Sydney, Melbourne, Brisbane, Perth weather: Temperatures set to break records in major city

Perth is facing what could be its hottest September day in almost 150 years.

The forecast predicts that temperatures in Perth on Wednesday could reach a maximum of 34C, which is significantly higher than the city’s usual September average of 21.6C.

 If this prediction holds true, it could mark the highest temperature ever recorded for September in Perth, surpassing the previous record of 34.2°C set in 2014. 

Weatherzone meteorologist Aline Ribeiro suggests that a trough might lead to this record-breaking temperature today. 

‘There’s a trough bringing a hot air mass from the Pilbara region and delaying the sea breeze (which would cool temperatures),’ she told Daily Mail Australia.

‘There’s a chance of really hot temperatures in Perth today – it will be the hottest day for the fortnight.

‘It’s definitely well above the month’s average – it will be really hot.’

However, the swelter won’t last too long.

‘Tomorrow will be hot as well before a cool change moves in on Friday,’ Ms Ribeiro said.

That change is forecast to bring temperatures back down around the low 20Cs.

But as the west coast cools, the east coast is set to heat up.

Showers hanging around Sydney on Wednesday and Thursday are expected to clear on Friday as temperatures warm.

A maximum of 28C and 27C are forecast for Friday and Saturday ahead of a 34C high on Sunday.

Melbourne will also see a warm weekend with maximum temperatures jumping from 17C and 21C on Wednesday and Thursday to 25C and 28C on Friday and Saturday.

The high end-of-week temperatures are forecast to couple with sunny conditions.

Wednesday is looking to be the hottest day for Brisbane this week with a maximum of 31C.

Those temperatures are set to fall as rainy and cloudy conditions move over the city from Thursday.

Hobart is also forecast to see cloudy weather from Wednesday with high temperatures hanging around the high teens to mid 20Cs.

A trough is forecast to drive a hot air mass from the Pilbara region while stunting sea breeze

Clouds over Adelaide will clear from Wednesday for a mostly sunny Thursday and clear skies on Friday.

Temperatures in the South Australian capital are set to peak on Saturday with a high of 30C.

The weather in Darwin is set to be hot, dry and sunny with clear skies and temperatures around the mid 30Cs forecast into next week.