Canada's new fall forecast says there will be an 'abrupt transition' to early winter weather

This new fall forecast has called for an "abrupt transition" to early winter for most of the country.

So, here's what you need to know about Canada's weather during the fall season, including when it'll get cold.

The Weather Network just put out a 2025 fall forecast with details about the "turbulent and changeable" autumn season.

An extended stretch of more consistent mild weather is expected for most of Canada from mid-September to October.

But those relatively mild conditions won't last for the entire season.

The Weather Network said a more active and changeable pattern is forecast for November.

That means an "abrupt transition into early winter" in many parts of the country.

Western Canada is expected to get the first blast of early winter weather.

Then, the relatively mild pattern across eastern parts of Canada will shift to a colder pattern before the end of November.

B.C.'s weather is expected to feature near seasonal temperatures for much of October and November.

There is the potential for "excessive" rain, especially for the south coast.

Near seasonal temperatures and an active pattern during late fall should allow B.C.'s ski season to start on schedule.

In Alberta, warmer-than-normal temperatures are expected in October. There will be some interruptions with shots of colder weather, though.

The Weather Network said a much colder and more active pattern will develop in November, causing "a strong start to winter" across the province.

In Saskatchewan and Manitoba, warmer-than-normal temperatures are forecast along with a few shots of cooler weather.

The weather is expected to flip late in the season with a much colder and more active pattern in November.

That will lead to an "abrupt transition" to early winter and then "a strong start" to the winter season.

Before the end of the fall season, snow and ice are expected in Saskatchewan and Manitoba.

Ontario's weather is set to feature warmer-than-normal temperatures and fewer fall storms through October.

But then a more active pattern is expected to develop in November.

The Weather Network said relatively mild temperatures are forecast into November, but there is the potential for a more abrupt arrival of early winter.

In Quebec, warmer-than-normal temperatures are expected from mid-September through October.

A more active pattern is forecast after that, and mild temperatures will persist well into November.

There is the potential for a more abrupt transition to early winter weather across the province, though.

In New Brunswick, P.E.I. and Nova Scotia, a milder season and some "chilly interruptions" are expected in October.

The Weather Network said there will be a more typical late fall pattern in November with a transition into early winter.

In Newfoundland and Labrador, above normal temperatures are forecast along with a few shots of chilly weather.

Those milder conditions should shift to more typical late fall weather near the end of the season.

If you want to know more about the autumn season in Canada this year, the Old Farmer's Almanac and Farmers' Almanac have also put out fall forecasts.

The forecasts revealed when you'll get "early snow" and chilly temperatures.

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This article's cover image was used for illustrative purposes only.