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Summary

Canada's September forecast looks promising with late-summer vibes and sunny days

It's time for your sweater and shorts era. 😁

Toronto in the fall time. Right: Quebec in September.

Toronto in the fall time. Right: Quebec in September.

Contributing Writer

Canada's weather forecast for September is shaping up to be a real mix of seasons, with warm late-summer days lingering longer than usual.

According to the latest update from The Weather Network, Canada's September forecast suggests that while autumn lovers might be eager for that crisp fall air, summer isn't quite ready to say goodbye. Depending on where you are in the country, you can expect a blend of summer warmth and the first hints of fall.

Western Canada: Summer heat hangs on

If you're out west, especially in B.C. and the western Prairies, don't pack away those summer clothes just yet. The first half of September will feel a lot like midsummer, with warm—and sometimes even hot—days on the horizon.

Expect temperatures to soar, particularly in Alberta and Saskatchewan, where it might just hit 30 C. But, as the month progresses, things will start to cool down, especially in B.C., so enjoy those warm days while they last!

Central Canada: A tale of two seasons

In Ontario and Quebec, September is bringing a bit of everything. Early on, you'll see a mix of warm days that remind you of summer, but don't get too comfortable—cooler fall weather is waiting in the wings.

As the month goes on, expect more of that crisp fall air, especially as we move into late September. Ottawa and Montreal will be riding the line between seasonable and above-seasonal temperatures, so keep an eye on the forecast for those sneaky cool days.

Atlantic Canada: Warmth and wetness

If you're on the East Coast, September is going to be a mixed bag. While you'll start with some warmer days, there's also a good chance of rain, especially as tropical storms could shake things up later in the month.

The good news? The warmth will likely stick around through mid-September, giving you a few more beach days before fall officially sets in. Newfoundland might even luck out with mostly dry and warm weather, so fingers crossed!

Prairies: A temperature rollercoaster

The Prairies are in for some weather whiplash. After a cooler start, the first half of September will see a return to warmer, summer-like conditions. But don’t be surprised if things take a turn by mid-month, with cooler temperatures making their way in. Southern Alberta could also see some unsettled weather later in the month, so keep that in mind when planning those last summer barbecues.

Overall: Warm with a side of change

Across the country, most regions will see warmer-than-normal or near-normal temperatures by the end of September. But remember, this is a month of change.

As we inch closer to October, the warm days will gradually give way to that familiar fall chill, especially in eastern and central Canada. Precipitation will be near normal or below average for most of the country, but the tropics could throw a curveball, particularly for southern Ontario and the Maritimes.

Wherever you are in Canada this September, get ready for a little bit of everything. Whether you're soaking up the last of the summer sun or embracing the early signs of fall, be sure to stay updated on the forecast and plan accordingly.

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AI tools may have been used to support the creation or distribution of this content; however, it has been carefully edited and fact-checked by a member of Narcity's Editorial team. For more information on our use of AI, please visit our Editorial Standards page.

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    • Contributing Writer

      Patrick John Gilson (he/him) is a Contributing Writer with Narcity Media. He is a pro at ensuring his content is both exciting and tailored to millennials. He specializes in breaking news and investigative stories that require him to be on scene— something he enjoys and thrives in.

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