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Perth approaching winter rainfall streak not seen in 3 decades

For the first time since 1996, Perth is facing the strong likelihood of rainfall totals that exceed the long-term average in each of the three months of winter.

While Perth topped its total winter rainfall average (three months combined) as recently as last year, rainfall in June 2024 was slightly below average.

But this year, each individual winter month is set to surpass the long-term average (based on data at the current site, which has been operational since 1993).

So far this winter, Perth has received:

• 129.8mm in June. The long-term average is 127.2mm.
• 174.4mm in July. The long-term average is 147mm.
• 88.8mm and counting in August. The long-term average is 122.7mm.

Image: Temperature, chance of rain, and rain amount (new app feature) for Perth, WA, on the Weatherzone app. 

With at least two bursts of showery weather due in the coming week, there’s every chance that Perth will receive the 34mm of rainfall it needs to exceed the August average by this time next week. 

Even if totals fall slightly short of the mark after the coming systems, there will still be at least 10 days of August remaining – Perth’s third wettest month on average – meaning more rain-bearing systems are likely before the end of the month.

Image: Three-hour combined radar and satellite loop showing cloud streaming towards the west coast.

The image above shows the rainband associated with a cold front approaching southwest WA this Wednesday morning. By Wednesday evening, areas of rain should begin to dampen the southwest, with showers continuing into Thursday.

A brief period of cool, mostly dry weather should then set in from Friday before a weak trough forms off the WA coast on Sunday, providing the potential for Perth showers on Sunday afternoon and evening. Another soggy system then arrives next week, most likely on Tuesday.

Meanwhile Perth is currently basking in a mild winter spell by local standards. Tuesday’s maximum was 24.1°C – the warmest day of winter 2025 to date – while a 24-degree day is also on the cards this Wednesday. The mercury had already reached 21°C just after 9am (AWST).

READ MORE: Perth's wettest day in over a year (July 28, 2025)