Expect temperatures to plummet as a reserve of exceptionally cold Arctic air begins to move south in the days ahead.

Frigid air will make its first stop on the Prairies on Friday before moving toward Ontario and Quebec into the day Sunday. The cold air may play a crucial role in developing a strong winter storm for Atlantic Canada by Monday.

DON'T MISS: WHAT IS THE POLAR VORTEX? HOW IT’S RESPONSIBLE FOR DANGEROUS COLD

UNUSUALLY COLD TEMPERATURES FOR THIS POINT IN THE SEASON

Extreme cold crossed over from Siberia to the Yukon this week, sending temperatures into rare territory for this early in the year.

[Extreme Cold Summary Territories December 10 2025] Extreme Cold Summary Territories December 10 2025

Braeburn, Yukon, recorded a -53°C reading on Wednesday, which is the coldest it’s

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