Sunny weather forecast for one day this weekend in southern Ontario

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Published September 4, 2025 at 10:56 am

As fall quickly approaches, Ontario residents still have a few weekends to enjoy summer weather.

Fall officially begins on Sept. 22, but cooler temperatures, particularly in the evenings, have started.

Those looking forward to more summer weather will see a mixed bag this weekend.

Friday could be a bit warmer with a high of 24 C forecast in Mississauga, Toronto, Brampton, Burlington, and Oakville, according to Environment and Climate Change Canada. Lows of around 9 C are forecast for Friday night.

It will be slightly cooler in Durham Region, Hamilton and Niagara Region with highs around 22 C.

There is a 30 per cent chance of rain on Friday afternoon and strong wind gusts up to 90 km/h are expected in some parts of the province.

Saturday looks to be the best day of the weekend with a high of 21 C forecast and a mix of sun and cloud, according to Environment Canada.

But don’t forget a jacket if you are heading out in the evening, a low of around 10 C is expected.

On Sunday, rain may return with a 60 per cent chance of showers during the day and a 30 per cent chance in the evening. A high of 18 C and a low of 8 C is forecast.

weather weekend ontario sept 5

Lead photo: Pixabay

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