Western Australia in July 2013: a dry month

  • Rainfall: below average for WA
  • Maximum temperature: above average for WA
  • Minimum temperature: near average for WA

Rainfall

Rainfall in July 2013 was below to very much below average over the western and southern Gascoyne, central Goldfields, and much of the Southwest Land Division (SWLD). Pockets of above to very much above average rainfall were observed in the Great Southern, western Southeast Coastal, southern Goldfields, and Eucla, largely as a result of a significant rainfall event that moved through these areas from the 11th to 13th. Little if any rainfall was reported across much of the Pilbara, Kimberley, and northern Interior during July 2013, and although large parts of the Pilbara and west Kimberley reported below to very much below average rainfall, it is typically a dry month in the north. The remainder of the State saw near average rainfall.

For WA as a whole, as well as for the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) and the SWLD, rainfall during July 2013 was below average. As a result of June being extremely dry in the SWLD, the June-July period for both the Lower Southwest and SWLD was the fourth driest since comparable records commenced in 1900. Only 1976, 2006 and 2001 were drier in the Lower West, whilst for the SWLD as a whole, only 1976, 2006, and 1977 were drier.

A number of weak cold fronts and subsequent onshore flow produced mainly light rainfall in the SWLD and Eucla between the 2nd and the 7th, with some moderate falls near the SWLD south coast, while a weak trough over central parts of the State produced areas of rain in the northern Goldfields on the 7th. A cold front and associated cloudband moved through southern WA on the 9th and 10th, bringing widespread rainfall to the SWLD and southern Goldfields with moderate falls in the Lowest West and adjacent Southwest district. A complex low pressure system moved across the southern half of the State into the Bight between the 11th and 13th bringing widespread significant rainfall to the SWLD and adjacent Gascoyne and Goldfields. A number of sites in the Central Wheat Belt, Great Southern, and South and Southeast Coastal recorded their wettest July day on record during the event, including Tamaru in the South Coastal which recorded 99.3 mm in the 24 hours to 9am on the 13th, its wettest July day in 48 years of record. A slow moving cold front moved through the SWLD on the 15th bring widespread showers to the region and heavy falls of 60 mm to 100 mm were reported in the Margaret River region of the Southwest district with some localised flooding. A daily total of 99.4 mm at Witchcliffe on the 15th was the highest daily rainfall of the month in the State. A strong cold front moved through the SWLD, Gascoyne, Goldfields, and Eucla on the 16th and 17th, bringing widespread rainfall to these regions, with thunderstorms and damaging winds reported in the SWLD. A strong cold front and cloudband moved across western and southern WA on the 24th to produce widespread rainfall in the southern Gascoyne and SWLD, with moderate to heavy falls in the Southwest and Lower West districts. Wokalup in the Southwest recorded 63.6 mm in the 24 hours to 9am on the 24th, its highest July daily fall in 62 years of record. Another strong cold front and cloudband moved across the southern half of WA on the 26th and 27th producing widespread rainfall with moderate falls, particularly in the Lower West. A weak cold front brushed through the southwest corner overnight on the 31st bringing generally light showers to much of the SWLD with moderate falls observed in the Southwest and Lower West.

Maximum temperature

Above to very much above average mean maximum temperatures were observed in the Kimberley and adjacent Northern Interior, the southern Pilbara, west Gascoyne, SWLD, eastern Eucla, and eastern Southern Interior, with areas up to 3 °C warmer than normal in the eastern Eucla. Much of the Pilbara, east Gascoyne, Goldfields, Southern Interior, and Southeast Coastal saw near average temperatures.

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

The first week or so of July 2013 saw varying cool to warm conditions across the State, but from the 9th to 16th warmer than normal conditions dominated most regions. Relatively cool conditions were most common from the 17th to 21st, but from the 23rd to the end of the month, mostly warmer than normal conditions prevailed. Wet and cloudy conditions resulted in a cold day in the Goldfields and southern Gascoyne on the 7th, and Yeelirrie in the Goldfields recorded the lowest maximum temperature of the month in the State with 9.3 °C on the 7th, its second coldest July day in 39 years of record, only behind a maximum of 9.0 °C on 13 July 2004. Light winds and a warming airmass in the north saw consecutive hot days in the Kimberley on the 14th and 15th with daily maxima over 35.0 °C at a number of sites. Curtin Aerodrome in the west Kimberley observed the highest maximum temperature of the month in the State with 36.5 °C on the 14th, which was the second hottest July day in 21 years of record at the site, only behind 36.7 °C on 30 July 1992. A cold day was observed in much of the SWLD on the 17th as cold southerly winds and wet conditions swept across the region. Both Manjimup and Mount Barker recorded a daily maximum temperature of 9.6 °C.

Minimum temperatures

A broad area extending from the Pilbara, through the adjacent Northern Interior, Southern Interior, eastern Goldfields, and Eucla, saw above to very much above average mean minimum temperatures in July 2013, as did parts of the east Kimberley. Means up to 3 °C warmer than normal were recorded in the inland southern Pilbara and far northern Gascoyne, as well as in the far east Kimberley. In contrast, below to very much below average mean minimum temperatures occurred in the southwest Gascoyne and much of the northern and central SWLD, with means up to 2 °C cooler than normal reported in these regions.

Averaged across the state as a whole, the mean minimum temperature for WA in July 2013 was near average, while averaged across the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) the mean minimum temperature was also near average.

Varying conditions, in terms of minimum temperatures, were reported across the State during the beginning of July but from the 10th to 17th predominantly warmer than normal conditions prevailed, before returning to more variable conditions for the remainder of the month. Persistent fresh northwesterly winds and above average sea surface temperatures resulted in a record high minimum temperature at Cape Leeuwin on the 1st. A minimum of 17.7 °C was the highest minimum during July in 106 years of record, easily exceeding the previous record of 16.7 °C on 5 July 1913. In contrast, cold nights were reported across southern WA from the 5th to the 9th as a result of generally clear skies and light winds. Many sub-zero temperatures were reported, aided by particularly dry soils following an extremely dry June, and a number of sites in the SWLD experienced their coldest or equal coldest night in July on record on the 8th. Wandering in the Great Southern recorded a minimum of -4.8 °C on the 8th, the lowest temperature recorded in WA in July 2013. Cloudy skies and northwesterly winds on the 15th kept temperatures unusually mild overnight in southwest WA with stations in the Southwest and South Coastal districts breaking their highest minimum temperature on record for July. Cold nights were again observed in western parts of the State between the 18th and 22nd as Lancelin in the Lower West recorded a temperature of 1.5 °C on the 21st, its equal lowest temperature in 49 years of record, equal with a minimum of 1.5 °C on 25 July 1979.

Other Phenomena

A series of cold fronts moved through the SWLD between the 15th and 17th, bringing heavy rainfall and damaging winds to southern districts. Flash flooding was reported in the Southwest as rainfall totals in the 60 mm to 100 mm range were reported on the morning of the 15th and a river crossing was washed away as a result. Severe wind gusts of 100 km/h to 115 km/h were recorded at coastal sites in the Lower West, Southwest, and Southeast Coastal on the 16th and 17th, resulting in more than 6000 homes in the Perth metropolitan area and southwest WA without power. The WA Department of Fire and Emergency Services (DFES) received more than 138 calls for assistance.

Numerous damaging wind gusts (between 90 km/h and 102 km/h) were recorded across southern WA as a strong cut off low and associated cold front passed over the region from the 25th to the 27th. DFES received a total 53 calls for help during this period, with damage reported in the Mandurah suburbs of Halls Head and Silver Sands, as well as in Kalgoorlie, Moora, and York. In the Perth metropolitan area, 22 calls for assistance were received overnight on the 26th and on the morning of the 27th with damage occurring in the northern suburbs of Heathridge and Beldon.


Further information

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Extremes in July 2013
Hottest day 36.5 °C at Curtin Aero on the 14th
Warmest days on average 32.8 °C at Wyndham Aero
Coolest days on average 14.9 °C at Katanning
Coldest day 9.3 °C at Yeelirrie on the 7th
Coldest night -4.8 °C at Wandering on the 8th
Coolest nights on average 2.4 °C at York
Warmest nights on average 23.4 °C at Troughton Island
19.2 °C at Truscott
Warmest night 25.2 °C at Troughton Island on the 23rd
24.5 °C at Wyndham on the 8th
Wettest overall 275.0 mm at Mount William
Wettest day 99.4 mm at Witchcliffe on the 15th
Highest wind gust 115 km/h at Cape Naturaliste on the 16th

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 July daily rainfall
Highest daily rainfall
in July 2013 (mm)
Previous wettest
for July
Years of
record
Corrigin 62.5 on the 12th 45.6 on the 30th in 2001 104
Colorado 61.0 on the 12th 46.0 on the 8th in 1930 101
Koorikin 59.4 on the 12th 45.2 on the 30th in 2001 101
Ardath 57.0 on the 12th 50.0 on the 12th in 1990 96
Kondinin 71.0 on the 12th 45.6 on the 30th in 2001 96
Narembeen 38.6 on the 12th 31.0 on the 15th in 1978 87
Warner Glen 78.0 on the 15th 76.2 on the 3rd in 1955 64
Wokalup 63.6 on the 24th 52.3 on the 26th in 1960 62
Mount Walker 47.0 on the 12th 31.2 on the 5th in 1963 55
Tamaru 99.3 on the 13th 94.5 on the 20th in 1991 48


Record highest July daily minimum temperature
Highest daily minimum
temperature
in July 2013 (°C)
Previous warmest
for July
Years of
record
Average for
July
Cape Leeuwin 17.7 on the 1st 16.7 on the 5th in 1913 107 11.3
Manjimup 13.6 on the 15th 13.3 on the 20th in 1959 54 6.4
Albany Airport Comparison 13.6 on the 15th 13.4 on the 1st in 1985 49 7.5
Jarrahwood 15.0 on the 15th 14.0 on the 30th in 2007 31 4.8



Record lowest July temperature
Lowest temperature
in July 2013 (°C)
Previous coolest
for July
Years of
record
Average for
July
Northam -3.2 on the 8th = -3.2 on the 12th in 1997 105 5.4
Kellerberrin -4.5 on the 8th -3.5 on the 12th in 2005 102 5.6
Narrogin -2.7 on the 8th = -2.7 on the 1st in 1920 94 5.2
Salmon Gums Res.Stn. -4.4 on the 8th = -4.4 on the 4th in 1962 76 4.6
Corrigin -4.2 on the 8th -3.8 on the 20th in 1987 66 4.9
Lancelin 1.5 on the 21st = 1.5 on the 25th in 1979 46 9.9
Beverley -3.8 on the 8th -2.6 on the 19th in 2012 44 5.1



Summary statistics for July 2013
Maximum temperatures
for July
(°C)
Minimum temperatures
for July
(°C)
Rainfall
for July
(millimetres)
Mean for
July
2013
Diff
from
average
Highest for
July
2013
Mean for
July
2013
Diff
from
average
Lowest for
July
2013
Total for
July
2013
Average
for
July
Rank of
July
2013
Fraction of
July
average
North Kimberley (district 01)
Doongan 29.9 +0.2 33.0 15th 10.8 0.0 3.1 26th 0 0.4 v low 0%
Kalumburu 32.6 +0.7 34.7 15th 14.4 +0.6 7.9 27th 0.2 0.3 average 67%
Mount Elizabeth 29.0 +0.5 32.2 15th 8.2 +0.1 -0.2 26th 0 3.1 lowest 0%
Troughton Island 29.3 +1.2 31.3 9th 23.4 +1.3 19.6 27th 0 2.7 v low 0%
Truscott 31.0   33.0 29th 19.2   14.3 27th 0 0 v high
Wyndham 32.2 +1.0 35.7 8th 17.5 +0.6 10.7 27th 0 3.1 lowest 0%
Wyndham Aero 32.8 +1.1 35.7 15th 16.7 +1.6 8.5 26th 0.2 3.0 high 7%
East Kimberley (district 02)
Argyle Aerodrome 30.9 +1.3 34.7 15th 16.7 +1.1 10.0 25th 0 1.3 v low 0%
Halls Creek Airport 28.4 +1.2 33.2 15th 14.0 +1.4 6.8 27th 0.2 6.0 average 3%
Kununurra Aero 32.0 +1.5 35.6 15th 14.9 -0.3 6.4 27th 0 1.6 lowest 0%
Warmun 30.6 +1.1 35.0 14th 14.0 +1.4 5.5 27th 0 5.4 lowest 0%
West Kimberley (district 03)
Bidyadanga 30.4 +0.9 33.5 16th 14.4 +0.5 7.2 25th 0.4 8.3 average 5%
Broome Airport 29.2 +0.4 33.2 16th 14.3 +0.6 8.8 26th 0.2 7.1 average 3%
Broome NTC AWS 27.3   31.3 15th 18.9   15.1 26th
Curtin Aero 32.0 +1.1 36.5 14th 15.7 +0.4 9.9 27th 0 7.5 v low 0%
Derby Aero 31.4 +0.8 35.3 15th 14.1 -0.7 6.7 26th 0 7.5 lowest 0%
Fitzroy Crossing Aero 31.4 +0.7 35.8 15th 12.1 0.0 4.8 25th 0 6.3 v low 0%
West Roebuck 30.1 -0.8 34.0 14th 13.6 +1.2 8.2 25th 0 18.2 v low 0%
De Grey (district 04)
Bedout Island 24.4   27.3 16th 19.7   16.5 20th
Karratha Aero 26.1 -0.1 30.3 16th 13.8 +0.1 9.9 18th 0.4 13.9 average 3%
Legendre Island 24.6   28.5 16th 17.7   14.9 21st
Mandora 29.2 +0.3 32.8 15th 12.9 +0.4 6.9 27th 0 8.8 lowest 0%
Marble Bar 27.1 -0.1 31.7 16th 12.2 +0.1 7.4 26th 0 17.8 v low 0%
Pardoo Station 28.1 +0.2 33.4 16th 13.3 +0.4 6.7 26th 0 9.6 lowest 0%
Port Hedland Airport 27.5 +0.4 31.5 16th 13.2 +0.9 8.4 21st 0 11.0 lowest 0%
Roebourne 27.9 +1.1 33.2 16th 14.3 +0.7 10.3 26th 0 13.6 lowest 0%
Fortescue (district 05)
Barrow Island Airport 23.2 -0.5 25.4 16th 17.3 -0.2 13.3 21st 0.2 12.8 low 2%
Learmonth Airport 24.1 -0.1 28.1 16th 11.1 -0.3 5.0 22nd 3.4 22.0 low 15%
Mardie 27.6 -0.1 31.0 24th 13.2 +1.5 8.0 19th
Onslow Airport 26.3 +1.0 29.9 31st 13.7 +0.8 9.3 22nd 0 19.3 lowest 0%
Wittenoom 25.1 +0.9 30.4 16th 12.6 +1.1 6.8 21st 0 13.7 lowest 0%
West Gascoyne (district 06)
Carnarvon Airport 23.2 +0.9 28.6 23rd 9.9 -1.0 4.0 22nd 0.2 44.7 v low 0%
Denham 21.6 -0.1 25.5 23rd 12.0 -0.7 7.5 19th 9.6 39.7 low 24%
Emu Creek Station 25.8 +0.3 30.1 14th 11.3 0.0 7.5 21st 0.1 21.5 low 0%
Murchison 20.9 -0.1 28.0 15th 6.9 +0.8 1.2 21st 17.2 28.5 average 60%
Shark Bay Airport 22.7 0.0 26.0 23rd 10.0 -0.5 4.3 22nd 10.2 28.9 low 35%
East Gascoyne (district 07)
Newman Aero 23.5 +0.5 28.9 16th 8.2 +2.1 3.5 22nd 9.6 14.8 average 65%
Paraburdoo Aero 25.0 +0.2 30.6 14th 11.2 +1.5 6.7 13th 0.2 14.3 low 1%
Murchison (district 07A)
Meekatharra Airport 19.4 +0.4 26.5 25th 7.5 +0.1 2.1 18th 14.2 21.6 average 66%
Mount Magnet Aero 19.6 +0.9 27.9 15th 7.0 0.0 0.3 18th 8.6 31.2 low 28%
North Coast (district 08)
Carnamah 19.0 +1.1 23.3 23rd     3.6 19th 51.5 67.5 average 76%
Dalwallinu 17.5 +0.7 23.2 23rd 5.1 -0.7 0.6 21st 48.2 46.2 average 104%
Eneabba     24.0 23rd 7.6 -1.4 2.5 20th 73.4 93.1 low 79%
Geraldton Airport 20.4   24.6 23rd 7.5   2.3 19th 53.8
Kalbarri 22.5 +0.8 25.2 1st 8.1 -1.6 1.2 19th 27.6 69.8 low 40%
Morawa Airport 19.1 +0.5 24.0 23rd 4.4 -1.7 0.4 19th 29.2 44.3 low 66%
Mullewa 20.3 +1.5 25.0 23rd 7.0 0.0 3.4 19th 22.2 59.6 v low 37%
North Island 21.3 +0.3 24.4 15th 14.1 -1.2 8.8 15th 42.8 73.0 average 59%
Wongan Hills 17.7 +0.7 23.0 23rd 5.5 -1.1 1.1 5th 43.8 69.1 low 63%
Central Coast (district 09)
Badgingarra Research Stn 17.7 +0.1 21.4 23rd 6.2 -1.0 3.2 12th 83.6 104.2 average 80%
Bickley 15.3 +0.2 19.2 23rd 7.0 -0.1 1.7 8th 201.6 217.2 average 93%
Garden Island HSF 17.9 +0.1 21.8 23rd 11.0 0.0 6.5 8th 120.0 114.9 average 104%
Gingin Aero 18.4 +0.1 22.8 23rd 4.8 -1.3 -1.4 8th 137.0 124.4 average 110%
Gosnells City 19.2 +0.6 23.3 1st     3.6 2nd 127.3 161.3 low 79%
Jandakot Aero 18.3 +0.4 22.5 23rd 5.8 -0.9 -1.2 8th 165.2 174.3 average 95%
Karnet 15.6 +0.2 20.1 23rd 5.4 -0.8 0.3 8th 187.4 217.9 average 86%
Lancelin 19.7 +0.5 23.0 23rd 7.9 -2.0 1.5 21st 102.8 120.8 average 85%
Medina Research Centre 18.9 +0.6 22.7 23rd 6.9 -1.3 0.8 18th 113.6 146.8 low 77%
Pearce RAAF 18.8 +1.0 22.2 15th 5.8 -2.6 -0.9 18th 119.5 135.0 average 89%
Perth Airport 18.7 +0.8 23.5 23rd 6.6 -1.4 -0.3 18th 112.0 156.6 low 72%
Perth Metro 18.8 +0.4 23.0 1st 6.9 -0.7 1.4 18th 140.0 146.4 average 96%
Rottnest Island 18.0 +0.3 21.3 23rd 12.6 +0.3 9.2 17th 101.4 113.3 average 89%
Swanbourne 18.9 +0.6 22.4 2nd 8.9 -0.7 4.4 8th 161.0 146.5 average 110%
South Coast (district 09A)
Albany 16.9 +1.2 21.2 14th 9.6 +1.5 5.2 22nd 95.2 143.2 low 66%
Albany Airport 16.5   20.5 14th 7.8   1.9 22nd
Bridgetown 15.7 0.0 19.3 15th 4.7 +0.4 -2.6 8th 129.8 118.9 average 109%
Bunbury 17.4 +0.2 20.4 1st 6.8 -0.2 -1.1 8th 151.2 143.4 average 105%
Busselton Aero 17.2 +0.5 21.3 14th 6.5 -0.2 0.6 7th 127.4 128.8 average 99%
Cape Leeuwin 17.2 +0.8 20.0 14th 12.0 +0.7 7.5 21st 192.2 181.6 average 106%
Cape Naturaliste 17.1 +0.8 21.7 1st 10.7 +0.3 6.2 7th 134.8 160.9 average 84%
Collie East 16.2 0.0 20.4 23rd 3.6 0.0 -3.7 8th 146.8 124.4 average 118%
Donnybrook 17.4 +0.9 21.0 14th 6.2 +0.5 -0.6 8th 183.8 186.2 average 99%
Dwellingup 15.8 +0.8 19.8 23rd 4.7 -0.7 -1.7 8th 223.8 236.8 average 95%
Esperance 17.3 +0.1 22.1 15th 8.6 +0.3 3.6 8th 90.6 96.2 average 94%
Esperance Aero 16.8 +0.5 22.2 15th 7.2 -0.3 3.0 8th 78.2 78.9 average 99%
Harvey 17.3 +0.1 20.0 23rd         209.2 154.1 high 136%
Hopetoun North 18.0 -0.1 24.2 15th 8.6 +0.9 3.4 22nd 81.0 70.4 average 115%
Jarrahwood 16.7 +0.3 20.0 31st 4.2 -0.6 -3.0 7th 147.0 174.1 average 84%
Mandurah 17.5 +0.1 20.0 15th 10.2 -0.4 6.0 21st 137.2 118.7 high 116%
Manjimup 15.0 +0.6 19.2 14th 6.6 +0.2 1.1 7th 129.8 174.1 low 75%
North Walpole 16.0   20.2 14th 9.1   5.4 7th 156.0
Pemberton 15.7 +0.7 21.2 1st 7.5 +0.3 1.6 8th 176.3 209.2 average 84%
Rocky Gully 15.0 +0.3 19.1 14th 6.4 0.0 -0.3 7th
Windy Harbour 17.0 +0.2 20.5 23rd 8.6 0.0 2.2 17th 208.8 191.3 average 109%
Witchcliffe 16.5 +0.1 20.3 1st 7.7 -0.3 0.9 21st 273.0 189.3 high 144%
North Central (district 10)
Bencubbin 17.1 +0.7 22.7 15th 5.4 -0.6 0.0 8th 39.1 45.4 average 86%
Cunderdin Airfield 17.4 +0.4 23.3 23rd 3.1 -1.4 -3.7 8th 42.8 48.5 average 88%
Kellerberrin 17.7 +1.3 22.2 23rd 3.1 -2.5 -4.5 8th 54.5 51.6 average 106%
Merredin 17.3 +1.0 22.5 23rd 4.5 -1.0 0.0 2nd 36.0 50.5 low 71%
Northam 17.9 +1.0 22.7 23rd 3.5 -1.9 -3.2 8th 65.1 82.2 average 79%
York 17.3 +0.3 22.0 23rd 2.4 -1.2 -4.5 5th 81.7 71.1 average 115%
South Central (district 10A)
Beverley 17.7 +0.9 22.2 23rd 3.7 -1.4 -3.8 8th 75.0 77.4 average 97%
Brookton 16.4 +0.3 21.0 23rd 3.3 -1.2 -2.6 8th 106.5 85.6 high 124%
Corrigin 16.3 +1.0 21.2 23rd 4.0 -0.9 -4.2 8th 112.4 59.9 v high 188%
Hyden 16.7 +0.3 22.0 23rd 3.6 -1.0 -4.0 6th 68.8 47.9 high 144%
Jacup 15.9 +0.3 21.7 15th 5.4 -0.1 0.7 7th 27.0 49.6 v low 54%
Katanning 14.9 +0.1 19.0 15th 5.4 -0.5 -2.0 8th 49.2 63.5 low 77%
Lake Grace 15.4 -0.2 20.0 23rd 4.7 -0.5 -2.5 8th 32.8 37.7 average 87%
Narembeen 16.7 +0.2 22.1 23rd 4.7 -0.7 -2.0 6th 80.0 49.9 high 160%
Narrogin 15.4 +0.8 19.5 23rd 4.5 -0.7 -2.7 8th 67.2 86.9 average 77%
Newdegate Research Station 15.3 +0.1 20.2 23rd 3.4 -0.6 -3.8 8th 38.4 47.5 average 81%
Ongerup 15.5 +0.5 20.5 15th 5.6 -0.2 -0.5 7th 35.0 49.5 low 71%
Pingelly 16.1 +0.8 20.6 23rd 4.7 -0.8 -1.1 8th 97.4 81.8 high 119%
Ravensthorpe 16.6 +0.3 21.3 23rd 6.8 +0.1 1.7 8th 79.5 47.3 high 168%
Wagin 15.6 +0.3 20.5 15th 5.1 -0.4 -2.2 8th 48.4 70.7 low 68%
Wandering 15.9 +0.1 20.3 23rd 3.0 -0.8 -4.8 8th 98.6 95.0 average 104%
Eucla (district 11)
Balladonia 17.9 +0.3 22.4 10th 4.5 -0.3 -2.5 8th 31.9 20.6 high 155%
Eucla 19.6 +1.6 26.7 26th 7.7 +0.7 2.1 8th 27.6 25.3 average 109%
Eyre 19.5 +1.3 27.3 16th 5.1 -0.7 -4.1 8th 79.9 34.9 v high 229%
Forrest 19.8 +1.2 25.6 26th 5.3 +0.2 0.2 5th 5.6 16.4 low 34%
Red Rocks Point 19.0   26.6 16th 8.0   4.1 8th 70.2 41.1 v high 171%
South East (district 12)
Bulga Downs 19.5 +0.3 27.2 15th 5.2 +0.3 -1.3 18th 25.4 24.1 average 105%
Kalgoorlie-Boulder Airport 17.7 +1.0 23.5 15th 4.9 -0.1 -2.3 6th 34.4 25.1 high 137%
Laverton Aero 19.0 +0.7 25.5 25th 6.8 +0.9 2.0 5th 9.6 17.4 average 55%
Leinster Aero 18.5 -0.2 25.1 25th 6.8 +0.7 0.9 22nd 28.8 20.0 high 144%
Leonora 18.5 +0.1 25.1 25th 6.3 +0.2 0.9 6th 12.4 18.8 average 66%
Leonora Aero 19.1   25.7 25th 6.0   0.0 22nd 11.6
Munglinup West 16.6 0.0 21.1 15th 6.6 0.0 2.6 8th 61.4 43.8 high 140%
Norseman Aero 16.7 -0.6 22.1 9th 3.7 -0.3 -3.9 8th 55.2 22.5 v high 245%
Salmon Gums Res.Stn. 16.4 +0.3 21.4 15th 4.5 -0.1 -4.4 8th 44.4 37.0 high 120%
Southern Cross Airfield 17.4 +0.8 24.4 15th 2.8 -0.6 -2.9 6th 20.4 33.7 low 61%
Yeelirrie 19.1 -0.2 25.5 25th 3.6 +0.1 -2.7 5th 40.3 17.6 high 229%
North East (district 13)
Giles Meteorological Office 20.7 +0.7 27.3 12th 6.7 -0.1 2.1 20th 2.0 11.5 average 17%
Telfer Aero 25.9 +0.6 31.4 11th 11.2 +0.6 6.5 26th 1.6 12.9 average 12%
Warburton Airfield 20.9 +0.2 26.5 16th 7.0 +1.3 2.0 22nd 17.6 13.0 high 135%
Wiluna 20.4 +1.0 28.9 15th 6.7 +1.3 1.6 18th 11.8 15.1 average 78%

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Western Australia using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.

This statement has been prepared based on information available at 10 am on Thursday 1 August 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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