst warm nights were reported on the 4th, 16th, 19th and 20th, and from the 24th to the end of the month. The lowest temperature in October 2013 in WA was recorded at Eyre in the Eucla on the 14th with -5.0 °C. This is the lowest temperature on record for WA in October, exceeding the previous record of -4.3 ºC at Eyre on 24 October 1995.

Further information

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Extremes in October 2013
Hottest day 44.8 °C at Fitzroy Crossing Aero on the 18th
Warmest days on average 42.0 °C at Fitzroy Crossing Aero
Coolest days on average 18.9 °C at Cape Leeuwin
Coldest day 11.2 °C at Rocky Gully on the 19th
Coldest night -5.0 °C at Eyre on the 14th
Coolest nights on average 5.9 °C at Newdegate Research Station
Warmest nights on average 27.2 °C at Troughton Island
26.4 °C at Wyndham
Warmest night 30.6 °C at Argyle Aerodrome on the 10th
Wettest overall 117.0 mm at Ellenbrae
Wettest day 53.0 mm at Truscott on the 15th
Highest wind gust 94 km/h at Kununurra Aero on the 13th

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 October daily rainfall
Highest daily rainfall
in October 2013 (mm)
Previous wettest
for October
Years of
record
Yarrie 26.0 on the 17th 23.4 on the 26th in 1916 111
Dampier Salt 16.0 on the 27th 5.6 on the 15th in 1975 44
Jurien Bay 25.6 on the 9th 25.2 on the 29th in 2008 44
Karratha Aero 6.0 on the 27th 3.0 on the 15th in 1975 39
Warra Jarra 36.4 on the 20th 27.8 on the 26th in 1980 35



Record highest total October rainfall
Total rainfall
for October 2013 (mm)
Previous wettest
for October
Years of
record
Average for
October
Yarrie 26.0 25.9 in 1916 113 2.3
Dampier Salt 16.0 11.7 in 1975 44 0.8
Karratha Aero 6.0 5.9 in 1975 39 0.5

Highest total October rainfall for at least 30 years
Total rainfall
for October 2013 (mm)
Most recent October
at least this wet
Years since
wetter
Average for
October
Roebourne 8.4 15.8 in 1957* 55 0.8
Broome Airport 8.8 28.0 in 1975 38 1.5
Lancelin 72.5 86.6 in 1977 36 29.8
Tammin 41.2 51.0 in 1977 36 19.2
Bidyadanga 11.4 14.0 in 1979 34 1.1
Indee 11.2 23.5 in 1975* 32 1.4

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.




Record highest October temperature
Highest temperature
in October 2013 (°C)
Previous warmest
for October
Years of
record
Average for
October
Northam 40.0 on the 30th 39.4 on the 26th in 1961 104 24.0
Mullewa 41.0 on the 30th 40.4 on the 27th in 1926 71 27.1
Carnamah 41.7 on the 30th 40.0 on the 24th in 1958 69 26.0
Corrigin 38.7 on the 30th 38.3 on the 30th in 1951 66 23.1
Eucla 42.9 on the 8th = 42.9 on the 24th in 2008 52 23.1
Merredin 39.3 on the 30th 38.4 on the 25th in 1979 48 24.8
Badgingarra Research Stn 38.8 on the 30th 38.5 on the 29th in 1979 47 24.4
Brookton 37.9 on the 30th 37.1 on the 23rd in 1990 46 23.2
Beverley 39.4 on the 30th 38.4 on the 23rd in 1990 45 24.3
Wongan Hills 39.5 on the 30th 39.4 on the 25th in 1979 45 25.1
Narembeen 38.3 on the 30th 37.0 on the 31st in 1981 44 25.0
Pingelly 37.0 on the 30th 36.5 on the 23rd in 1990 42 22.2
Eneabba 40.0 on the 30th = 40.0 on the 18th in 2009 40 26.4
Wagin 37.0 on the 30th 35.9 on the 23rd in 1990 40 21.8



Record highest October mean daily maximum temperature
Mean daily maximum
temperature
for October 2013 (°C)
Previous warmest
for October
Years of
record
Average for
October
Broome Airport 35.4 = 35.4 in 1961 74 32.9



Record highest October daily minimum temperature
Highest daily minimum
temperature
in October 2013 (°C)
Previous warmest
for October
Years of
record
Average for
October
Broome Airport 28.6 on the 27th & 28th 27.9 on the 28th in 1991 75 22.4
Emu Creek Station 25.5 on the 31st 24.8 on the 25th in 2012 42 16.9



Summary statistics for October 2013
Maximum temperatures
for October
(°C)
Minimum temperatures
for October
(°C)
Rainfall
for October
(millimetres)
Mean for
October
2013
Diff
from
average
Highest for
October
2013
Mean for
October
2013
Diff
from
average
Lowest for
October
2013
Total for
October
2013
Average
for
October
Rank of
October
2013
Fraction of
October
average
North Kimberley (district 01)
Doongan 36.8 -0.1 40.0 10th         90.0 36.1 high 249%
Kalumburu 37.1 +0.3 40.0 10th 23.2 +0.7 20.1 1st 59.4 40.1 high 148%
Mount Elizabeth 37.0 +1.1 39.4 10th 21.0 +1.9 15.0 8th 30.2 32.5 average 93%
Troughton Island 32.6 +0.9 34.1 24th 27.2 +0.9 24.7 15th 1.2 2.7 high 44%
Truscott 34.4   37.0 24th 25.0   21.7 1st 64.8 26.0 high 249%
Wyndham 39.3 +0.5 42.2 10th 26.4 +0.7 22.7 6th 19.8 22.7 high 87%
Wyndham Aero 40.4 +1.2 42.8 26th 25.6 +0.8 21.6 6th 10.8 19.4 average 56%
East Kimberley (district 02)
Argyle Aerodrome 39.7 +1.5 42.6 9th 26.3 +1.3 21.2 7th 21.0 34.8 average 60%
Halls Creek Airport 38.2 +1.1 41.9 10th 24.4 +1.8 17.7 7th 4.2 17.6 average 24%
Kununurra Aero 39.9 +1.4 42.8 9th 22.9 -0.6 15.3 6th 22.0 23.6 average 93%
Warmun 39.9 +1.3 42.5 18th 25.2 +2.2 17.0 6th 15.6 23.5 average 66%
West Kimberley (district 03)
Bidyadanga 37.2 +3.0 42.9 13th 22.4 +1.4 17.0 4th 11.4 1.1 v high 1036%
Broome Airport 35.4 +2.5 41.0 14th 24.3 +1.9 21.0 3rd 8.8 1.5 v high 587%
Curtin Aero 40.5 +1.7 43.1 11th 23.3 +1.7 18.8 7th 3.2 5.3 average 60%
Derby Aero 39.0 +2.0 43.7 11th 23.9 +0.9 19.4 3rd 0 2.6 lowest 0%
Fitzroy Crossing Aero 42.0 +2.2 44.8 18th 25.0 +2.2 21.9 7th 0.4 17.4 average 2%
Lombadina Airstrip 34.9   40.4 2nd 24.0   20.7 2nd 0
West Roebuck 37.5 +1.8 41.8 13th 22.7 +2.0 19.5 1st 2.8 3.1 high 90%
De Grey (district 04)
Bedout Island 31.6   34.3 27th 24.9   21.9 1st
Karratha Aero 35.5 +1.7 40.7 16th 21.0 +0.4 15.4 2nd 6.0 0.5 highest 1200%
Legendre Island 31.5   36.3 19th 23.2   19.6 2nd
Mandora 38.7 +2.8 42.8 14th 21.2 +2.2 14.7 2nd 1.4 1.1 high 127%
Marble Bar 39.6 +1.3 42.5 19th 22.1 +0.7 14.3 1st 4.2 3.9 high 108%
Pardoo Station 37.2 +1.6 41.0 4th 20.7 +1.2 14.7 1st 1.4 0.8 v high 175%
Port Hedland Airport 37.1 +2.3 40.7 15th 20.3 +1.9 13.4 2nd 1.6 0.9 high 178%
Roebourne 38.3 +2.7 42.1 19th 20.7 +1.0 14.4 1st 8.4 0.8 v high 1050%
Roebourne Aero 38.4 +1.4 42.0 19th 19.6 0.0 12.3 2nd 9.2 1.7 high 541%
Fortescue (district 05)
Barrow Island Airport 30.4 +1.1 34.5 13th 22.5 +0.9 17.0 2nd 1.4 2.4 high 58%
Christmas Creek 36.8   40.1 19th 20.6   13.9 1st 6.6
Fortescue Dave Forrest 36.2   39.6 18th 20.2   15.2 3rd 14.0
Learmonth Airport 34.4 +1.8 39.5 16th 17.6 +1.3 13.2 2nd 0 1.7 lowest 0%
Mardie 35.9 +1.0 41.4 16th 18.9 +1.5 13.7 1st 1.8 0.9 v high 200%
Onslow Airport 34.6 +1.8 40.6 18th 19.9 +2.2 16.8 1st 1.4 0.9 high 156%
Wittenoom 37.3 +2.0 41.5 18th 22.3 +1.6 15.8 2nd 3.8 3.9 high 97%
West Gascoyne (district 06)
Carnarvon Airport 27.9 +1.9 37.9 2nd 17.1 +0.7 13.0 3rd 2.8 5.3 average 53%
Denham 27.2 +1.7 34.0 2nd 17.6 +1.1 13.5 22nd 4.2 6.1 average 69%
Emu Creek Station 36.7 +2.4 40.8 17th 17.6 +0.7 15.2 26th 12.6 2.2 v high 573%
Murchison 33.9 +3.4 41.0 31st         2.4 5.0 average 48%
Shark Bay Airport 29.7 +1.5 37.8 29th 15.2 0.0 10.9 3rd 5.6 5.0 average 112%
East Gascoyne (district 07)
Newman Aero 35.9 +1.0 39.4 18th 18.3 +0.7 13.8 1st 3.4 5.6 average 61%
Paraburdoo Aero 37.1 +1.4 40.5 31st 19.1 +0.9 14.6 2nd 1.4 4.3 average 33%
Murchison (district 07A)
Meekatharra Airport 32.9 +3.3 39.3 31st 16.5 +1.4 10.3 1st 0 6.2 lowest 0%
Mount Magnet Aero 31.3 +2.1 40.6 31st 14.8 +0.5 8.1 1st 1.2 6.6 low 18%
Paynes Find 29.5 +1.9 39.7 31st 12.0 +0.7 6.0 1st 19.4 10.9 high 178%
North Coast (district 08)
Carnamah 28.4 +2.4 41.7 30th 11.5 +1.2 6.5 14th 15.2 16.7 average 91%
Dalwallinu 27.6 +1.5 40.1 30th 9.7 +0.1 2.8 7th 18.0 14.3 high 126%
Geraldton Airport 26.0   35.5 23rd 11.3   6.1 1st 13.4
Kalbarri 27.6 +1.4 35.1 23rd 12.4 -0.2 7.4 7th 14.9 14.8 average 101%
Morawa Airport 29.7 +1.7 41.2 30th 11.9 +1.0 5.5 1st 13.6 9.2 high 148%
Mullewa 29.9 +2.8 41.0 30th 13.1 +2.0 8.1 1st 15.8 13.1 high 121%
Wongan Hills 26.9 +1.8 39.5 30th 10.2 +0.2 4.5 1st 21.4 19.9 average 108%
Central Coast (district 09)
Badgingarra Research Stn 25.5 +1.1 38.8 30th 9.7 +0.3 4.4 1st 25.0 29.1 average 86%
Bickley 21.7 +0.6 35.1 30th 10.0 +0.5 4.5 21st 51.8 66.2 average 78%
Champion Lakes 23.1   36.2 30th 12.6   6.2 1st 34.6
Garden Island HSF 21.2 +0.3 32.6 30th 14.0 +0.6 8.7 1st 29.0 30.4 average 95%
Gingin Aero 24.9 +0.7 38.6 30th 9.8 +0.7 3.3 1st 25.2 36.5 average 69%
Gosnells City 25.1 +1.2 38.2 30th         32.1 46.0 low 70%
Jandakot Aero 23.4 +0.7 36.7 30th 10.6 +1.1 3.1 1st 40.4 46.4 average 87%
Jurien Bay 24.5 +1.2 31.4 23rd 12.2 +1.0 6.5 1st 43.3 27.1 high 160%
Karnet 21.4 +0.6 34.0 30th 9.3 +0.3 2.4 1st 44.6 76.7 low 58%
Lancelin 24.0 +1.5 31.0 28th 12.2 +0.3 7.0 13th 72.5 29.8 v high 243%
Medina Research Centre 23.4 +0.8 37.1 30th 11.0 +0.7 5.0 1st 34.6 40.1 average 86%
Pearce RAAF 24.8 +1.5 37.7 30th 11.3 +1.2 4.7 1st 29.8 36.4 average 82%
Perth Airport 24.1 +1.5 37.1 30th 11.3 +1.1 4.0 1st 30.4 44.1 average 69%
Perth Metro 23.9 +0.7 37.2 30th 12.1 +0.7 5.5 1st 38.0 39.6 average 96%
Rottnest Island 21.4 +1.0 32.9 30th 14.7 +0.9 10.3 21st 31.8 30.2 average 105%
Swanbourne 23.3 +1.1 33.9 30th 13.0 +0.8 7.4 1st 42.2 42.2 average 100%
South Coast (district 09A)
Albany 19.0 +0.6 25.1 7th 11.7 +1.3 7.4 13th 54.6 78.7 low 69%
Albany Airport 20.0   24.9 7th 9.4   2.8 14th 64.6
Bridgetown 20.9 +0.6 32.8 30th 8.3 +1.5 0.4 13th 26.0 42.7 low 61%
Bunbury 21.0 +0.1 30.7 30th 10.7 +1.4 3.6 21st 38.4 31.3 average 123%
Busselton Aero 21.9 +0.7 31.8 30th 9.7 +1.3 2.6 13th 37.8 31.5 high 120%
Cape Leeuwin 18.9 +0.7 23.0 30th 13.5 +0.9 9.9 22nd 51.4 65.0 average 79%
Cape Naturaliste 20.5 +1.7 29.9 30th 11.8 +0.8 6.4 21st 21.2 49.9 low 42%
Collie East 21.7 +0.2 33.6 30th 7.6 +0.3 1.2 13th 30.0 40.3 low 74%
Donnybrook 22.7 +1.6 35.0 30th 10.3 +2.0 3.6 21st 40.1 63.4 low 63%
Dwellingup 21.4 +1.4 34.2 30th 9.0 +1.0 2.5 1st 47.6 79.6 low 60%
Esperance 22.0 +0.9 32.8 31st 11.1 +0.3 6.2 1st 73.2 46.6 high 157%
Esperance Aero 22.7 +1.5 32.9 31st 9.6 -0.1 4.0 1st 79.0 46.8 v high 169%
Harvey 22.1 +0.8 34.5 30th         40.7 47.6 average 86%
Hopetoun North 22.6 +1.1 34.0 3rd 10.7 +0.6 4.6 14th 51.2 38.5 average 133%
Jarrahwood 21.8 +1.2 33.5 30th 8.1 +0.7 -0.2 13th 49.4 57.4 average 86%
Mandurah 22.0 +0.3 32.0 30th 13.9 +0.6 8.7 1st 33.8 32.3 average 105%
Manjimup 20.8 +2.0 32.6 30th 9.2 +0.9 3.5 13th 33.8 75.8 low 45%
North Walpole 19.2   29.7 30th 10.7   4.9 13th 59.0 75.4 average 78%
Pemberton 20.1 +1.3 32.1 30th 9.7 +1.1 3.2 13th 53.3 89.5 low 60%
Rocky Gully 20.4 +1.4 32.1 30th 8.6 +0.7 2.3 13th 47.8 53.8 average 89%
Windy Harbour 19.2 +0.4 25.6 30th 10.9 +0.6 4.7 13th 84.0 69.4 average 121%
Witchcliffe 20.6 +1.2 32.4 30th 9.7 +0.6 3.0 13th 51.4 62.8 average 82%
North Central (district 10)
Bencubbin 26.8 +1.7 38.2 30th 10.7 +1.0 4.3 1st 23.4 15.6 high 150%
Cunderdin Airfield 26.6 +0.8 40.1 30th 8.1 +0.1 1.4 1st 27.4 16.9 high 162%
Merredin 26.9 +2.1 39.3 30th 9.8 +0.2 2.6 1st 15.8 18.2 average 87%
Northam 25.7 +1.7 40.0 30th 9.1 +0.2 2.9 1st 24.7 24.6 average 100%
York 25.8 +1.2 40.0 30th 6.8 -0.4 1.1 13th 19.6 22.7 average 86%
South Central (district 10A)
Beverley 26.0 +1.7 39.4 30th 8.4 +0.5 2.6 1st 21.0 23.6 average 89%
Brookton 24.4 +1.2 37.9 30th 7.6 +0.2 1.4 1st 22.5 25.5 average 88%
Corrigin 24.9 +1.8 38.7 30th 8.2 0.0 2.5 13th 26.0 21.1 high 123%
Hyden 25.8 +1.1 38.0 30th 8.3 +0.1 2.0 1st 23.3 21.6 average 108%
Jacup 22.4 +0.8 32.6 3rd 7.7 +0.1 1.1 13th 2.2 40.4 v low 5%
Katanning 21.6 -0.1 35.6 30th 7.7 +0.5 1.6 13th 30.2 30.4 average 99%
Lake Grace 24.0 +0.9 36.5 30th 8.5 -0.4 2.7 13th 27.6 25.4 high 109%
Narembeen 25.9 +0.9 38.3 30th 8.8 -0.2 3.4 1st 27.4 19.2 high 143%
Narrogin 22.8 +1.7 36.5 30th 7.9 +0.5 2.2 13th 29.2 31.2 average 94%
Newdegate Research Station 24.2 +1.1 35.9 30th 5.9 -1.0 -2.0 13th 21.8 23.4 average 93%
Ongerup 21.8 +0.7 35.0 30th 8.3 +0.1 2.4 13th 24.6 33.3 average 74%
Pingelly 23.7 +1.5 37.0 30th 8.3 -0.1 3.2 1st 30.5 25.0 high 122%
Ravensthorpe 22.9 +0.5 33.2 30th 9.1 +0.1 2.5 13th 47.2 37.8 high 125%
Wagin 23.1 +1.3 37.0 30th 8.3 +0.5 2.0 13th 20.2 29.1 average 69%
Wandering 22.7 +0.6 35.9 30th 6.4 +0.2 0.7 13th 24.2 27.4 average 88%
Eucla (district 11)
Balladonia 27.4 +2.4 40.0 8th 9.2 +0.4 0.5 1st 11.0 22.8 average 48%
Eucla 26.4 +3.3 42.9 8th 12.1 +0.8 5.4 11th 8.6 18.3 average 47%
Eyre 26.4 +3.4 42.4 8th 9.2 -0.9 -5.0 14th 18.0 19.7 average 91%
Forrest 29.2 +2.2 42.1 8th 10.8 +0.3 4.1 14th 1.0 9.9 low 10%
South East (district 12)
Bulga Downs 31.9 +1.9 40.0 31st 13.8 -0.2 6.1 10th 0.4 8.4 average 5%
Kalgoorlie-Boulder Airport 28.5 +2.7 38.5 31st 11.6 +0.5 3.8 1st 11.2 15.2 average 74%
Laverton Aero 31.3 +3.2 40.6 8th 15.0 +0.9 8.8 1st 0 13.1 v low 0%
Leinster Aero 31.8 +2.3 39.0 8th 15.1 +0.3 6.6 1st 0.2 12.2 low 2%
Leonora 31.8 +2.9 40.0 8th 14.6 +0.9 6.8 1st 1.2 9.6 low 13%
Leonora Aero 31.4   39.6 8th 14.6   6.8 1st 1.4
Munglinup West 23.6 +0.5 32.7 3rd 9.0 -0.3 3.3 1st 60.2 40.7 average 148%
Norseman Aero 27.0 +1.5 39.6 31st 8.7 -0.7 0.2 1st 33.2 18.8 high 177%
Salmon Gums Res.Stn. 25.5 +2.1 38.9 31st 7.5 -0.1 -0.8 13th 40.6 27.4 high 148%
Southern Cross Airfield 27.1 +0.8 40.3 31st 10.1 +1.0 1.9 1st 32.8 14.5 high 226%
Yeelirrie 33.4 +3.5 39.5 31st 13.1 +0.5 5.7 11th 0 9.4 lowest 0%
North East (district 13)
Balgo Hills 39.1 +2.1 41.9 9th 23.8 +1.5 18.6 6th 0 11.5 lowest 0%
Carnegie 34.5 +1.7 40.5 8th         0.4 5.5 average 7%
Giles Meteorological Office 33.8 +2.1 40.1 9th 18.1 +1.0 10.5 2nd 0 15.4 lowest 0%
Telfer Aero 38.5 +1.5 41.3 19th 22.5 +1.7 18.0 1st 0 2.8 lowest 0%
Warburton Airfield 34.3 +2.7 42.2 8th 16.9 +1.4 7.4 2nd 0.8 14.6 low 5%
Wiluna 33.3 +3.0 38.8 31st 14.6 +0.7 9.7 1st 0.1 7.0 average 1%
Offshore Islands (district 200)
Adele Island 30.3   32.8 28th 26.4   23.2 31st
Browse Island 30.2   32.3 26th 26.8   22.1 31st
Christmas Island Aero 27.8 +1.0 28.5 16th 23.4 +0.8 22.0 29th 55.6 65.4 average 85%
Cocos Island Airport 28.9 +0.2 29.8 19th 25.2 +1.0 22.0 13th 21.0 83.5 low 25%
Varanus Island 29.6 +0.4 32.3 14th 23.2 +0.7 20.7 1st 0.8 1.3 high 62%

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 Friday 1 November 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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