Monday, 3 August 2009 - Monthly Climate Summary for Western Australia - Product code IDCKGC21R0
Western Australia in July 2009
Warmer than normal in the northern half of WA
Summary
- Near average rainfall for WA.
- Mean maximum temperature near average for WA, above average in the northern half.
- Above average mean minimum temperature for WA.
An archive of previous monthly summaries for Western Australia is also available, as are summaries for other states and many other climate summaries and diagnostics.
Jump to: Extremes Records Notes the top
Details
Rainfall
July rainfall was near average over much of WA, including a large part of the Southwest Land Division(SWLD). Parts of the southern Gascoyne, Goldfields and Eucla received above to very much above average rainfall, which contrasted with patches of below to very much below average rainfall in the South Coastal and Southeast Coastal districts (see July rainfall decile map). Averaged across the state, July rainfall was near average.
Maximum temperature
July 2009 mean maximum temperature was above to very much above average across the Kimberley, a large part of the Pilbara and Interior, as well as the northern Gascoyne, with up to 2°C warmer than mean maximum temperatures in the western Kimberley and northern Pilbara (see July maximum temperature anomaly map). Fitzroy Crossing Aero and Wyndham Aero in the Kimberley recorded a maximum temperature of 37.3°C on the 24th and 26th respectively, which was their highest July temperature on record and the equal second highest July temperature on record for Western Australia and Australia.
With the exception of below average mean maximum temperatures in the area extending from the southern Gascoyne, northern Central West, northern Central Wheatbelt and southern Goldfields, the remainder of the state was near average. Averaged across the state, the monthly mean maximum temperature was near average.
Minimum temperature
Monthly mean minimum temperature was above to very much above average in a large area from the southern Kimberly, Pilbara, Gascoyne and Interior, to the eastern Eucla, southern Goldfields, South Coastal and Southeast Coastal districts, with up to 3 ºC above mean minimum temperatures in the northern Interior and inland Pilbara (see July minimum temperature anomaly map). The remainder of the state was near average. Averaged across the state as a whole, the WA mean minimum temperature was above average .
Extremes
| Hottest day Highest temperature |
37.3°C at Fitzroy Crossing Aero on the 24th 37.3°C at Wyndham Aero on the 26th |
|---|---|
| Warmest days on average Highest mean daily maximum temperature |
33.2°C at Kalumburu |
| Coolest days on average Lowest mean daily maximum temperature |
13.9°C at Katanning |
| Coldest day Lowest daily maximum temperature |
9.7°C at Narrogin on the 20th |
| Coldest night Lowest temperature |
−3.5°C at Southern Cross Airfield on the 27th |
| Coolest nights on average Lowest mean daily minimum temperature |
3.6°C at Southern Cross Airfield |
| Warmest nights on average Highest mean daily minimum temperature |
23.5°C at Troughton Island 19.4°C at Kuri Bay (mainland) |
| Warmest night Highest daily minimum temperature |
26.0°C at Troughton Island on the 2nd 23.8°C at Truscott (mainland) on the 2nd |
| Wettest overall Highest total rainfall |
249.7 mm at Walpole |
| Wettest day Highest daily rainfall |
68.0 mm at Cowaramup on the 19th |
| Highest wind gust |
113 km/h at Cape Leeuwin on the 20th |
Jump to: Extremes Records Notes the top
Records
| Record highest July daily rainfall | ||||||
|---|---|---|---|---|---|---|
| Highest daily rainfall in July 2009 (mm) |
Previous highest for July |
Years of record |
||||
| Manjimup | 58.0 | on the 19th | 49.8 | on the 19th in 1961 | 94 | |
| Paynes Find | 29.0 | on the 10th | 28.2 | on the 28th in 2008 | 48 | |
| Record highest July temperature | ||||||
|---|---|---|---|---|---|---|
| Highest temperature in July 2009 (°C) |
Previous highest for July |
Years of record |
Average for July |
|||
| Roebourne | 33.9 | on the 7th | 33.8 | on the 24th in 2002 | 52 | 26.7 |
| Kuri Bay | 36.8 | on the 2nd | 36.3 | on the 3rd in 1981 | 40 | 31.1 |
| Telfer Aero | 33.4 | on the 24th | 32.8 | on the 27th in 1974 | 36 | 25.3 |
| Troughton Island | 31.8 | on the 2nd | 31.5 | on the 21st in 1998 | 30 | 28.1 |
| Fitzroy Crossing Aero | 37.3 | on the 24th | 37.0 | on the 25th in 1998 | 12 | 30.8 |
| Wyndham Aero | 37.3 | on the 26th | 36.0 | on the 28th in 2002 | 9 | 31.6 |
| Record highest July daily minimum temperature | ||||||
|---|---|---|---|---|---|---|
| Highest daily minimum temperature in July 2009 (°C) |
Previous highest for July |
Years of record |
Average for July |
|||
| Troughton Island | 26.0 | on the 2nd | 25.7 | on the 29th in 1958 | 30 | 22.0 |
Jump to: Extremes Records Notes the top
Notes
This statement has been prepared based on information available at 9 am on Monday 3 August 2009. 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 generally
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 long-term average rain.
Further information
Yanhui Blockley or Patrick Ward
Western Australia Climate Services Centre
Bureau of Meteorology
Phone (08) 9263 2222
Email climate.wa@bom.gov.au