It was a weekend for umbrellas in Perth as the city and south-west parts of the state copped another dose of wet weather.

A complex storm front which moved in over south-west WA on Saturday evening made its presence felt well into Sunday, amid predictions it could bring up to 50 millimetres of rainfall, possible thunderstorms and gusty winds reaching 90 kilometres per hour.

By 3:30pm on Sunday, Perth had recorded 24.4mm of rain, while Bickley in the Perth Hills received 40.8mm.

Dwellingup south of Perth copped 69.2mm while Collie in the South West region had 43.2mm.

Bureau of Meteorology (BOM) senior forecaster James Ashley had predicted the storm front could see Perth reach the halfway mark of its average June rainfall figure (173 millimetres) by the end of the weekend.

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"We're going to have a pretty rainy period Saturday night until about lunchtime on Sunday," he said.

"About 1:00pm, the wet weather will pass and it will clear up.

"But between 7:00pm [Saturday] and 1:00pm [Sunday], the Perth area is likely to see falls of 20 to 50 millimetres or more with the passage of that system.

"I'd expect coastal parts of the metropolitan area will see winds of up to 80km an hour easing as they get further inland."

Storm front caps cold, wet, windy week

Winter hit Perth with a shock on Friday after temperatures dipped to 4.7 degrees Celsius, making it the coldest day of the year so far.

A day earlier, Perth recorded a maximum of just 14.1C, which made it the coldest day since June 23, 2009.

It came after a powerful cold front brought damaging northerly gusts and heavy rainfall to southern WA earlier in the week, blacking out thousands of homes and washing yachts ashore.

Mr Ashley said while the rain from the latest storm front would be heavy at times, it would not be enough to cause significant flooding.

"There's no warning out for this system for heavy rainfall or for damaging winds," he said.

"Gusty winds, heavy rainfall is the order of the day for the next 12 to 18 hours [until Sunday afternoon].

"But this is a fairly normal wintertime front producing heavy falls in the lower-west and south-west of the state, easing off as they head further inland into the Wheatbelt."

Perth's weather is set to clear up after Sunday, with no heavy showers forecast for the next week and drier conditions expected towards next weekend.

Perth weather forecast