Monday, 4 September 2023 - Seasonal Climate Summary for Western Australia - Product code IDCKGC21R0

Western Australia in winter 2023

Rainfall

• Winter rainfall was mixed. The western WA recorded below average winter rainfall, with very much below average falls (the lowest 10% of all observations) in the northern and along the west coast of the South West Land Division (SWLD), as well as most of the Gascoyne district.
• The Kimberley and Northern Interior districts recorded above to very much above average winter rainfall. Parts of the South Coastal and South East Coastal districts also recorded above average rainfall.
• A number of sites in the Kimberley had their wettest winter rainfall on record, or wettest winter for at least 20 year.
• For WA as whole, winter rainfall was about 52.8 mm, 16% below the 1961-1990 average.
• For the South West Land Division (SWLD) as whole, winter rainfall was about 158.9 mm, about 22% below the 1961-1990 average.
• A number of cold fronts brought widespread moderate falls in the southwest WA in early June and early August, while a cloudband brought some moderate falls in the Kimberley from 26 June to 1 July. Some sites had their winter daily rainfall records. broken.
• Esperance and the surrounding had their wettest winter rainfall on record, or wettest winter for at least 20 years.

Temperature

• Mean maximum temperatures were above average for most of the state, whilst mean maxima were close to average in the far southwest, and along the South East Coastal district.
• For WA as a whole, the winter mean maximum temperature was 1.43 °C above the 1961-1990 average, the sixth-highest mean maximum temperature on record.
• Mean minimum temperatures were above average in the eastern half of the state, whilst mean minima were close to average or below average in the western half of the state and western Eucla district.
• For WA as a whole, the winter mean minimum temperature was 0.35 °C above the 1961-1990 average.
• Maximum temperatures climbed to the low-to-mid 30s in the southern WA in the last week of August, and multiple winter temperatures records were broken.
• A very cold day with maximum temperatures capping at 10 °C or lower in the southwest WA on 6 June, including a number of lowest winter maximum temperature on record.

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

Maps
	Observed	Anomaly	Decile rank
Total rainfall
Mean daily maximum temperatures
Mean daily minimum temperatures

Click on a map to show it full size in a pop-up window

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top