Monday 4th August 2008 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in July 2008
A close to average July

Summary

  • Above average maximum temperature.
  • Near average minimum temperature.
  • Near average rainfall.

Details

Rainfall

Above average rainfall was experienced in southwestern parts of the state, while rainfall was below average through central parts (see July rainfall decile map), thus over the whole state rainfall was close to the long term mean. Most northern parts of Western Australia received little or no rain, which is not unusual for this time of year.

The wettest place overall was Bickley with 347.0 mm, which also recorded the most rainfall for a single day, 79.0 mm on the 30th.

Temperature

Most of Western Australia experienced above average daytime maximum temperatues during July, with the exception of parts of the Kimberley and southern parts of the Southwest Land Division (see July maximum temperature anomaly map). Averaged statewide, July 2008 was above average by 1.09°C, continuing the trend in recent years.

Averaged over the whole state, minimum temperatures were close to the long term mean. The Kimberley however, experienced a cooler July, with minimum temperatures up 4°C below normal (July minimum temperature anomaly map).

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



Extremes

Hottest day
Highest temperature
35.8 °C at Wyndham Aero on the 31st
Warmest days on average
Highest mean daily maximum temperature
31.9 °C at Wyndham Aero
Coolest days on average
Lowest mean daily maximum temperature
13.5 °C at Rocky Gully
Coldest day
Lowest daily maximum temperature
9.7 °C at Shannon on the 30th
Coldest night
Lowest temperature
-3.6 °C at Yeelirrie on the 7th and 15th
Coolest nights on average
Lowest mean daily minimum temperature
2.9 °C at Yeelirrie
Warmest nights on average
Highest mean daily minimum temperature
21.6 °C at Troughton Island
Warmest night
Highest daily minimum temperature
23.9 at Troughton Island on the 8th
Wettest overall
Highest total rainfall
347.0 mm at Bickley
Wettest day
Highest daily rainfall
79.0 mm at Bickley on the 30th
Highest wind gust
120 km/h at Rottnest Island on the 18th


Records




Record highest July daily rainfall
Highest daily rainfall
in July 2008 (mm)
Previous highest
for July
Years of
record
Paynes Find 28.2 on the 28th =28.2 on the 26th in 1985 47



Record highest total July rainfall
Total rainfall
for July 2008 (mm)
Previous highest
for July
Years of
record
Normal for
July
Lancelin 241.4 203.5 in 1973 43 127.7



Highest total July rainfall for at least 30 years
Total rainfall
for July 2008 (mm)
Most recent higher
for July
Years since
higher
Normal for
July
Lake Grace Comparison 80.6 105.8 in 1960 48 48.3
Amrista Park 107.6 115.0 in 1964 44 52.7
Belka 85.2 107.3 in 1964 44 52.3
Holt Rock 70.4 82.3 in 1964 44 43.5
Kulin 92.4 114.3 in 1964 44 54.8
Newdegate Research Station 92.6 97.4 in 1964 44 49.2



Record highest July temperature
Highest temperature
in July 2008 (°C)
Previous highest
for July
Years of
record
Normal for
July
Giles Meteorological Office 30.8 on the 30th 30.2 on the 29th in 1975 52 20.0
Wiluna 29.0 on the 28th =29.0 on the 24th in 2002 50 19.4



Record lowest July temperature
Lowest temperature
in July 2008 (°C)
Previous lowest
for July
Years of
record
Normal for
July
             
Wyndham 9.0 on the 11th 9.4 on the 6th in 1984 41 16.9



Lowest July mean daily minimum temperature for at least 30 years
Mean daily minimum
temperature
for July 2008 (°C)
Most recent lower
for July
Years since
lower
Normal for
July
Manjimup 5.7 5.7 in 1965 40 6.4



Notes

This statement has been prepared based on information available at 2pm on Monday 4 August 2008. 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

Patrick Ward
Western Australian Climate Services Centre
Bureau of Meteorology
Phone (08) 9263 2222
Email climate.wa@bom.gov.au