Product Code: IDCKGC51R0

Wednesday 3 January, 2007

Annual Western Australia Climate Summary 2006
A year of extremes

In Brief

Western Australia's annual mean maximum temperature for 2006 was slightly above the standard 1961−90 average (0.2°C anomaly averaged across WA), while the annual mean minimum temperature was near average (−0.01°C anomaly). An active tropical cyclone season resulted in cooler daytime temperatures through the state early in the year with January being WA's 2nd coolest January on record However, daytime temperatures became warmer than average from May and this pattern persisted for the remainder of the year with August 2006 easily the warmest August on record for WA , and November also a record high. The August to December period across WA was significantly hotter than any such period since 1950.

The average annual rainfall total, for Western Australia as a whole, was 485 mm, which is the 8th wettest year since 1900. The above average statewide annual rainfall was the result of an exceptionally wet year across the north Kimberley, Pilbara, inland Gascoyne and Interior districts, however this masked the well below average totals near the west coast and southwest corner of WA. Areas near Geraldton, the Perth Metropolitan area and between Bunbury and Cape Naturaliste experienced their driest year on record.

Extremes

Hottest day
Highest temperature
48.2°C at Onslow Airport on 20 Jan
Warmest days on average
Highest mean daily maximum temperature
35.4°C at Fitzroy Crossing Aero
Coolest days on average
Lowest mean daily maximum temperature
19.6°C at Albany
Coldest day
Lowest daily maximum temperature
8.5°C at Carnegie on 12 Jul
Coldest night
Lowest temperature
−6.0°C at Collie East on 17 Jun
Coolest nights on average
Lowest mean daily minimum temperature
7.7°C at Collie East
Warmest nights on average
Highest mean daily minimum temperature
25.0°C at Troughton Island
Warmest night
Highest daily minimum temperature
32.7°C at Meekatharra Airport on 20 Jan
Wettest overall
Highest total rainfall
2081.2 mm at Kuri Bay
Driest overall
Lowest total rainfall
57.2 mm at Useless Loop
Wettest day
Highest daily rainfall
252.4 mm at Wyndham on 25 Mar

Records

Record highest total annual rainfall
Location Total rainfall
for 2006 (mm)
Previous annual
highest
Normal
annual
Years of
record
Eucla439.8433.9in 1992269.9109
Wyndham1509.01429.1in 2000780.036


Record lowest total annual rainfall
Location Total rainfall
for 2006 (mm)
Previous annual
lowest
Normal
annual
Years of
record
Greenbushes599.8610.4in 1969937.2113
Donnybrook618.7650.8in 1940981.9104
Serpentine500.4504.0in 1914940.280
Geraldton Airport197.4225.9in 1948449.462
Perth Airport479.6523.8in 1969781.962
Perth Metro466.8508.7in 1940859131
Windrush465.6485.2in 1969669.344
Lancelin428.0443.3in 1977613.341
Gosnells City553.2558.4in 1969840.438
Karnet858.7922.6in 19691200.736
Kalbarri143.2224.3in 1977359.834
Jarrahwood661.9698.0in 2001941.731


Record highest annual mean daily maximum temperature
Location Mean daily maximum
temperature
for 2006 (°C)
Previous annual
highest
Normal
annual
Years of
record
Norseman26.025.8in 199424.550


Record lowest annual mean daily minimum temperature
Location Mean daily minimum
temperature
for 2006 (°C)
Previous annual
lowest
Normal
annual
Years of
record
Eyre9.810.1in 200310.945

Notes

This statement has been prepared based on information available at 9 am on Wednesday 3 January, 2007. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals are 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.

Further information

Glenn Cook or Yanhui Blockley
Western Australia Climate Services Centre
Bureau of Meteorology
Phone (08) 9263 2222
Email climate.wa@bom.gov.au