Western Australia in September 2014: warmest September on record

September 2014 in Western Australia was exceptionally warm and ranked as the warmest September in terms of mean maximum temperature since records commenced in 1910. Mean maximum temperatures were above to very much above average throughout the state, with much of WA 2 to 3 °C warmer than normal, increasing to up to 4 °C warmer than normal in central and southeastern parts. For the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), September 2014 was the third highest on record.

Mean minimum temperatures were above average to very much above average across much of WA, apart from in the Kimberley, with areas of highest on record in the west Gascoyne, northern Southwest Land Division (SWLD), Goldfields, and western Eucla. Mean minima were 3 °C to 4 °C warmer than normal in the southern Gascoyne, and neighbouring northern Central West, northern Goldfields and Southern Interior. In contrast, the Kimberley saw below to very much below average mean minimum temperatures, with mean minima 3 °C to 4 °C cooler than normal in the east. For WA as a whole the mean minimum temperature ranked as the sixth warmest September on record. When averaged across the Lower Southwest, September 2014 ranked third warmest on record.

Rainfall in September 2014 in WA was above to very much above average in parts of the Pilbara, Gascoyne, northern and eastern SWLD, southern Goldfields and Eucla. A number of locations in the west Gascoyne and Central West recorded one of their wettest September on recorded, largely due to two significant rainfall events in the latter part of the month. Areas in the southern SWLD, northern Goldfields, Southern Interior, much of the Kimberley and eastern parts of northern Interior saw below to very much below average rainfall. Rainfall in September 2014 was near average when averaged across the State; similarly, rainfall was also near average for the SWLD and the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay).

  • Two strong cold fronts produced widespread, mainly minor damage, over southern WA from the 7th to 9th. Given the path of damage, a tornado likely moved through Forrestfield (southeast of Perth). Severe wind gusts in excess of 90 km/h were observed in multiple coastal and inland sites while Cape Leeuwin recorded the highest wind gust of 119 km/h on the 8th. Tides at a number of coastal sites eequalled or exceeded the Highest Astronomical Tide and over 10,000 homes lost power.
  • Denham recorded 22 consecutive nights with minimum temperature at or above 15 °C from the 1st to 22nd
  • A deep trough off the west coast moved slowly into central WA on the 20th and 21st, resulting many locations in the SWLD, southern Gascoyne and southern Goldfields recording their hottest September day on record.
  • A strong cold front and associated cloudband moved through SWLD, southern Gascoyne and Goldfields on the 21st and 22nd, bringing significant rainfall to the SWLD. A number of locations in the Central West recorded their wettest September day on record.
  • A cold front and associated cloudband moved through SWLD on the 27th bringing moderate rainfall to southern parts

 

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Extremes in September 2014
Hottest day 41.2 °C at Curtin Aero on the 30th
Warmest days on average 38.1 °C at Fitzroy Crossing Aero
Coolest days on average 17.7 °C at Shannon
Coldest day 12.8 °C at Shannon on the 8th
Coldest night -1.5 °C at Eyre on the 2nd
Coolest nights on average 5.8 °C at Newdegate Research Station
Warmest nights on average 25.3 °C at Browse Island
21.7 °C at Argyle Aero
Warmest night 26.4 °C at Browse Island on the 20th
26.0 °C at Argyle Aero on the 11th
Warmest on average overall 29.3 °C at Argyle Aerodrome
Coolest on average overall 12.8 °C at Shannon
Wettest overall 213.2 mm at Huntly
Wettest day 61.6 mm at Moascar on the 22nd
Strongest wind gust 119 km/h at Cape Leeuwin on the 8th

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 September daily rainfall
New record
(mm)
Old
record
Years of
record
Northampton 52.8 on the 22nd 45.8 on the 21st in 1999 108
Dongara 50.4 on the 22nd 50.0 on the 22nd in 1958 107
Howatharra 61.0 on the 22nd 53.0 on the 21st in 1999 87
Lynton 42.5 on the 22nd 40.4 on the 21st in 1999 87
Eyre 41.0 on the 23rd 29.5 on the 26th in 1911 64
Kalbarri 36.7 on the 22nd 26.8 on the 19th in 1974 44



Record highest September total rainfall
New record
(mm)
Old
record
Years of
record
Average for
September
Howatharra 117.0 89.8 in 1912 84 31.9
Carnarvon Airport 33.2 28.4 in 1997 70 6.1
Coolangatta 63.0 61.6 in 1958 63 24.7
Kalbarri 75.9 51.0 in 1974 44 24.6

Highest September total rainfall for at least 20 years
Observed
(mm)
Most recent
higher
Years since
higher
Average for
September
Northampton 96.6 101.8 in 1917 97 40.8
Lynton 76.5 109.0 in 1917* 82 27.4
Sandsprings 90.2 107.6 in 1917* 81 39.8
Denham 22.6 29.2 in 1927* 79 8.0
Cuballing 81.2 88.4 in 1971* 39 45.5
Gingin 124.5 132.3 in 1973* 36 69.8
Dongara 75.1 76.8 in 1978* 32 35.8
Three Springs 66.0 78.6 in 1982 32 28.1
Carnamah 46.6 53.7 in 1992 22 28.4
Highfields 53.0 58.5 in 1992 22 25.8
Riverside 53.0 67.8 in 1992* 21 17.3
Geraldton Town 59.4 60.5 in 1978* 20 30.6

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



 

Record highest September temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Cape Leeuwin 29.7 on the 20th 27.8 on the 22nd in 1961 108 17.1
Donnybrook 31.6 on the 20th = 31.6 on the 10th in 1916 105 18.8
Perth Airport 34.5 on the 20th 31.6 on the 26th in 1961 71 20.1
Pearce RAAF 33.0 on the 20th 31.4 on the 29th in 2006 57 20.0
Pemberton 28.4 on the 20th 28.3 on the 22nd in 1961 56 16.7
Dwellingup 30.4 on the 20th 29.4 on the 22nd in 1961 55 17.2
Manjimup 28.5 on the 20th 28.2 on the 29th in 2006 55 16.5
Karnet 30.6 on the 20th 28.9 on the 30th in 1967 48 17.5
Esperance 34.9 on the 21st 34.4 on the 30th in 1983 46 19.4
Eneabba 35.4 on the 20th 34.7 on the 29th in 2010 41 22.9
Goomalling 34.3 on the 20th 33.1 on the 30th in 1967 39 20.5
Jarrahwood 30.0 on the 20th 28.0 on the 28th in 1986 33 18.1
Medina Research Centre 34.0 on the 20th 30.9 on the 18th in 1988 30 20.3
Eyre 38.5 on the 27th 37.1 on the 24th in 2007 27 21.2
Windy Harbour 29.4 on the 20th 26.3 on the 20th in 1994 26 17.6
Jandakot Aero 34.2 on the 20th 30.4 on the 20th in 1994 25 20.0
Rottnest Island 30.8 on the 20th 27.0 on the 28th in 1990 49 18.8
Esperance Aero 34.9 on the 21st 31.1 on the 29th in 2006 23 18.8
Gosnells City 34.8 on the 20th 31.3 on the 29th in 2006 22 20.7
Swanbourne 34.2 on the 20th 29.8 on the 29th in 2010 22 19.8
Bickley 30.5 on the 20th 29.0 on the 29th in 2006 21 17.4
Perth Metro 34.2 on the 20th 32.7 on the 30th in 1918 115 20.2
Mount Magnet Aero 35.6 on the 20th = 35.6 on the 29th in 2006 20 24.4



Record highest September mean daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Cape Leeuwin 18.6 = 18.6 in 1983 117 17.1
Wiluna 30.1 30.0 in 1981 111 26.3
Albany 19.4 = 19.4 in 1918 97 17.3
Corrigin 22.2 21.6 in 1951 66 19.1
Meekatharra Airport 29.4 28.9 in 1981 64 25.6
Wittenoom 34.2 = 34.2 in 1980 61 31.2
Eyre 24.3 24.2 in 2013 54 21.2
Pearce RAAF 22.0 = 22.0 in 1987 53 20.0
Merredin 23.9 22.8 in 2000 48 20.4
Wongan Hills 23.3 23.1 in 1987 47 20.6
Esperance 21.5 21.2 in 1983 45 19.4
Beverley 22.5 = 22.5 in 2010 44 20.3
Narembeen 23.3 22.6 in 1985 43 20.4
Pingelly 20.3 20.2 in 2010 42 18.3
Hyden 23.2 22.6 in 1980 41 20.3
Yeelirrie 29.5 28.7 in 1981 40 25.8
Wagin 20.1 19.6 in 2010 39 18.1
Paynes Find 26.4 26.1 in 1980 35 23.7
Jarrahwood 19.8 19.7 in 2010 32 18.1
Denham 25.8 25.1 in 2010 25 23.8
Windy Harbour 19.2 18.5 in 1994 25 17.6
Carnegie 31.8 30.9 in 2000 24 28.6
Esperance Aero 21.6 20.3 in 2013 22 18.8
Laverton Aero 27.7 26.3 in 1999 22 24.4
Gosnells City 22.9 22.4 in 2010 21 20.7
Jacup 21.0 20.4 in 2000 21 18.7
Karratha Aero 32.5 = 32.5 in 2000 21 30.6
Swanbourne 21.9 21.5 in 2010 21 19.8
Leinster Aero 28.4 27.3 in 1994 20 25.4
Pardoo Station 35.5 34.8 in 2008 20 32.9

Highest September mean daily maximum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Years since
higher
Average for
September
Pemberton 18.9 19.1 in 1946* 65 16.7
Mullewa 26.2 26.4 in 1936* 64 23.4
Donnybrook 20.7 20.9 in 1954* 57 18.8
Narrogin 19.8 21.1 in 1957* 53 17.7
Salmon Gums Res.Stn. 22.9 23.4 in 1961* 47 20.4
Port Hedland Airport 35.0 35.6 in 1980 34 32.3
Telfer Aero 35.3 35.8 in 1980 34 32.8
Ravensthorpe 21.7 22.1 in 1981 33 19.5
Roebourne 35.7 36.4 in 1980* 33 32.6
Carnarvon Airport 27.1 27.3 in 1987 27 24.4
Brookton 20.9 22.0 in 1987* 26 19.1
Ongerup 20.1 20.4 in 1987* 26 17.8
Manjimup 18.8 18.9 in 1987* 24 16.5
Rottnest Island 20.1 20.2 in 1990* 23 18.8
Murchison 28.7 28.8 in 1994 20 26.1
Northam 22.4 22.9 in 1994 20 20.4

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




Record highest September daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Carnarvon Airport 20.8 on the 17th = 20.8 on the 29th in 2010 69 13.8
Manjimup 15.0 on the 21st = 15.0 on the 24th in 1963 55 7.2
Karnet 16.2 on the 21st 15.5 on the 30th in 2010 48 7.3



Record lowest September temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Wyndham 13.5 on the 1st = 13.5 on the 13th in 2011 46 22.8



Record highest September mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Kalgoorlie-Boulder Airport 10.4 = 10.4 in 2006 73 8.0
Mullewa 12.2 11.0 in 2006 70 8.5
Carnarvon Airport 15.8 = 15.8 in 1983 68 13.8
Corrigin 7.8 7.7 in 2013 66 5.8
Bencubbin 9.8 9.5 in 1995 63 7.2
Merredin 9.6 8.6 in 1981 48 6.7
Onslow Airport 17.2 17.1 in 2006 48 15.3
Wongan Hills 9.6 9.4 in 1981 47 7.6
Brookton 7.7 7.0 in 1996 46 5.3
Lancelin 12.4 = 12.4 in 1988 46 10.5
Esperance 10.8 10.4 in 2013 45 9.5
Narembeen 8.6 8.3 in 2013 43 6.2
Pingelly 8.5 7.8 in 2013 42 6.5
Kalbarri 13.4 = 13.4 in 1983 40 10.8
Paynes Find 11.5 9.9 in 2006 35 8.0
Denham 16.5 16.4 in 2006 25 14.8
Carnegie 14.0 13.8 in 1995 24 11.5
Murchison 12.9 11.7 in 2013 24 9.4
Rottnest Island 14.1 13.9 in 2013 116 12.9
Gosnells City 11.6 11.5 in 2013 21 10.1
Bickley 9.6 = 9.6 in 2013 20 8.2
Leinster Aero 13.5 12.8 in 2006 20 10.6

Highest September mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
higher
Years since
higher
Average for
September
Warburton Airfield 14.8 15.3 in 1944* 36 11.3
Karnet 8.8 8.9 in 1977* 35 7.3
Meekatharra Airport 14.0 14.4 in 1981 33 11.5
Wiluna 13.3 13.8 in 1981 33 9.9
Narrogin 7.9 8.2 in 1983* 28 6.0
Salmon Gums Res.Stn. 7.2 7.5 in 1985* 23 5.8

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




Record lowest September mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Kununurra Aero 16.1 16.4 in 2011 28 20.1

Lowest September mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Years since
lower
Average for
September
Warmun 16.3 =16.3 in 1978 36 19.4



Record highest September mean temperature
New record
(°C)
Old
record
Years of
record
Average for
September
Cape Leeuwin 15.8 = 15.8 in 1898 117 14.4
Cape Naturaliste 15.2 = 15.2 in 2006 110 13.9
Narrogin 13.8 = 13.8 in 1936 95 11.8
Dwellingup 13.9 13.4 in 1961 76 11.9
Manjimup 13.5 13.2 in 1987 74 11.9
Mullewa 19.2 18.4 in 1936 70 16.0
Pemberton 13.8 13.6 in 2011 70 12.2
Perth Airport 16.3 15.8 in 1994 70 14.5
Carnarvon Airport 21.5 21.0 in 1983 68 19.1
Corrigin 15.0 14.5 in 1951 66 12.4
Meekatharra Airport 21.7 = 21.7 in 1981 64 18.5
Bencubbin 16.7 16.6 in 1987 63 14.1
Eyre 16.4 = 16.4 in 2001 54 14.4
Pearce RAAF 16.1 15.8 in 1994 53 14.4
Ravensthorpe 15.1 15.0 in 2000 52 13.4
Merredin 16.7 15.3 in 1994 48 13.6
Karnet 14.0 13.6 in 2000 47 12.4
Wongan Hills 16.4 15.7 in 1994 47 14.1
Brookton 14.2 13.7 in 1987 46 12.2
Lancelin 17.4 16.7 in 1988 46 15.5
Esperance 16.1 15.8 in 1983 45 14.4
Beverley 15.2 14.5 in 1983 44 13.0
Narembeen 16.2 15.0 in 1981 43 13.3
Pingelly 14.4 13.6 in 2000 42 12.4
Hyden 15.0 14.4 in 1981 41 13.1
Kalbarri 19.5 19.4 in 1983 40 17.3
Wagin 14.0 13.6 in 2000 39 12.2
Warburton Airfield 23.0 22.6 in 2013 39 19.6
Paynes Find 18.9 17.5 in 1994 35 15.9
Jarrahwood 13.5 13.3 in 2013 32 12.1
Medina Research Centre 16.4 16.0 in 2013 29 14.7
Denham 21.1 20.5 in 2012 25 19.3
Windy Harbour 14.5 14.1 in 2000 25 13.5
Carnegie 22.8 21.9 in 1995 24 20.1
Jandakot Aero 15.9 15.4 in 1990 24 14.1
Murchison 20.8 19.9 in 1994 24 17.7
Rottnest Island 17.1 16.9 in 1931 115 15.8
Esperance Aero 15.5 14.7 in 2013 22 13.6
Laverton Aero 20.5 19.9 in 1999 22 17.4
Gosnells City 17.2 16.7 in 1994 21 15.4
Jacup 14.2 13.5 in 2000 21 12.5
Karratha Aero 24.9 = 24.9 in 2000 21 23.8
Swanbourne 17.1 16.3 in 2013 21 15.4
Bickley 14.3 14.0 in 1994 20 12.8
Leinster Aero 21.0 19.9 in 2006 20 18.0

Highest September mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Years since
higher
Average for
September
Donnybrook 15.2 15.3 in 1914* 97 13.0
Albany 15.2 15.5 in 1918* 59 13.3
Northam 15.4 =15.4 in 1961* 50 13.6
Kalgoorlie-Boulder Airport 17.5 17.7 in 1981 33 15.1
Wittenoom 26.5 26.9 in 1980* 33 24.0
Yeelirrie 20.0 20.2 in 1981* 32 16.8
Ongerup 13.7 13.8 in 1987* 26 12.2
Salmon Gums Res.Stn. 15.0 15.2 in 1983* 25 13.1

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




Summary statistics for September 2014
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2014
Diff
from
average
Highest for
September
2014
Mean for
September
2014
Diff
from
average
Lowest for
September
2014
Total for
September
2014
Average
for
September
Rank of
September
2014
Fraction of
September
average
North Kimberley (district 01)
Doongan 35.5 +0.2 37.8 21st 15.7 -1.9 8.2 1st 0 5.8 lowest 0%
Kalumburu 35.4 -0.3 39.4 28th 16.9 -2.3 10.2 1st 0.6 1.6 average 38%
Mount Elizabeth 34.9 +0.7 36.9 21st 12.5 -2.4 4.3 1st 0 8.2 lowest 0%
Troughton Island 30.0 -0.3 31.5 20th 23.8 -0.7 21.2 1st 1.4 0.3 v high 467%
Truscott 32.9 -0.5 36.4 28th 20.2 -1.8 15.5 2nd 0.4 0.2 average 200%
Wyndham 37.2 +0.5 39.6 28th 20.1 -2.7 13.5 1st 0 3.9 lowest 0%
Wyndham Aero 38.0 +0.3 40.5 28th 19.0 -2.8 12.5 1st 0 3.8 lowest 0%
East Kimberley (district 02)
Argyle Aerodrome 36.9 +0.4 38.9 23rd 21.7 -0.6 15.0 1st 0 2.5 lowest 0%
Halls Creek Airport 35.5 +1.4 38.7 30th 18.3 -0.7 10.2 1st 0 4.5 lowest 0%
Kununurra Aero 37.2 +0.6 39.1 28th 16.1 -4.0 10.0 1st 0 2.9 lowest 0%
Warmun 37.1 +1.0 39.3 29th 16.3 -3.1 9.5 1st 0 4.5 lowest 0%
West Kimberley (district 03)
Bidyadanga 34.9 +2.1 39.5 30th 17.7 +0.2 11.0 1st 0 1.3 lowest 0%
Broome Airport 32.5 +0.7 38.8 26th 17.6 -0.9 11.7 1st 1.6 1.4 high 114%
Curtin Aero 37.6 +1.0 41.2 30th 17.2 -1.2 11.5 3rd 0 0.2 lowest 0%
Derby Aero 36.3 +1.0 40.6 29th 17.6 -1.9 12.6 2nd 0 1.1 lowest 0%
Fitzroy Crossing Aero 38.1 +0.8 41.1 30th 18.2 -0.5 10.7 1st 0 0.4 v low 0%
De Grey (district 04)
Karratha Aero 32.5 +1.9 37.8 15th 17.3 +0.4 12.3 1st 0 1.4 lowest 0%
Mandora 35.9 +2.2 40.4 14th 14.9 -0.8 7.7 1st 0 1.0 lowest 0%
Marble Bar 36.5 +1.9 39.6 21st 16.5 -0.2 10.1 1st 1.2 4.9 high 24%
Pardoo Station         15.3 -0.6 10.4 4th 0 2.8 lowest 0%
Port Hedland Airport 35.0 +2.7 39.0 14th 15.8 +0.4 11.2 3rd 0.8 1.2 high 67%
Roebourne 35.7 +3.1 39.8 15th 16.6 -0.2 12.0 2nd 0 1.3 lowest 0%
Roebourne Aero 35.6 +2.6 39.9 15th 15.3 -0.2 9.3 1st 0 2.7 v low 0%
Fortescue (district 05)
Barrow Island Airport 28.0 +1.2 31.4 20th 19.7 +0.3 16.2 3rd 1.0 0.8 high 125%
Learmonth Airport 30.3 +1.0 34.2 15th 14.5 +0.7 10.4 23rd 0.4 2.0 average 20%
Mardie 32.7 +0.5 37.0 15th 15.6 +1.3 12.2 1st 0 1.4 lowest 0%
Onslow Airport 31.1 +1.1 36.0 14th 17.2 +1.9 13.8 23rd 2.0 1.4 high 143%
Wittenoom 34.2 +3.0 37.0 15th 18.8 +2.0 12.8 2nd 0 3.1 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 27.1 +2.7 34.9 30th 15.8 +2.0 11.7 24th 33.2 6.1 highest 544%
Denham 25.8 +2.0 30.4 15th 16.5 +1.7 12.4 23rd 22.6 8.0 v high 283%
Emu Creek Station 32.5 +1.9 36.5 27th 14.6 +0.6 10.7 2nd 0.8 2.1 average 38%
Murchison 28.7 +2.6 35.1 26th 12.9 +3.5 7.6 23rd 14.4 7.9 v high 182%
Shark Bay Airport 27.5 +1.8 34.6 15th 15.0 +2.4 11.6 2nd 26.6 9.1 v high 292%
East Gascoyne (district 07)
Newman Aero 32.8 +2.4 36.1 21st 14.4 +2.3 8.8 24th 0 4.2 lowest 0%
Paraburdoo Aero 33.6 +2.3 37.8 15th 14.6 +1.1 10.3 2nd 0 3.3 lowest 0%
Murchison (district 07A)
Meekatharra Airport 29.4 +3.8 35.0 20th 14.0 +2.5 7.1 23rd 0.6 4.7 average 13%
Mount Magnet Aero 27.5 +3.1 35.6 20th 13.1 +2.9 6.9 23rd 19.0 9.5 high 200%
Paynes Find                 27.1 14.8 v high 183%
North Coast (district 08)
Dalwallinu 23.9 +3.1 34.7 20th 9.6 +2.8 5.3 23rd 43.4 27.8 v high 156%
Geraldton Airport 24.5   33.7 20th 11.4   7.4 24th 75.8
Kalbarri 25.6 +1.7 32.6 15th 13.4 +2.6 9.5 26th 75.9 24.6 highest 309%
Morawa Airport 25.8 +3.0 35.8 20th 10.9 +3.4 6.2 23rd 52.0 25.8 v high 202%
Mullewa 26.2 +2.8 34.6 20th 12.2 +3.7 7.9 23rd 44.8 21.9 v high 205%
North Island 23.4 +1.3 26.0 20th 17.3 +1.4 10.9 26th 40.0 23.1 high 173%
Wongan Hills 23.3 +2.7 34.6 20th 9.6 +2.0 5.0 23rd 41.4 29.8 high 139%
Central Coast (district 09)
Bickley 19.0 +1.6 30.5 20th 9.6 +1.4 5.4 1st 141.0 127.7 average 110%
Garden Island HSF 20.2 +1.4 32.9 20th 13.4 +1.4 9.6 1st 71.4 68.3 average 105%
Gingin Aero 22.2 +1.7 34.8 20th 9.2 +1.7 2.2 14th 66.6 87.5 low 76%
Gosnells City 22.9 +2.2 34.8 20th 11.6 +1.5 6.0 1st 82.6 83.3 average 99%
Jandakot Aero 21.8 +1.8 34.2 20th 10.0 +1.8 3.1 14th 72.0 88.0 average 82%
Karnet 19.2 +1.7 30.6 20th 8.8 +1.5 3.8 23rd 155.3 135.7 average 114%
Lancelin 22.5 +2.0 27.5 25th 12.4 +1.9 9.0 24th 70.0 56.7 high 123%
Pearce RAAF 22.0 +2.0 33.0 20th 10.2 +1.4 3.5 14th 65.4 70.3 average 93%
Perth Airport 22.1 +2.0 34.5 20th 10.6 +1.7 4.2 14th 69.8 73.6 average 95%
Perth Metro 22.0 +1.8 34.2 20th 11.4 +1.9 5.8 14th 77.0 81.3 average 95%
Rottnest Island 20.1 +1.3 30.8 20th 14.1 +1.2 9.6 22nd 53.6 59.7 average 90%
Swanbourne 21.9 +2.1 34.2 20th 12.3 +1.3 7.6 1st 74.8 84.5 low 89%
South Coast (district 09A)
Albany 19.4 +2.1 30.2 20th 11.0 +1.7 5.7 1st 67.7 102.0 low 66%
Albany Airport 19.7   29.1 20th 8.7   2.2 4th 54.4
Bridgetown 19.0 +1.5 28.0 20th 7.2 +1.2 1.2 4th 70.6 94.6 average 75%
Bunbury 20.7 +2.3 30.4 20th 9.8 +1.2 3.5 1st 91.2 86.6 average 105%
Busselton Aero 19.6 +1.3 28.1 20th 9.0 +1.2 2.8 1st 67.4 80.8 average 83%
Cape Leeuwin 18.6 +1.5 29.7 20th 13.0 +1.2 8.6 1st 69.6 91.3 low 76%
Cape Naturaliste 19.0 +1.7 24.5 20th 11.3 +0.9 6.7 1st 77.6 76.8 average 101%
Collie East 19.9 +1.8 30.2 20th 7.8 +2.2 0.3 1st 92.2 100.3 average 92%
Donnybrook 20.7 +1.9 31.6 20th 9.7 +2.6 4.1 1st 92.1 103.5 average 89%
Dwellingup 19.3 +2.1 30.4 20th 8.5 +2.0 2.6 1st 153.2 132.6 average 116%
Esperance 21.5 +2.1 34.9 21st 10.8 +1.3 6.6 5th 34.6 61.2 low 57%
Esperance Aero 21.6 +2.8 34.9 21st 9.3 +0.9 4.5 15th 46.6 57.7 average 81%
Hopetoun North                 38.4 52.8 average 73%
Jarrahwood 19.8 +1.7 30.0 20th 7.3 +1.3 -1.0 1st 106.2 107.2 average 99%
Mandurah 20.8 +1.9 28.1 20th 13.0 +1.2 8.3 1st 51.6 71.1 average 73%
Manjimup 18.8 +2.3 28.5 20th 8.3 +1.1 2.4 1st 78.2 109.3 low 72%
North Walpole 18.8 +1.6 28.1 20th 9.9 +0.8 3.6 1st 114.6 110.9 average 103%
Pemberton 18.9 +2.2 28.4 20th 8.7 +1.1 2.6 1st 135.5 130.9 average 104%
Rocky Gully 18.4 +2.0 26.8 20th 8.1 +1.0 0.8 1st 84.8 99.8 low 85%
Shannon 17.7 +1.4 26.5 20th 7.9 +0.5 0.7 1st 123.0 116.8 average 105%
Windy Harbour 19.2 +1.6 29.4 20th 9.9 +0.5 3.9 1st 108.7 115.1 average 94%
Witchcliffe 18.4 +1.0 26.8 20th 9.4 +0.6 3.5 1st 83.0 114.6 low 72%
North Central (district 10)
Bencubbin 23.6 +2.7 33.5 20th 9.8 +2.6 4.0 23rd 29.9 22.1 high 135%
Cunderdin Airfield 23.1 +2.5 34.1 20th 7.1 +2.2 1.2 14th 26.6 28.7 average 93%
Merredin 23.9 +3.5 32.5 20th 9.6 +2.9 3.0 23rd 27.0 25.9 average 104%
Northam 22.4 +2.0 33.6 20th 8.4 +1.6 3.1 23rd 43.0 37.5 average 115%
York 22.1 +2.1 33.0 20th 6.9 +2.0 2.6 14th 22.5 40.2 low 56%
South Central (district 10A)
Beverley 22.5 +2.2 33.6 20th 7.9 +2.1 3.2 1st 41.8 36.5 average 115%
Brookton 20.9 +1.8 32.2 20th 7.7 +2.4 1.9 23rd 43.0 38.9 average 111%
Corrigin 22.2 +3.1 32.1 20th 7.8 +2.0 1.8 14th 27.4 29.9 average 92%
Hyden 23.2 +2.9 32.5 20th 7.0 +1.1 1.4 14th 32.9 28.2 average 117%
Jacup 21.0 +2.3 30.5 21st 7.4 +1.2 0.6 1st 45.0 45.4 average 99%
Katanning 18.9 +1.5 28.5 20th 7.2 +1.1 1.4 1st 58.4 56.9 average 103%
Lake Grace 21.0 +1.9 31.3 20th 8.0 +1.6 2.2 1st 34.6 29.6 average 117%
Narembeen 23.3 +2.9 32.9 20th 8.6 +2.4 3.0 14th 26.0 26.2 average 99%
Narrogin 19.8 +2.1 30.2 20th 7.9 +1.9 2.2 1st 57.4 47.0 high 122%
Newdegate Research Station 20.1 +1.4 28.6 20th 5.8 +0.9 0.5 1st 32.2 33.9 average 95%
Ongerup 20.1 +2.3 30.5 20th 7.4 +0.9 1.0 1st 32.8 38.6 average 85%
Pingelly 20.3 +2.0 31.0 20th 8.5 +2.0 3.6 23rd 52.6 41.2 high 128%
Ravensthorpe 21.7 +2.2 32.4 21st 8.4 +1.0 2.9 1st 54.2 42.2 high 128%
Wagin 20.1 +2.0 30.3 20th 7.9 +1.7 1.8 1st 38.6 41.4 average 93%
Wandering 19.8 +1.6 29.5 20th 6.3 +1.5 0.1 1st 86.0 63.5 high 135%
Eucla (district 11)
Balladonia 24.7 +2.4 35.0 21st 8.1 +1.3 2.4 5th 29.8 20.1 high 148%
Eucla 24.0 +2.6 37.5 27th 10.5 +1.3 4.3 17th 12.0 22.5 average 53%
Eyre 24.3 +3.1 38.5 27th 8.5 +0.8 -1.5 2nd 57.4 24.1 v high 238%
Forrest 26.0 +1.6 37.0 27th 9.1 +0.8 1.4 2nd 22.2 16.9 high 131%
Red Rocks Point 22.6 +1.2 37.6 27th 11.1 +1.1 5.9 10th 22.0 30.6 average 72%
South East (district 12)
Bulga Downs 28.3 +3.3 35.0 26th 11.6 +2.8 5.5 23rd 2.3 7.7 average 30%
Kalgoorlie-Boulder Airport 24.6 +2.3 35.0 21st 10.4 +2.4 4.8 23rd 18.4 14.4 high 128%
Laverton Aero 27.7 +3.3 36.1 21st 13.3 +2.9 6.2 23rd 3.0 8.3 average 36%
Leinster Aero 28.4 +3.0 35.1 21st 13.5 +2.9 6.9 23rd 0.2 4.3 v low 5%
Leonora Aero 27.6   36.2 21st 12.5   4.6 23rd 3.6
Munglinup West 22.3 +2.4 34.9 21st 8.7 +1.4 4.5 14th 34.4 39.4 average 87%
Norseman Aero 23.7 +1.4 36.0 21st 7.9 +1.6 2.0 14th 42.2 23.8 high 177%
Salmon Gums Res.Stn. 22.9 +2.5 35.5 21st 7.2 +1.4 0.3 15th 42.4 32.1 high 132%
Southern Cross Airfield 24.3 +2.8 32.7 21st 9.0 +3.7 2.9 14th 31.6 22.9 high 138%
Yeelirrie 29.5 +3.7 34.9 21st 10.4 +2.5 3.8 23rd 0 4.8 lowest 0%
North East (district 13)
Balgo Hills 35.8 +1.9 39.6 30th 19.0 +0.3 14.1 24th 0 3.0 lowest 0%
Carnegie 31.8 +3.2 37.2 21st 14.0 +2.5 7.4 24th 0.2 3.8 average 5%
Giles Meteorological Office 30.8 +3.3 35.3 28th 14.8 +1.8 8.8 25th 0 10.8 lowest 0%
Telfer Aero 35.3 +2.5 38.3 30th 18.1 +1.6 11.2 24th 0 2.3 lowest 0%
Warburton Airfield 31.3 +3.3 37.1 27th 14.8 +3.5 8.8 24th 0 5.6 lowest 0%
Wiluna 30.1 +3.8 34.9 20th 13.3 +3.4 6.5 23rd 0.5 5.0 average 10%
Offshore Islands (district 200)
Adele Island 28.7   30.3 3rd 24.0   22.5 2nd
Browse Island 28.7   30.4 19th 25.3   24.3 1st
Christmas Island Aero 26.8 +0.6 27.4 29th 22.6 +0.4 21.5 6th 0.2 42.7 v low 0%
Cocos Island Airport 28.7 +0.5 29.6 4th 24.8 +0.9 22.9 28th 198.6 94.2 high 211%

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.

A Climate Summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 10 am on Wednesday 1 October 2014. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Averages for individual sites 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 used for temperature area averages.

Further information

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