Wednesday, 1 August 2007 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in July 2007

The Third warmest July

For Western Australia as whole, July 2007 was the third warmest July on record in terms of mean maximum temperature and fourth warmest in terms of mean minimum temperature with warm anomalies of 1.67°C and 1.15°C respectively. Most of the state, except parts of the Kimberley, saw above average maximum and minimum temperatures with anomalies exceeding 3°C in some parts.(maxT map & minT map).

Several locations, mainly in the Southwest Land Division(SWLD) recorded their highest July mean maximum temperature, some their highest July mean minimum temperature and some their highest daily maximum temperature for July. For the second year in a row, Kalbarri recorded a maximum temperature of 30°C or greater in July, when such temperatures had not previously been recorded in the SWLD in July.

The statewide spatially averaged monthly rainfall for July was 18.1 mm, which is near the long-term average of 21.9 mm (rainfall map). A series of cold fronts and northwest cloud bands in the second half of the month brought some welcome rainfall to a large area of the SWLD and Gascoyne though 3-month rainfall totals from May to July were still below to very much below average across most of the state( 3-month rainfall map).

Some extremes and records for individual locations in WA are tabulated below.

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Extremes

Hottest day Highest temperature	36.1°C at West Roebuck on the 30th
Warmest days on average Highest mean daily maximum temperature	31.0°C at Curtin Aero
Coolest days on average Lowest mean daily maximum temperature	15.4°C at Rocky Gully
Coldest day Lowest daily maximum temperature	11.8°C at Bridgetown on the 24th
Coldest night Lowest temperature	−5.1°C at Eyre on the 7th & 16th
Coolest nights on average Lowest mean daily minimum temperature	4.6°C at Eyre
Warmest nights on average Highest mean daily minimum temperature	24.4°C at Cocos Island Airport 21.3°C at Troughton Island
Warmest night Highest daily minimum temperature	26.3°C at Cocos Island Airport on the 31st 23.0°C at Troughton Island on the 18th
Wettest overall Highest total rainfall	343.0 mm at Bickley
Wettest day Highest daily rainfall	55.0 mm at Exmouth Town on the 13th
Highest wind gust	117 km/h at Cape Leeuwin on the 2nd

Jump to:��Extremes��Records��Notes��the top

Records

Record highest total July rainfall
	Total rainfall for July 2007 (mm)	Previous highest for July		Years of record	Normal for July
Learmonth Airport	99.0	89.0	in 1984	55	23.8
Pickering Brook	322.2	315.4	in 2000	31	199.8

Record highest July mean daily maximum temperature
	Mean daily maximum temperature for July 2007 (°C)	Previous highest for July		Years of record	Normal for July
Katanning Comparison	16.4	16.2	in 1976	113	14.5
Cape Naturaliste	18.0	17.9	in 2006	103	16.3
Northam	19.1	19.0	in 1977	96	16.8
Norseman	19.5	18.9	in 1994	56	16.7
Ravensthorpe	18.2	18.0	in 1994	45	16.3
Albany Airport	17.1	17.0	in 1976	43	15.8
Esperance	19.0	18.9	in 1994	39	17.1
Hyden	18.9	18.7	in 1977	33	16.3
Kalbarri	24.3	23.9	in 2006	32	21.6

Record highest July temperature
	Highest temperature in July 2007 (°C)		Previous highest for July		Years of record	Normal for July
Geraldton Airport	29.0	on the 18th	28.8	on the 17th in 1976	65	19.5
Carnamah	26.6	on the 18th	25.5	on the 8th in 2006	47	17.8
Badgingarra Research Stn	26.0	on the 18th	25.8	on the 18th in 1976	41	17.6
Northam	25.2	on the 18th	25.0	on the 8th in 2006	41	16.8
Hyden	24.5	on the 18th	24.4	on the 20th in 2002	35	16.3
Eneabba	29.3	on the 18th	28.2	on the 15th in 1977	34	19.5
Goomalling	25.8	on the 18th	24.5	on the 9th in 2006	32	17.0
Kalbarri	30.5	on the 18th	30.0	on the 6th in 2006	32	21.6

Record highest July mean daily minimum temperature
	Mean daily minimum temperature for July 2007 (°C)	Previous highest for July		Years of record	Normal for July
Donnybrook	8.2	8.0	in 1992	104	5.6
Kalgoorlie-Boulder Airport	8.1	7.5	in 1949	67	4.9
Geraldton Airport	12.4	11.9	in 1964	65	9.4
Corrigin	7.3	7.1	in 1949	60	4.9
Meekatharra Airport	10.0	9.9	in 1996	58	7.4
Bencubbin	8.8	8.3	in 1996	57	5.9
Dalwallinu Comparison	8.8	8.2	in 1964	53	6.6
Lake Grace Comparison	7.7	7.0	in 1985	52	5.6
Pearce RAAF	10.6	10.4	in 1996	47	8.5
Ongerup	7.4	7.3	in 1996	40	5.8
Badgingarra Research Stn	9.5	8.8	in 2002	38	7.1
Karnet	8.4	8.2	in 1992	37	6.2
Narembeen	8.6	7.6	in 1973	36	5.3
Pingelly	7.4	7.1	in 1996	36	5.6
Kalbarri	12.4	11.8	in 1996	31	9.7

Notes

This statement has been prepared based on information available at 10 am on Wednesday 1 August 2007. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals 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 30 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of "normal" rain.

Further information