Bundle up: Canada records first -10°C temperature of the season

Canada hits first -10°C of the season, but warmer-than-normal conditions expected ahead

Just one week into meteorological fall, and Canada's first -10°C of the season has been reached.

On Monday, September 8, a temperature of -10.3°C was recorded in Isachsen, Nunavut, marking Canada’s first plunge to this figure in early September.

Northern Nunavut historically experiences these temperatures around this time as daylight diminishes and polar air begins its seasonal expansion.

Baron - Canadas first -10 temperature of the season - Sept 8 2025

Canada’s far north remains most likely to see additional -10°C readings next week, a trend that typically continues into fall and winter.

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These cold conditions generally do not affect southern Canadian cities until mid- to late fall, often in October or November.

Baron - Temperature pattern Sept 16

Looking ahead to mid-September, the long-range weather patterns suggest seasonal to warmer-than-normal conditions for most of Canada.

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In contrast, eastern regions, including Labrador and parts of Atlantic Canada, may see cooler air.

Baron - Temperature pattern next 7-10 days

However, it is unlikely to approach the extreme of -10°C in the immediate forecast.

Stay tuned to The Weather Network for the latest updates as the season progresses, and for the official Fall Forecast release on Wednesday, September 10.

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