Canada is expected to see an early and sharp onset of winter this year, with frigid Arctic air pushing temperatures below seasonal averages, according to the Weather Network’s seasonal forecast. The outlook, covering December through February, also predicts near or above normal snowfall and precipitation across much of the country.

Meteorologist Doug Gillham said there is still some uncertainty about whether the coldest periods will affect the entire country or remain concentrated in Western Canada. Regardless, he called it a “December to remember,” noting that the forecast does not point to a historically severe winter, but one with colder December and January conditions than recent years.

“Winter will show up this year, and it’s going to make its presence felt from the start,” Gillham said. He added that the contrast with the record-warm winter experienced two years ago highlights the seasonal variability Canadians are likely to feel this year.

One key factor behind the early chill is the polar vortex, a mass of strong winds circulating high above the Arctic that typically keeps frigid air near the poles. Warmer temperatures in that region are expected to disrupt the vortex, sending colder air southward across Canada in December and January.

The Weather Network forecast suggests that Canadians should prepare for a winter more in line with recent patterns rather than the extreme warmth seen in 2023, with a stronger signal for cold this season than last year.