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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Prepare for a sharp drop in temperatures across Toronto over the next few days, as the live forecast above shows a cold snap settling in from the northwest. This Arctic air mass will bring wind chills making it feel significantly colder than the actual reading, so layer up before heading out.
Why is this cold snap arriving in Toronto?
This cold snap pushes down from northern Manitoba, riding a strong ridge of high pressure that funnels cold air across the Great Lakes. Lake Ontario, though warmer than the air, won’t moderate temperatures much because winds are shifting off the land, not the lake. Expect daytime highs several degrees below seasonal norms for this time of year.
How long will the cold last in Toronto?
The core of the cold will hold for about 48 to 72 hours, with the coldest period likely tonight and tomorrow morning. A moderating trend should arrive by the middle of next week as the ridge weakens, though a secondary system could bring flurries. Check our Toronto Weather page for the hourly breakdown.
Should I worry about freezing pipes in Toronto?
Yes, especially in older homes or uninsulated basements. Let a trickle of water run from taps farthest from the main valve, and open cabinet doors to let warm air reach pipes. Wrap exposed pipes if possible.
Will the cold snap affect flights at Pearson airport?
It can. Frigid air reduces lift and can cause de-icing fluid to freeze more quickly, leading to delays. Check your airline before heading out. The cold itself rarely grounds flights, but wind chill may slow ground crews.
How does Toronto’s cold snap compare to Calgary’s?
Toronto’s cold snaps are shorter and less extreme than Calgary’s chinook-influenced events. Calgary can see rapid swings of 20 degrees in hours; Toronto’s cold lingers but rarely reaches Prairie extremes. Compare our Calgary Weather page for context.