Western Australia in June 2013: Wet in the northwest but record dry in the southwest

  • Rainfall: above average for WA; driest on record for the Southwest Land Division
  • Maximum temperature: near average for WA; above average for southwest WA
  • Minimum temperature: above average for WA; near average for southwest WA

Rainfall

June 2013 in WA can be summarised as being unseasonally wet in the north, largely due to heavy rainfall events from a series of cloudbands, and extraordinarily dry in the south, particularly in the Southwest Land Division (SWLD), due to a lack of strong cold frontal activity.

Rainfall was above to very much above average over much of the Kimberley, Pilbara, Northern Interior, central and northeast Gascoyne, northern parts of the Southern Interior, and the far northern Goldfields. Parts of the central and east Pilbara and west Kimberley recorded their wettest June on record, with monthly totals over 200 mm reported. In contrast, below to very much below average rainfall was evident in most of the SWLD, southern Gascoyne, Goldfields, and Eucla. A significant number of sites in the SWLD, particularly in central and northern parts saw their lowest June rainfall on record, with many recording less than 10 mm for the month.

Averaged across the state as a whole, rainfall during June 2013 was above average as a result of the widespread high rainfall totals in the north. For the SWLD, June 2013 was the driest June since comparable records commenced in 1900, while for the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), it was the second driest June on record, and trailed June 2006, the driest June on record, by only a very small margin. The Lower Southwest has now recorded its four lowest June rainfall totals since 1900 in the past 13 years (2006, 2013, 2001, 2010), whilst the SWLD has recorded four of its five lowest June totals in the past 13 years (2013, 2006, 2001, 1976, 2010).

At the start of June 2013, a Northwest Cloudband over northern and central WA produced widespread rain with moderate to heavy falls in the Pilbara, east Gascoyne, northern Goldfields, and west Kimberley. A weak tropical low drifting close to the west Kimberley coast on the 5th and 6th brought thunderstorms and a re-intensification of the cloudband over northern WA with extremely heavy falls reported in the west Kimberley. West Roebuck, near Broome, recorded 202.0 mm in the 24 hours to 9am on the 6th, which was the highest daily total recorded during the event and WA's seventh wettest June day on record. A few other sites in the region registered their highest daily rainfall in June on record on the 6th or 7th, with 146.4 mm at Broome Airport on the 6th exceeding the previous June daily record at the airport of 127.0 mm on 24 June 1968, and also exceeding the highest June daily rainfall at the Broome Post Office of 143.0 mm on 15 June 1901, thus being the wettest June day in the town since recording began in 1889.

A weak cold front moved through the SWLD on the 8th and a low that developed in the wake of the front and moved along the WA south coast on the 9th brought the first widespread rainfall to the SWLD for the month, with moderate falls in southern parts and generally light falls inland. Cold fronts also brought rainfall to the SWLD on the 16th and 17th, and from the 22nd to 25th, but falls were generally modest.

Cloudbands moved through western and central WA from the 11th to 15th and produced moderate to heavy falls mainly in the Gascoyne, whilst another cloudband moved through the northern half of WA from the 17th to 19th bringing moderate rainfall to the Pilbara and Northern Interior. Another cloudband, associated with a tropical low northwest of WA, developed over the northwest on the 23rd and slowly moved eastward dissipating on the 29th over the Kimberley. Widespread rainfall was reported across northern WA as the cloudband moved through, and the Pilbara saw exceptionally heavy rainfall from late on the 23rd to the morning of the 25th. A number of sites in the Pilbara recorded June daily rainfall records in the 24 hours to 9am on the 25th including Roebourne, which recorded 223.6 mm, the highest daily fall in the State in June 2013, the highest June daily fall at the site since records commenced in 1887, and the second highest daily fall at the site for any month, only behind 233.7 mm on 7 March 1945. It was also the third wettest June day on record in WA behind 304.6 mm on 4 June 2002 at Exmouth and 272.2 mm on 11 June 1992 at Urala (Pilbara) .Karratha also recorded its second wettest day on record with 209.4 mm on the 25th, only behind 212.4 mm on 10 January 2006 as tropical cyclone Clare moved past the town.

Maximum temperature

Above to very much above average mean maximum temperatures were observed in most of the Kimberley in June, as well as in parts of the southwest Gascoyne, western parts of the Southwest Land Division, and the Eucla, with areas up to 2 °C warmer than normal in a large part of the Kimberley, and in the southwest Gascoyne and northern Central West. A broad band of below to very much below average mean maximum temperatures was observed over the far west Kimberley, most of the Pilbara, east Gascoyne, western and southern Northern Interior, much of the Southern Interior, and northern Goldfields, roughly corresponding with the path of cloudbands during the month. Telfer in the east Pilbara and Giles in the Southern Interior recorded their lowest June mean maximum temperatures on record as areas of the east Pilbara and western Northern Interior registered mean maxima up to 4 °C below normal.

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

At the start of June 2013, northern and central WA experienced cold days with daily maxima in the low-to-mid teens as a result of a cloudband in the region . Mandora in the west Kimberley recorded a maximum temperature of 16.4 °C, which was its coldest June day in 52 years of record, 2.0 °C lower than the previous record set on 12 June 1998. Large parts of WA recorded unusually high temperatures from the 8th to the 11th as a relatively static pressure pattern brought persistent easterly winds across much of the state. A particularly warm day was reported in the Pilbara on the 10th as daily maxima in the mid-thirties were registered and Onslow Airport recorded a daily maximum temperature of 33.5 °C, its hottest June day in 47 years of record. The deluge in northwest WA on the 24th resulted in the coldest June day on record at Learmonth Airport in the west Pilbara, with a daily maximum temperature of 17.5 °C.

Minimum temperatures

Most of the northern half of the State, as well as eastern and central parts, saw above to very much above average mean minimum temperatures during June 2013, with means up to 4 °C warmer than normal in parts of the Kimberley and Southern Interior. Troughton Island off the north Kimberley coast experienced its warmest June nights in 33 years of record with a mean minimum of 25.6 ºC. Below average mean minimum temperatures were reported in the west Gascoyne, and northern and central parts of the Southwest Land Division, with up to 3 °C cooler than normal mean minima in the Shark Bay region of the Gascoyne.

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

Troughton Island recorded a daily minimum temperature of 27.1 °C on both the 1st and 6th, which equalled the warmest June night on record at the site, also recorded on 2 June 2007, and became the equal second highest June minimum on record in WA, the highest being 27.2 ºC at Cockatoo Island on 1 June 1971. Following a record warm day-time temperature on the 10th, Onslow Airport endured a record warm June night as cloud moved over the area with a daily minimum temperature of 23.3 °C on the 11th. Cloudy conditions also saw a record high overnight temperature at Warmun in the east Kimberley on the 29th with 24.5 °C.

Other Phenomena

On the 9th, a low moving along the WA south coast triggered a line of thunderstorms near Albany. A line of damage approximately 500 metres long and 80 metres wide was reported from Elleker, west of Albany town, and hail the size of olives to golf balls was reported.

Early on the 25th, a tornado reportedly moved through the Port Hedland port and then a construction area, causing some localised damage to vehicles and signs.

Further information

Media
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Extremes in June 2013
Hottest day 36.2 °C at Wyndham Aero on the 2nd
35.6 °C at Wyndham Aero on the 12th
Warmest days on average 33.2 °C at Wyndham Aero
Coolest days on average 16.0 °C at Katanning
Coldest day 11.3 °C at Kalgoorlie-Boulder Airport on the 12th
Coldest night -2.9 °C at Eyre on the 19th
Coolest nights on average 3.3 °C at York
Warmest nights on average 25.6 °C at Troughton Island
21.3 °C at Truscott
Warmest night 27.1 °C at Troughton Island on the 1st & 6th
25.4 °C at Cygnet Bay on the 5th & 26th
Warmest on average overall 27.9 °C at Troughton Island
26.2 °C at Truscott
Wettest day 223.6 mm at Roebourne on the 25th
Highest wind gust 96 km/h at Cape Leeuwin on the 24th

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 June daily rainfall
Highest daily rainfall
in June 2013 (mm)
Previous wettest
for June
Years of
record
Roebourne 223.6 on the 25th 133.9 on the 10th in 1968 108
Karratha Station 180.0 on the 25th 97.2 on the 13th in 1989 96
Bulloo Downs 52.0 on the 25th 51.0 on the 8th in 1993 88
Cape Leveque 137.9 on the 7th 130.6 on the 3rd in 1941 83
Broome Airport 146.4 on the 6th 127.0 on the 24th in 1968 73
Port Hedland Airport 130.0 on the 25th 127.6 on the 5th in 2002 70
Pyramid Station 141.2 on the 25th 113.0 on the 13th in 1989 58
Cygnet Bay 173.0 on the 7th 96.5 on the 20th in 1968 50
Dampier Salt 202.0 on the 26th 75.2 on the 3rd in 1971 44
Country Downs 134.0 on the 6th 44.4 on the 19th in 2005 41
Karratha Aero 209.4 on the 25th 63.0 on the 5th in 2002 41
Paraburdoo Aero 52.4 on the 25th 47.0 on the 12th in 1991 40



Record highest total June rainfall
Total rainfall
for June 2013 (mm)
Previous wettest
for June
Years of
record
Average for
June
Port Hedland Airport 253.4 128.6 in 2002 71 24.0
Cygnet Bay 195.8 138.8 in 1978 50 22.0
Dampier Salt 236.3 202.5 in 1989 44 36.9
Country Downs 197.2 86.0 in 2005 41 15.5
Karratha Aero 271.6 179.3 in 1989 41 35.6
Telfer Aero 101.0 68.2 in 1998 40 14.3



Record lowest total June rainfall
Total rainfall
for June 2013 (mm)
Previous driest
for June
Years of
record
Average for
June
Northam 5.6 9.6 in 2001 133 79.8
Northampton 4.2 8.2 in 2006 132 109.0
Beverley 6.0 6.3 in 2001 128 78.6
Jarrahdale 47.2 55.9 in 1893 128 226.4
Carnamah 2.2 10.0 in 2006 127 75.6
Walebing 7.0 16.6 in 2010 124 89.1
Narrogin 14.6 16.7 in 2001 123 86.3
Cranbrook 6.0 17.5 in 2006 121 71.7
Doongin Peak 2.6 8.0 in 2001 119 55.3
Arthur River 20.8 24.4 in 1893 118 83.3
Mingenew 3.8 15.6 in 2001 117 82.8
Mullewa 2.8 3.0 in 2006 116 64.2
Goomalling 7.3 13.3 in 2001 111 66.8
Westbourne 16.0 24.4 in 2006 111 112.0
Dowerin 4.6 9.2 in 2001 109 61.8
Cowcowing 2.0 9.4 in 1911 107 50.4
Wongan Hills 3.4 17.4 in 1912 107 70.8
Yandanooka 9.4 12.8 in 2001 107 84.1
Ejanding 3.8 9.6 in 2001 106 52.6
Three Springs 4.0 12.0 in 2006 106 74.4
Chidlow 17.8 40.8 in 2010 105 173.1
Kokardine 5.6 12.8 in 2006 105 56.6
Corrigin 3.3 9.2 in 2001 104 60.5
Ogilvie 1.8 6.0 in 2006 103 81.9
Wyalkatchem 6.2 8.2 in 2001 103 54.5
Bullfinch 4.0 5.4 in 2001 102 41.5
Moningarin 4.0 13.9 in 1935 102 55.1
Coorow 0.5 8.2 in 2001 101 73.8
Wattening 7.2 19.0 in 2001 101 78.0
Barberton 9.0 19.0 in 2006 100 85.4
Colorado 8.5 15.4 in 2006 100 66.2
Bruce Rock 4.2 10.4 in 1922 96 51.7
Kondinin 4.2 8.0 in 2001 96 53.4
Midland 31.2 33.4 in 2006 96 161.8
Bolgart 5.0 10.4 in 2001 94 83.0
Perenjori 0.6 6.0 in 2001 94 58.2
Canna 3.6 5.4 in 2006 93 66.4
Hines Hill 5.4 8.0 in 1997 90 43.0
Ygnattering 5.0 11.0 in 2001 86 55.4
Cadoux 4.1 12.6 in 2006 83 59.7
Kondut 5.4 12.2 in 2010 83 58.8
Salmon Gums 5.4 8.9 in 2008 79 39.6
Latham 1.4 4.0 in 2001 78 53.3
Happy Valley 5.4 8.8 in 2001 77 58.3
Wongan Hills Res.Station 4.8 16.7 in 2010 76 61.8
King Rocks 7.8 12.8 in 2010 75 47.1
Bulyee 6.0 8.2 in 2001 74 69.3
Nanyanine 7.3 7.8 in 2001 74 52.9
Eradu 2.8 5.2 in 2006 73 76.7
Bindi Bindi East 4.6 13.2 in 2010 70 67.3
Perth Airport 22.0 27.8 in 2006 70 160.0
Wanneroo 23.0 27.6 in 2006 69 165.1
Coolangatta 4.6 8.0 in 2006 62 64.9
Cranham 15.2 22.4 in 2001 60 75.9
Dandaragan West 17.8 19.6 in 2001 60 118.7
Pearce RAAF 10.2 21.0 in 2001 59 134.2
Amery Acres 2.2 10.0 in 2001 56 64.8
Wandana 3.0 11.6 in 1999 53 57.0
Gidgegannup 16.8 27.2 in 2001 52 175.1
Gosnells City 33.2 42.0 in 2006 51 171.5
Swanara 4.0 8.2 in 2001 51 52.4
Karnet 13.5 22.0 in 1994 48 212.7
Lancelin 14.0 31.0 in 2010 48 121.0
Roleystone 38.0 45.0 in 2001 46 187.6
Bickley 28.8 35.4 in 2001 45 201.7
Mosman Park 20.8 36.8 in 2006 41 140.3
Swan View 22.0 40.6 in 2006 40 143.3
Pickering Brook 18.2 35.8 in 2001 36 175.5
Desert Fringe 11.4 15.7 in 1985 33 32.5
Gibb Rock 3.6 12.8 in 2001 32 39.7
Maida Vale 27.2 45.0 in 2001 32 161.4
Beaumont West 14.2 14.6 in 2000 31 44.7




Record highest June temperature
Highest temperature
in June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Onslow Airport 33.5 on the 10th 33.2 on the 20th in 2010 48 25.9



Record lowest June daily maximum temperature
Lowest daily maximum
temperature
in June 2013 (°C)
Previous coolest
for June
Years of
record
Average for
June
Mandora 16.4 on the 1st 18.4 on the 12th in 1998 52 29.0
Learmonth Airport 17.5 on the 24th 17.9 on the 9th in 2001 39 24.9



Record lowest June mean daily maximum temperature
Mean daily maximum
temperature
for June 2013 (°C)
Previous coolest
for June
Years of
record
Average for
June
Giles Meteorological Office 17.6 18.0 in 1989 56 20.3
Telfer Aero 21.9 22.3 in 1989 39 25.3



Record highest June daily minimum temperature
Highest daily minimum
temperature
in June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Warmun 24.5 on the 29th 24.4 on the 1st in 1998 51 13.6
Onslow Airport 23.3 on the 11th 22.2 on the 4th in 1957 48 14.2



Record highest June mean daily minimum temperature
Mean daily minimum
temperature
for June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Troughton Island 25.6 24.7 in 1973 33 23.2



Summary statistics for June 2013
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2013
Diff
from
average
Highest for
June
2013
Mean for
June
2013
Diff
from
average
Lowest for
June
2013
Total for
June
2013
Average
for
June
Rank of
June
2013
Fraction of
June
average
North Kimberley (district 01)
Doongan 30.0 +1.0 32.0 28th 14.6 +3.3 8.9 19th 0.5 5.4 high 9%
Kalumburu 32.6 +1.4 34.6 13th 17.8 +4.1 10.5 17th 0.4 3.3 high 12%
Mount Elizabeth 29.6 +1.6 31.5 11th 12.8 +4.0 7.6 19th 14.6 12.8 high 114%
Troughton Island 30.2 +1.3 31.1 13th 25.6 +2.4 23.8 21st 0.4 7.3 average 5%
Truscott 31.2   33.6 12th 21.3   17.0 18th 4.4 4.5 high 98%
Wyndham 32.5 +1.5 35.5 2nd 19.4 +1.9 13.3 17th 6.4 3.9 high 164%
Wyndham Aero 33.2 +2.4 36.2 2nd 18.7 +3.5 12.5 18th 3.8 3.8 high 100%
East Kimberley (district 02)
Argyle Aerodrome 31.7 +2.6 39.1 28th 18.7 +3.0 14.2 17th 3.2 4.5 high 71%
Halls Creek Airport 29.0 +1.8 32.3 26th 16.5 +2.9 11.2 21st 2.0 5.4 high 37%
Kununurra Aero 32.4 +2.3 35.4 2nd 17.0 +1.3 10.5 17th 3.4 3.6 high 94%
Warmun 31.2 +1.8 34.5 1st 17.0 +3.4 9.5 18th 2.5 6.2 high 40%
West Kimberley (district 03)
Bidyadanga 28.5 -1.3 33.2 9th 17.9 +2.6 14.8 14th 98.3 20.2 v high 487%
Broome Airport 28.4 -0.7 32.1 11th 18.6 +3.5 15.1 24th 187.2 19.7 v high 950%
Curtin Aero 30.9 +0.3 34.8 3rd 18.9 +2.5 14.6 15th 30.2 9.6 high 315%
Derby Aero 30.1 -0.3 33.3 11th 18.5 +2.9 13.2 24th 55.6 8.5 v high 654%
Fitzroy Crossing Aero 31.0 +0.9 35.0 26th 16.6 +4.1 11.5 14th 35.2 9.7 high 363%
West Roebuck 29.0 -1.5 32.6 11th 17.4 +4.8 11.6 21st 228.6 25.3 v high 904%
De Grey (district 04)
Karratha Aero 25.0 -1.5 31.3 11th 16.4 +1.5 11.7 28th 271.6 35.6 highest 763%
Legendre Island 23.8   28.3 11th 19.0   15.1 19th
Mandora 26.9 -2.1 32.8 9th 16.8 +2.7 11.9 1st 135.6 17.9 v high 758%
Marble Bar 24.1 -2.8 30.4 10th 14.7 +1.7 9.8 21st 202.0 27.9 v high 724%
Pardoo Station 26.1 -2.2 33.0 10th         90.1 27.2 v high 331%
Port Hedland Airport 25.2 -2.4 31.0 9th 16.3 +2.2 12.1 21st 253.4 24.0 highest 1056%
Roebourne 25.5 -1.5 32.0 11th 16.8 +1.5 12.1 19th 275.8 31.1 v high 887%
Fortescue (district 05)
Barrow Island Airport 23.4 -0.8 27.6 11th 19.4 +0.8 15.7 20th 214.6 38.8 v high 553%
Learmonth Airport 23.8 -1.1 31.1 10th 14.1 +1.0 8.1 21st 114.0 42.5 v high 268%
Mardie 26.4 -1.7 33.8 10th 16.0 +2.2 9.2 21st 116.0 37.8 v high 307%
Onslow Airport 25.9 0.0 33.5 10th 15.9 +1.7 11.1 20th 118.4 47.0 high 252%
Wittenoom 22.4 -2.1 29.7 10th 13.8 +1.0 6.5 21st 87.2 28.7 high 304%
West Gascoyne (district 06)
Carnarvon Airport 24.0 +0.6 27.9 10th 11.2 -1.1 7.0 21st 29.4 47.3 low 62%
Denham 22.3 -0.6 27.0 11th         63.2 54.8 average 115%
Emu Creek Station 24.7 -1.3 32.1 10th 14.0 +1.4 8.5 22nd 58.5 37.1 high 158%
Murchison 21.2 -0.7 26.2 9th 7.6 0.0 1.8 22nd 34.0 27.9 average 122%
Shark Bay Airport 23.0 -0.9 27.3 11th 11.5 -0.4 7.0 21st 64.8 45.7 high 142%
East Gascoyne (district 07)
Newman Aero 20.5 -2.6 29.4 10th 10.9 +4.1 2.3 22nd 69.0 15.2 v high 454%
Paraburdoo Aero 22.9 -2.3 31.1 10th 12.9 +1.9 6.6 22nd 78.4 23.6 v high 332%
Murchison (district 07A)
Meekatharra Airport 18.1 -1.6 24.9 9th 8.2 -0.6 3.9 22nd 55.4 30.4 high 182%
Mount Magnet Aero 19.0 -0.8 24.7 8th 7.7 -0.6 3.2 21st 15.8 20.8 average 76%
North Coast (district 08)
Carnamah 19.5 +0.5 22.7 22nd 7.8 -0.9 4.5 16th 2.2 75.6 lowest 3%
Dalwallinu 18.4 -0.2 21.3 9th 5.8 -1.5 2.3 20th 3.0 30.9 v low 10%
Geraldton Airport 21.9   25.3 22nd 8.7   3.9 30th 14.0      
Kalbarri 23.9 +1.1 27.3 11th 9.8 -1.3 2.5 1st 17.8 80.0 v low 22%
Morawa Airport 19.6 -0.4 22.3 8th 6.1 -1.5 2.6 21st 14.8 39.9 low 37%
Mullewa 20.9 +1.0 24.3 23rd 8.4 -0.1 5.6 1st 2.8 64.2 lowest 4%
North Island 22.2 -0.1 26.2 23rd 16.1 -0.6 10.9 9th 43.6 64.2 average 68%
Wongan Hills 18.8 +0.7 21.8 24th 6.1 -1.7 2.5 22nd 3.4 70.8 lowest 5%
Central Coast (district 09)
Badgingarra Research Stn 18.7 0.0 21.6 22nd 7.6 -0.8 4.8 19th 14.4 102.3 v low 14%
Bickley 16.6 +0.6 19.7 29th 8.1 0.0 4.7 1st 28.8 201.7 lowest 14%
Champion Lakes 19.1   22.5 29th 9.1   4.6 1st 30.2
Garden Island HSF 19.0 0.0 21.6 22nd 11.7 -0.4 8.0 16th 48.6 115.7 v low 42%
Gingin Aero 19.7 +0.1 22.7 22nd 6.0 -1.5 0.6 20th 23.6 115.4 v low 20%
Jandakot Aero 19.6 +0.7 22.6 22nd 6.5 -1.0 1.7 20th 51.2 159.5 v low 32%
Karnet 17.1 +0.8 20.5 22nd 6.6 -0.7 2.4 16th 13.5 212.7 lowest 6%
Lancelin 21.3 +1.1 25.0 14th 9.3 -1.5 5.5 1st 14.0 121.0 lowest 12%
Medina Research Centre 19.7 +0.4 23.1 22nd 7.5 -1.6 2.4 16th 50.3 145.2 v low 35%
Pearce RAAF 20.0 +1.2 23.3 22nd 7.5 -1.9 0.6 16th 10.2 134.2 lowest 8%
Perth Airport 19.9 +1.0 22.8 30th 7.8 -1.2 1.5 1st 22.0 160.0 lowest 14%
Perth Metro 19.9 +0.6 23.0 29th 8.0 -0.6 2.6 16th 44.0 129.5 v low 34%
Rottnest Island 19.1 +0.4 21.9 22nd 13.6 +0.3 11.0 1st 33.8 107.0 low 32%
Swanbourne 20.1 +0.8 23.0 22nd 9.8 -0.8 5.5 1st 43.2 126.8 v low 34%
South Coast (district 09A)
Albany 18.0 +1.4 21.1 29th 10.0 +0.9 5.2 16th 63.8 133.2 v low 48%
Albany Airport 17.7   20.8 30th 7.7   1.8 16th 97.6
Bridgetown 16.9 +0.2 19.4 30th 4.9 -0.3 -0.5 12th 64.4 112.5 low 57%
Bunbury 18.9 +0.5 20.9 22nd 7.3 -0.8 1.3 1st 67.6 144.9 low 47%
Busselton Aero 18.2 +0.4 20.0 30th 6.9 -0.7 3.3 16th 69.0 134.5 low 51%
Cape Leeuwin 18.3 +1.0 20.1 30th 12.9 +0.7 8.5 11th 132.0 176.5 low 75%
Cape Naturaliste 18.2 +0.9 21.2 30th 11.8 +0.3 8.1 1st 93.8 165.3 low 57%
Collie East 17.7 +0.5 20.3 30th 4.3 0.0 -1.1 22nd 44.4 121.3 low 37%
Donnybrook 18.5 +1.1 21.5 22nd 6.2 -0.5 1.5 18th 75.1 190.9 v low 39%
Dwellingup 17.2 +1.3 19.5 29th 5.5 -1.0 0.8 16th 77.6 241.3 v low 32%
Esperance 17.6 -0.4 21.5 30th 10.0 +0.9 5.0 22nd 46.0 79.7 low 58%
Esperance Aero 17.3 +0.1 21.6 30th 8.7 +0.3 5.3 22nd 52.0 67.0 average 78%
Harvey 18.6 +0.2 21.0 29th 7.8 -0.5 4.0 1st 64.8 147.3 low 44%
Hopetoun North 18.4 -0.7 22.6 30th 9.0 +0.4 3.3 14th 22.0 47.8 v low 46%
Jarrahwood 18.0 +0.8 20.1 30th 4.4 -0.9 -0.8 11th 118.4 161.3 low 73%
Mandurah 18.8 +0.2 20.8 14th 11.1 -0.5 7.5 1st 37.8 126.1 v low 30%
Manjimup 16.5 +1.2 19.1 22nd 7.3 -0.1 3.7 16th 65.0 164.7 v low 39%
North Walpole 17.2   20.3 29th 9.9   4.9 11th  
Pemberton 17.0 +1.1 19.6 30th 8.6 +0.5 3.6 16th 95.4 191.1 v low 50%
Rocky Gully 16.1 +0.6 19.0 30th 7.6 -0.1 2.5 11th
Windy Harbour 17.8 +0.1 20.1 29th 9.5 +0.1 3.3 12th 133.1 174.8 average 76%
Witchcliffe 17.9 +0.5 19.7 30th 7.9 -0.9 2.4 11th 175.8 175.3 average 100%
North Central (district 10)
Bencubbin 18.2 +0.8 21.3 9th 6.1 -1.2 2.5 20th 12.7 49.2 v low 26%
Cunderdin Airfield 18.5 +0.1 22.0 9th 4.8 -1.2 0.0 28th 3.6 37.7 v low 10%
Kellerberrin 18.1 +0.6 22.0 9th 5.1 -1.7 -0.5 28th 8.5 53.9 v low 16%
Merredin 18.1 +0.8 21.9 9th 5.0 -1.8 0.0 18th 6.6 49.4 v low 13%
Northam 19.0 +1.1 22.4 9th 4.8 -1.7 -1.2 22nd 5.6 79.8 lowest 7%
York 18.7 +0.3 22.0 9th 3.3 -1.5 -2.0 22nd 10.7 62.2 v low 17%
South Central (district 10A)
Beverley 18.6 +0.7 21.8 9th 4.5 -1.5 -0.6 30th 6.0 78.6 lowest 8%
Brookton 17.9 +0.8 21.9 9th 4.4 -1.2 0.0 20th 18.9 86.0 v low 22%
Corrigin 17.6 +1.2 21.4 9th 4.7 -1.2 -0.5 30th 3.3 60.5 lowest 5%
Hyden 18.2 +0.8 22.1 9th 4.4 -1.3 -0.8 28th 11.9 49.3 v low 24%
Jacup 16.7 -0.1 20.4 30th 6.6 +0.1 1.6 13th 19.2 39.5 low 49%
Katanning 16.0 0.0 19.2 29th 6.8 +0.1 2.2 13th 19.4 59.5 v low 33%
Lake Grace 16.6 -0.4 20.2 30th 6.9 +0.6 2.7 30th 9.6 31.3 low 31%
Narembeen 17.9 +0.4 21.3 9th 5.5 -0.9 1.0 27th 13.3 52.1 v low 26%
Narrogin 16.6 +1.2 19.7 30th 5.2 -1.2 0.8 16th 14.6 86.3 lowest 17%
Newdegate Research Station 16.5 -0.1 19.8 30th 4.7 -0.4 -0.7 30th 11.6 49.6 v low 23%
Ongerup 16.4 +0.4 19.6 30th 6.8 +0.1 2.2 13th 39.6 49.2 average 80%
Pingelly 17.2 +0.8 20.6 9th 5.9 -0.7 2.0 1st 20.2 82.0 v low 25%
Ravensthorpe 17.6 +0.4 21.2 30th 8.0 +0.2 2.9 12th 50.6 43.4 high 117%
Wagin 16.6 +0.3 20.0 30th 6.0 -0.2 1.6 13th 15.8 72.6 v low 22%
Wandering 16.9 0.0 20.6 9th 3.9 -0.7 -0.3 1st 23.8 74.5 low 32%
Eucla (district 11)
Balladonia 17.9 -0.1 21.5 9th 6.6 +0.7 0.1 23rd 17.8 26.0 average 68%
Eucla 19.3 +0.6 25.5 10th 9.0 +0.8 4.0 17th 14.0 30.1 low 47%
Eyre 19.2 +0.3 23.7 8th 6.8 0.0 -2.9 19th 26.1 39.8 average 66%
Forrest 19.2 +0.2 25.1 10th 7.4 +1.4 0.9 23rd 3.4 16.3 low 21%
Red Rocks Point 19.2   24.4 9th 9.9   5.6 30th 13.0 35.4 v low 37%
South East (district 12)
Bulga Downs 19.3 -0.5 25.0 9th 5.8 -0.7 0.2 19th 4.2 27.3 low 15%
Kalgoorlie-Boulder Airport 17.3 -0.2 22.0 9th 6.5 +0.3 1.9 18th 10.0 28.2 low 35%
Laverton Aero 17.8 -0.5 23.1 9th 7.0 +0.1 1.7 20th 13.6 15.7 average 87%
Leinster Aero 17.7 -1.5 23.7 9th 7.1 -0.2 1.9 21st 12.8 16.2 average 79%
Leonora 17.5 -1.5 22.7 9th 7.0 -0.4 1.7 21st 8.3 25.0 low 33%
Leonora Aero 18.3   23.5 9th 6.7   0.5 21st 7.0
Munglinup West 16.9 -0.6 20.7 30th 7.7 0.0 4.2 22nd 32.6 36.2 average 90%
Norseman Aero 16.9 -1.1 21.3 9th 4.5 -0.2 -0.3 29th 18.4 15.6 high 118%
Salmon Gums Res.Stn. 16.8 -0.1 20.8 30th 5.2 -0.5 -0.8 14th 18.4 38.0 low 48%
Southern Cross Airfield 17.5 -0.4 21.8 8th 3.8 -0.8 -1.0 18th 5.8 27.3 v low 21%
Yeelirrie 18.1 -1.4 25.0 9th         23.0 23.1 average 100%
North East (district 13)
Giles Meteorological Office 17.6 -2.7 25.4 10th 9.1 +1.1 3.6 12th 41.6 17.7 high 235%
Telfer Aero 21.9 -3.4 29.2 10th 13.3 +1.4 8.4 22nd 101.0 14.3 highest 706%
Warburton Airfield 18.3 -2.4 27.1 10th 9.2 +2.8 3.1 23rd 36.2 17.9 high 202%
Wiluna 18.0 -1.9 24.5 9th 7.8 +1.1 2.1 17th 53.0 24.0 high 221%
Offshore Islands (district 200)
Christmas Island Aero 26.7 -0.3 28.7 22nd 23.5 +0.3 22.1 18th        
Cocos Island Airport 28.5 0.0 29.7 13th 24.6 +0.1 23.1 7th 125.8 211.0 low 60%
Varanus Island 23.9 -0.9 28.8 11th 20.3 -0.5 17.0 3rd 171.2 27.7 v high 618%

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 12 pm on Monday 1 July 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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