Western Australia in September 2013: Wet & warm nights in the Southwest

  • Rainfall: above average rainfall for WA, 6th wettest for southwest WA
  • Maximum temperature: 10th warmest for WA, near average for southwest WA
  • Minimum temperature: 4th warmest for WA, 2nd warmest on record for southwest WA

Rainfall

Rainfall in September 2013 was below to very much below average over the north and east Kimberley, Northern Interior and areas in the inland Pilbara, Gascoyne and Southern Interior. Much of the Southwest Land Division (SWLD), Goldfields, Eucla, as well as various parts in the Pilbara and Gascoyne received above to very much above average rainfall, with a dozen locations in the Lower Southwest registering their wettest September on record, as the result of persistent westerly winds during September in the region with the frequent passage of cold fronts, lows and troughs

For WA as a whole, rainfall in September 2013 was above average, however averaged across the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), September 2013 was the 6th wettest September on record. For the wider SWLD region, rainfall ranked as the 7th wettest September on record.

A westerly airstream produced mainly light showers in western parts of the SWLD on the 1st and 2nd before a cold front and associated cloudband moved through western parts of WA bringing widespread rainfall to the SWLD and southern Gascoyne and Goldfields on the 3rd and 4th.

A trough and associated low developed near the west coast on the 6th and moved across central and southeastern WA to bring widespread showers and thunderstorms to the southern WA on the 7th and 8th. Moderate to heavy falls were recorded in parts of the SWLD and southern Goldfields and a number of locations in the Central Wheat Belt and South Coastal witnessed their wettest September day on record during the event.

Two cold fronts moved through the SWLD on the 10th and 11th producing showers and thunderstorms in much of the SWLD, southern Gascoyne, Goldfields and Eucla. Moderate to heavy falls were mainly in the southwes of the SWLD.

A strong cold front and associated low moved slowly across the SWLD from the evening of the 13th to 14th, bringing showers and thunderstorms and strong winds to western and southern WA with moderate to heavy falls near the coast. Lort River in the Southeast Coastal recorded 32.0 mm on the 15th, which was their wettest September day in 44 years of record.

A strong cold front again moved through the SWLD on the 16th and 17th producing widespread showers across the SWLD with moderate falls in the Lower West, Southwest and South Coastal.

A westerly airstream in the wake of front continued to bring light showers between the 18th and the 20th before two strong cold fronts moved across the SWLD on the 22nd and 23rd producing damaging winds and showers to the SWLD. At least 15 homes were badly damaged in Maddington in the Perth metropolitan area. SES Service volunteers responded to more than 88 calls for help, including at least 30 in the Gosnells and Maddington area. About 20,000 properties were without electricity, in areas around Perth, Manjimup, Busselton, Pemberton and Bunbury.

A number of weak cold fronts and a westerly airstream continued to produce mainly light rainfall in parts of the SWLD from the 24th to 27th. A cold front and associated cloudband moved through the SWLD on the 29th bringing widespread rainfall to the SWLD, with moderate to heavy falls in the South Coastal and Southeast Coastal districts.

Maximum temperature

Very much above average mean maximum temperatures were observed in eastern parts of WA,the adjacent east Pilbara, and southern coastal region. The highest on record was observed in the eastern Southern Interior and adjacent Northern Interior with mean maximum temperature up to 5 °C warmer than normal. Eucla and Eyre as well as Warburton Airfield in the Southern Interior observed their warmest September on record. Mean maximum temperature was near average for the remainder of the Sate.

Averaged across the state as a whole, the mean maximum temperature for WA in September 2013 was above average. For the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) the mean maximum temperature was near average.

With the exception of a few mild to warm days, hot to very hot days were dominant in the Kimberley, Northern Interior and Southern Interior. The highest temperature of the month in WA was 41.6 °C at Fitzroy Crossing Aerodrome on the 26th and 27th. Halls Creek Airport recorded a daily maximum temperature of 40.2 °C on the 27th, which was the highest temperature in September on record in 66 years of record.

Mild to warm days were experienced in the southern half of WA. with daily maxima 10-12 °C warmer than normal observed in southeastern parts in the first three days of September 2013, whilst the Pilbara observed hot days for the first 5 days. Cool to cold days were recorded in the southeast Gascoyne, SWLD, Goldfields, Southern Interior and Eucla from the 4th to 9th and again on the 14th, 15th, 17th, 29th and 30th due to wet and cloudy conditions, interspersed with a hot day or two on the 10th and 11th. The lowest temperature of the month in WA was 12.5 °C on the 29th at Manjimup. Warm to hot days returned to the Eucla district from the 20th to the end of the month. Eyre recorded 3 days with daily maxima of 34 °C or higher during September, which was the equal highest number of such days on record, equaling with 2012 and 2001.

Minimum temperatures

Much of WA saw above to very much above average mean minimum temperatures in September 2013, with highest on record in parts of SWLD and Eucla, as the result of warmer than normal sea surface temperatures surrounding the WA coast. Over a dozen locations in the SWLD and Eucla recording their highest mean minimum on record. Mean minima up to 4 °C warmer than normal were recorded in the eastern Eucla and parts of the Southern Interior. Most of the Kimberley and adjacent parts of the Pilbara and Northern Interior were near average in terms of mean minimum temperature.

Averaged across the state as a whole, the mean minimum temperature for WA in September 2013 was the 4th warmest September since comparable records began in 1910. Averaged across the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), the mean minimum temperature was the 2nd warmest on record.

Nights were predominantly mild to warm in the Southwest Land Division, Goldfields, Southern Interior and Eucla, interspersed with a few cool to cold nights on the 5th, 6th, 9th, from the 16th to 18th, 26th, 27th and 30th. A number of sub-zero temperatures were registered during those cold nights and the lowest temperature of the month in WA was -1.5 °C at Salmon Gums Research Station on the 6th.

In the north, warm nights were experienced from the 2nd to 8th in the Pilbara and Gascoyne, which contrasted to cool nights in the Kimberley. Cool nights were observed on the 13th, 16th and 21st in the Pilbara and west Kimberley whilst warm nights were evident in the Gascoyne and southern Pilbara on the 22nd and 24th, and in the north and east Kimberley from the 27th to the 30th. Warmun in the Kimberley recorded the highest minimum temperature of the month in WA with 27.0 °C on the 29th.

Other Phenomena

A series of strong cold fronts, associated with a deep, complex low pressure system, affected the Southwest Land Division from early Sunday September 22 until Tuesday September 24. A wind gust of 79 knots (146km/h) was recorded at Cape Leeuwin on the 22nd. A tornado was also reported in the southeast suburbs of Perth at Maddington, where significant structural damage occurred.The second, and strongest, cold front moved over the southwest region in the early hours of Sunday the 23rd. Widespread damaging winds were experienced over the SWLD. About 20,000 properties were without electricity, in areas around Perth, Manjimup, Busselton, Pemberton and Bunbury. SES Service volunteers responded to more than 88 calls for help, including at least 30 in the Gosnells and Maddington area. Flooding has forced the closure of a northbound lane of the Kwinana Freeway before South Terrace in Como.

Further information

Media
(03) 9669 4057
Enquiries

Extremes in September 2013
Hottest day 41.6 °C at Fitzroy Crossing Aero on the 26th & 27th
Warmest days on average 38.8 °C at Fitzroy Crossing Aero
Coolest days on average 16.7 °C at Bickley
16.7 °C at Manjimup
Coldest day 12.5 °C at Manjimup on the 29th
Coldest night -1.5 °C at Salmon Gums Res.Stn. on the 6th
Coolest nights on average 6.2 °C at Newdegate Research Station
Warmest nights on average 25.9 °C at Browse Island
23.2 °C at Argyle Aerodrome
Warmest night 27.0 °C at Warmun on the 29th
Wettest overall 319.2 mm at Mount William
Wettest day 74.0 mm at Northcliffe on the 15th
Highest wind gust 146 km/h at Cape Leeuwin on the 22nd

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 September daily rainfall
Highest daily rainfall
in September 2013 (mm)
Previous wettest
for September
Years of
record
Burracoppin 32.6 on the 7th 25.4 on the 25th in 1970 104
Seven Oaks 31.0 on the 7th 23.4 on the 18th in 1932 77
Lort River 32.0 on the 15th 26.8 on the 23rd in 1985 44
Jarrahwood 45.0 on the 23rd 37.0 on the 6th in 2000 39



Record highest total September rainfall
Total rainfall
for September 2013 (mm)
Previous wettest
for September
Years of
record
Average for
September
Belka 66.6 58.2 in 1917 102 23.8
Doodlakine 59.3 57.6 in 1955 99 22.8
Northcliffe 323.8 251.5 in 1927 88 144.4
Balingup 246.0 177.0 in 1941 87 89.3
Cherry Tree 104.8 102.4 in 1996 87 44.7
Hyden 67.8 60.4 in 1996 84 28.2
Woodanilling 116.1 108.6 in 1923 78 45.0
Nanyanine 73.0 70.4 in 1992 75 25.1
Pemberton 261.7 259.8 in 1996 73 130.6
Perth Airport 169.4 163.0 in 1971 70 73.6
Walpole 280.4 240.7 in 2012 62 139.8
Warner Glen 270.0 206.8 in 1996 62 103.6
Pearce RAAF 163.9 136.5 in 1971 59 70.0
Windrush 172.2 159.3 in 1959 53 74.7
Kojonolokan Hills 91.8 87.8 in 1996 51 39.9
Chesalon 107.5 93.8 in 1997 48 41.3
Roleystone 252.8 225.6 in 1971 46 115.1
Bickley 295.8 226.9 in 1973 45 127.4
Culford 191.6 151.8 in 1971 44 70.2
Jurien Bay 81.2 81.0 in 1999 44 45.5
Denbarker 172.0 149.0 in 2009 42 88.4
Bindoon 159.8 122.3 in 1973 40 66.2
Ferguson Valley 212.0 201.0 in 1996 40 103.8
Jarrahwood 253.8 187.2 in 1996 39 108.2
Swan View 177.8 135.8 in 1996 38 84.1
Pickering Brook 290.1 182.0 in 2003 36 123.5




Record highest September temperature
Highest temperature
in September 2013 (°C)
Previous warmest
for September
Years of
record
Average for
September
Halls Creek Airport 40.2 on the 27th 39.9 on the 30th in 1998 66 34.0



Record highest September mean daily maximum temperature
Mean daily maximum
temperature
for September 2013 (°C)
Previous warmest
for September
Years of
record
Average for
September
Eucla 24.8 24.0 in 2012 76 21.3
Giles Meteorological Office 31.7 31.5 in 1980 57 27.4
Eyre 24.2 24.1 in 2012 53 21.2
Warburton Airfield 31.9 30.7 in 2007 39 27.9



Record highest September mean daily minimum temperature
Mean daily minimum
temperature
for September 2013 (°C)
Previous warmest
for September
Years of
record
Average for
September
Eucla 11.3 11.1 in 1961 76 9.1
Dwellingup 9.0 8.4 in 1963 75 6.4
Geraldton Airport Comparison 11.4 11.3 in 1963 71 9.2
Corrigin 7.7 7.5 in 1963 65 5.7
Esperance 10.4 = 10.4 in 1995 44 9.5
Beverley 8.3 7.6 in 1983 43 5.8
Narembeen 8.3 7.7 in 1996 42 6.1
Pingelly 7.8 7.7 in 1981 41 6.4
Hyden 7.7 6.9 in 2001 40 5.8
Wagin 8.7 7.7 in 1996 38 6.1
Jarrahwood 8.5 7.9 in 1983 31 6.0


Summary statistics for September 2013
Maximum temperatures
for September
(°C)
Minimum temperatures
for September
(°C)
Rainfall
for September
(millimetres)
Mean for
September
2013
Diff
from
average
Highest for
September
2013
Mean for
September
2013
Diff
from
average
Lowest for
September
2013
Total for
September
2013
Average
for
September
Rank of
September
2013
Fraction of
September
average
North Kimberley (district 01)
Doongan 35.9 +0.6 38.9 22nd 18.1 +0.5 13.0 6th 41.0 6.8 v high 603%
Kalumburu 36.8 +1.2 40.7 25th 19.5 +0.3 14.8 6th 0 1.7 v low 0%
Mount Elizabeth 35.0 +0.9 37.9 25th 14.2 -0.7 9.4 7th 0 8.4 lowest 0%
Troughton Island 30.9 +0.7 32.6 24th 25.5 +1.0 23.6 3rd 0 0.3 lowest 0%
Truscott 33.9   38.4 18th 22.5   18.7 6th 0 0.2 v low 0%
Wyndham 37.7 +1.0 40.3 21st 22.8 0.0 18.9 7th 0 4.0 lowest 0%
Wyndham Aero 38.6 +1.0 40.8 27th 22.3 +0.5 18.1 7th 0 3.9 lowest 0%
East Kimberley (district 02)
Argyle Aerodrome 37.9 +1.5 40.8 26th 23.2 +1.0 18.7 8th 2.4 2.6 average 92%
Halls Creek Airport 36.2 +2.2 40.2 27th 20.7 +1.7 16.6 7th 0 4.6 lowest 0%
Kununurra Aero 38.3 +1.7 40.6 25th 19.4 -0.7 15.2 8th 0 3.0 lowest 0%
Warmun 38.0 +1.9 40.5 26th 21.0 +1.6 16.5 7th 0 4.5 lowest 0%
West Kimberley (district 03)
Bidyadanga 32.8 0.0 36.7 28th 17.5 0.0 13.0 16th 0.8 1.3 high 62%
Broome Airport 30.7 -1.1 33.9 16th 19.8 +1.3 15.9 16th 0.6 1.4 average 43%
Curtin Aero 37.6 +1.1 41.3 28th 17.6 -0.8 14.5 21st 0 0.2 v low 0%
Derby Aero 36.7 +1.4 41.4 28th 18.9 -0.6 16.5 20th 0 1.1 lowest 0%
Fitzroy Crossing Aero 38.8 +1.6 41.6 27th 18.8 +0.1 15.2 17th 0 0.4 v low 0%
West Roebuck 33.1 -1.4 36.3 3rd 18.4 +0.9 13.8 16th 1.2 0.7 high 171%
De Grey (district 04)
Bedout Island 27.9   30.0 3rd 22.1   21.0 16th
Karratha Aero 31.0 +0.4 36.5 4th 17.1 +0.2 12.5 16th 0 1.4 lowest 0%
Legendre Island 28.4   32.7 4th 20.2   18.1 15th
Mandora 33.6 -0.1 40.3 2nd 15.0 -0.7 9.0 18th 1.4 1.0 v high 140%
Marble Bar 35.1 +0.6 39.2 3rd 16.0 -0.7 12.5 18th 0 5.2 v low 0%
Pardoo Station 33.3 +0.4 38.5 3rd 14.9 -1.1 7.0 29th 6.0 2.9 v high 207%
Port Hedland Airport 32.1 -0.2 39.2 4th 16.1 +0.7 12.0 17th 1.4 1.3 high 108%
Roebourne 33.9 +1.3 39.1 4th 16.6 -0.2 12.5 19th 0.4 1.4 high 29%
Roebourne Aero 33.6 +0.6 39.2 4th 15.2 -0.3 9.9 19th 0 2.9 v low 0%
Fortescue (district 05)
Barrow Island Airport 26.8 0.0 31.7 6th 20.1 +0.7 17.8 15th 0 0.8 v low 0%
Christmas Creek 32.8   36.2 3rd 15.6   10.5 17th 1.2
Learmonth Airport 29.5 +0.2 35.2 5th 14.0 +0.2 8.8 16th 0.2 2.0 average 10%
Mardie 31.6 -0.6 37.8 4th 15.0 +0.7 10.2 16th 0 1.4 lowest 0%
Onslow Airport 30.5 +0.5 36.5 5th 16.5 +1.2 11.8 16th 0 1.4 lowest 0%
Wittenoom 33.4 +2.3 37.2 3rd 17.8 +1.0 11.4 16th 0 3.2 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 24.1 -0.3 26.5 28th 14.9 +1.1 10.5 19th 8.4 5.7 high 147%
Denham 23.3 -0.5 26.4 28th 15.7 +0.9 11.7 18th 7.2 7.8 average 92%
Emu Creek Station 30.7 +0.1 37.0 28th 14.3 +0.3 8.9 16th 7.1 2.1 v high 338%
Murchison 25.7 -0.4 32.0 28th 11.7 +2.4 7.0 18th 7.2 7.7 average 94%
Shark Bay Airport 25.1 -0.7 29.0 6th 13.1 +0.5 8.7 21st 4.8 7.9 low 61%
East Gascoyne (district 07)
Newman Aero 31.9 +1.6 36.2 28th 14.1 +2.2 7.0 16th 0.2 4.3 average 5%
Paraburdoo Aero 31.7 +0.5 36.8 28th 14.0 +0.6 8.9 20th 0 3.4 lowest 0%
Murchison (district 07A)
Meekatharra Airport 26.1 +0.5 33.4 29th 11.7 +0.2 4.9 18th 1.2 4.7 average 26%
Mount Magnet Aero 24.9 +0.5 31.7 28th 11.2 +1.0 5.6 16th 6.4 9.0 average 71%
Paynes Find 23.3 -0.4 29.4 28th 9.1 +1.1 4.3 16th 21.6 14.6 high 148%
North Coast (district 08)
Carnamah 21.8 -0.2 26.1 28th 9.5 +1.4 5.2 16th 45.3 28.3 high 160%
Dalwallinu 20.5 -0.4 25.8 28th 8.3 +1.6 3.1 16th 36.2 26.9 high 135%
Geraldton Airport 22.1   26.3 6th 11.3   5.3 5th 49.8
Kalbarri 24.0 +0.1 28.3 6th 12.1 +1.4 7.0 16th 18.5 23.4 average 79%
Morawa Airport 22.4 -0.5 27.7 28th 9.3 +1.9 4.3 18th 20.0 24.2 average 83%
Mullewa 23.0 -0.4 28.6 28th 10.0 +1.5 5.9 18th 24.9 21.7 average 115%
North Island 23.1 +1.1 24.8 10th 16.1 +0.3 8.8 16th 17.0 21.8 average 78%
Wongan Hills 20.0 -0.6 24.0 2nd 8.9 +1.3 3.8 5th 71.6 29.8 v high 240%
Central Coast (district 09)
Badgingarra Research Stn 18.9 -1.7 21.9 2nd 8.4 +0.8 4.4 16th        
Bickley 16.7 -0.7 19.9 2nd 9.6 +1.4 6.7 17th 295.8 127.4 highest 232%
Champion Lakes 19.2   23.3 2nd 11.7   7.5 16th 166.4
Garden Island HSF 19.0 +0.2 21.3 2nd 13.7 +1.9 9.7 6th 151.6 68.0 v high 223%
Gingin Aero 20.1 -0.4 22.6 21st 9.5 +2.2 3.9 9th 161.2 88.6 v high 182%
Gosnells City 20.5 -0.2 24.1 2nd 11.5 +1.5 7.1 6th        
Jandakot Aero 19.7 -0.3 22.5 2nd 10.8 +2.7 3.3 6th 173.2 88.4 v high 196%
Jurien Bay 21.1 -0.1 25.0 6th     5.0 5th 81.2 45.5 highest 178%
Karnet 17.0 -0.5 20.4 2nd 8.7 +1.5 4.0 6th 272.8 134.7 v high 203%
Lancelin 20.7 +0.2 24.0 6th     7.0 5th 76.2 56.4 high 135%
Pearce RAAF 20.2 +0.2 23.3 2nd 10.3 +1.6 5.6 9th 163.9 70.0 highest 234%
Perth Airport 20.1 0.0 22.7 9th 10.6 +1.8 4.3 6th 169.4 73.6 highest 230%
Perth Metro 20.2 0.0 23.6 2nd 11.6 +2.2 5.3 6th 144.2 80.9 v high 178%
Rottnest Island 19.2 +0.5 21.6 2nd 13.9 +1.1 10.5 17th 107.0 58.5 v high 133%
Swanbourne 20.1 +0.3 23.0 6th 12.5 +1.6 8.4 6th 160.8 84.8 highest 190%
South Coast (district 09A)
Albany 18.6 +1.4 23.1 1st 10.7 +1.4 7.0 17th 174.0 102.2 v high 170%
Albany Airport 18.5   22.8 2nd 8.9   4.8 16th 150.4
Albany Airport Comparison 18.2 +0.9 23.1 1st 9.1 +1.1 5.6 16th 157.2 88.5 highest 178%
Bridgetown 17.1 -0.4 21.1 2nd 8.3 +2.4 2.9 6th 31.6 92.1 v low 34%
Bunbury 18.4 0.0 21.3 2nd 11.6 +3.2 5.6 9th 183.8 86.4 v high 213%
Busselton Aero 18.8 +0.6 21.3 2nd 10.2 +2.6 4.6 6th
Cape Leeuwin 17.5 +0.4 20.1 2nd 12.9 +1.1 9.5 17th        
Cape Naturaliste 18.1 +0.8 21.7 2nd 11.8 +1.4 7.8 17th        
Collie East 17.7 -0.5 21.4 2nd 8.4 +3.1 2.7 27th 218.8 101.1 v high 216%
Donnybrook 18.8 0.0 23.5 2nd 10.1 +3.0 5.4 17th 243.2 103.6 v high 235%
Dwellingup 17.2 0.0 20.8 2nd 9.0 +2.6 2.6 6th 248.4 132.4 v high 188%
Esperance 20.5 +1.1 25.8 3rd 10.4 +0.9 6.4 6th 71.0 61.9 average 115%
Esperance Aero 20.3 +1.6 25.6 3rd 9.1 +0.8 4.3 6th 69.4 58.0 average 120%
Harvey 18.6 0.0 21.5 2nd     6.0 8th 209.8 121.3 v high 173%
Hopetoun North 20.9 +0.6 27.3 10th 10.5 +1.9 6.3 18th 106.8 53.6 high 199%
Jarrahwood 18.0 -0.1 20.8 2nd 8.5 +2.5 1.5 6th 253.8 108.2 highest 235%
Mandurah 18.8 -0.1 20.8 6th 13.6 +2.0 9.9 9th 158.4 72.7 v high 218%
Manjimup 16.7 +0.2 21.5 2nd 8.4 +1.2 4.6 30th        
North Walpole 17.3   21.5 2nd 10.3   6.2 17th  
Pemberton 17.1 +0.4 21.2 2nd 9.1 +1.5 5.4 6th 261.7 130.6 highest 200%
Rocky Gully 16.9 +0.5 21.3 2nd 8.2 +1.1 4.2 30th 197.2 100.7 v high 196%
Windy Harbour 18.1 +0.5 21.9 2nd 9.8 +0.4 6.0 7th 258.3 115.4 v high 224%
Witchcliffe 17.7 +0.3 21.4 2nd 10.5 +1.9 6.3 9th 241.0 125.2 v high 192%
North Central (district 10)
Bencubbin 20.5 -0.4 26.0 28th 8.8 +1.6 3.2 30th 33.8 22.0 high 154%
Cunderdin Airfield 20.0 -0.7 23.1 28th 7.4 +2.7 0.8 6th 69.6 28.8 v high 242%
Kellerberrin 20.5 -0.2 24.3 28th 7.1 +0.7 0.5 5th 67.0 26.4 v high 254%
Merredin 20.7 +0.3 25.8 28th 7.9 +1.2 2.3 5th 42.8 25.9 high 165%
Northam 20.1 -0.4 23.2 21st 8.6 +1.8 3.5 5th 75.3 37.5 v high 201%
York 19.8 -0.2 22.5 21st 7.0 +2.3 1.0 6th 83.2 41.3 v high 201%
South Central (district 10A)
Beverley 19.9 -0.4 22.8 21st 8.3 +2.5 2.6 6th 80.2 36.5 v high 220%
Brookton 18.8 -0.3 21.9 2nd 6.7 +1.4 2.6 16th 97.8 38.9 v high 251%
Hyden 20.0 -0.3 25.0 2nd 7.7 +1.9 1.5 5th 67.8 28.2 highest 240%
Jacup 19.2 +0.5 25.0 10th 7.5 +1.3 1.8 6th 7.6 45.5 v low 17%
Katanning 17.4 0.0 20.9 2nd 7.8 +1.8 3.7 6th 123.6 56.8 v high 218%
Lake Grace 19.1 0.0 23.4 10th 8.1 +1.8 3.0 27th 46.0 29.4 high 156%
Narembeen 20.0 -0.4 24.2 10th 8.3 +2.2 1.6 5th 65.1 26.1 v high 249%
Narrogin 18.0 +0.3 20.9 1st 7.6 +1.6 1.9 6th 102.5 46.9 v high 219%
Newdegate Research Station 18.8 +0.1 22.5 2nd 6.2 +1.4 -0.7 6th 33.4 33.9 average 99%
Ongerup 17.9 +0.1 22.4 10th 7.7 +1.2 1.5 6th 77.2 38.6 v high 200%
Pingelly 18.4 +0.1 21.5 21st 7.8 +1.4 3.9 27th 104.0 41.1 v high 253%
Ravensthorpe 20.1 +0.6 25.0 10th 8.5 +1.1 4.7 6th 120.4 42.1 v high 286%
Wagin 18.3 +0.2 21.7 2nd 8.7 +2.6 3.2 6th 78.0 41.5 v high 188%
Wandering 18.0 -0.2 20.9 2nd 7.2 +2.5 0.9 6th 137.2 61.9 v high 222%
Eucla (district 11)
Balladonia 23.9 +1.6 32.1 2nd 8.0 +1.2 0.5 5th 16.9 20.0 average 85%
Eucla 24.8 +3.5 35.6 22nd 11.3 +2.2 4.0 26th 41.4 22.5 high 184%
Eyre 24.2 +3.0 35.6 3rd 7.9 +0.2 -1.2 28th 29.7 23.7 high 125%
Forrest 26.2 +1.9 36.7 29th 10.4 +2.2 3.9 26th 24.4 16.6 high 147%
Red Rocks Point 22.9   36.1 22nd 11.3   5.3 10th 36.8 31.4 average 117%
South East (district 12)
Bulga Downs 25.4 +0.4 32.2 2nd 9.6 +0.9 2.5 18th 15.0 7.8 high 192%
Kalgoorlie-Boulder Airport 22.6 +0.3 30.4 2nd 9.3 +1.3 2.3 5th 28.6 14.3 high 200%
Laverton Aero 24.9 +0.5 33.4 2nd 11.2 +0.9 4.0 18th 25.2 8.6 v high 293%
Leinster Aero 25.0 -0.5 32.9 29th 11.3 +0.7 4.7 18th 14.8 4.5 v high 329%
Leonora 24.9 0.0 32.9 2nd 11.4 +1.4 4.4 18th 24.8 9.0 v high 276%
Leonora Aero 24.8   32.5 2nd 11.2   3.9 18th 19.8
Munglinup West 20.3 +0.5 26.2 10th 8.7 +1.5 3.9 5th 63.0 39.8 high 158%
Norseman Aero 22.6 +0.3 29.3 2nd 7.8 +1.6 -0.9 5th 21.2 22.5 average 94%
Salmon Gums Res.Stn. 21.7 +1.4 27.8 3rd 7.1 +1.4 -1.5 6th 56.2 32.0 high 176%
Southern Cross Airfield 21.6 +0.1 27.6 10th 8.4 +3.3 2.7 5th 32.6 22.4 high 146%
Yeelirrie 26.1 +0.3 34.2 29th 9.6 +1.8 4.8 20th 26.1 4.8 v high 544%
North East (district 13)
Giles Meteorological Office 31.7 +4.3 35.9 22nd 15.1 +2.2 8.8 16th 2.4 10.9 average 22%
Telfer Aero 34.8 +2.1 38.5 3rd 18.2 +1.7 13.3 16th 0 2.4 lowest 0%
Warburton Airfield 31.9 +4.0 37.4 29th 13.2 +2.0 4.0 19th 3.4 5.7 average 60%
Wiluna 26.1 -0.2 35.7 29th 10.6 +0.7 5.1 18th 54.3 5.0 v high 1086%
Offshore Islands (district 200)
Adele Island 28.8   29.7 9th 24.6   23.6 1st
Browse Island 28.3   29.8 2nd 25.9   24.8 16th
Christmas Island Aero 26.9 +0.7 27.8 12th 22.5 +0.3 19.0 29th 4.4 43.7 low 10%
Cocos Island Airport 28.2 0.0 29.2 5th 24.2 +0.3 22.2 30th 80.4 93.3 average 86%
Varanus Island 26.7 -0.1 30.1 5th 20.7 0.0 17.8 15th 2.0 0.5 high 400%

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 Tuesday 1 October 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

Media
(03) 9669 4057
Enquiries