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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.
Toronto’s extreme cold this week pushes wind chill values near –30 C, with Environment Canada issuing an extreme cold warning for the city and surrounding regions. Residents should limit time outdoors and check on neighbours, especially the elderly and those without adequate heating.
How long will this extreme cold last?
The extreme cold warning for Toronto is expected to remain in effect through Wednesday morning, when a moderating Pacific airmass begins to nudge temperatures up. Daytime highs will stay below –15 C until Thursday, with overnight lows near –22 C and a biting northwest wind.
What precautions should you take?
Dress in layers, cover exposed skin, and keep emergency supplies in your vehicle. Public shelters and warming centres are open across the city. Watch for signs of hypothermia and frostbite — if you see someone in distress, call 311 or 911. For the latest conditions, check our Canada weather hub and follow Environment Canada weather alerts.
What triggers an extreme cold warning in Toronto?
An extreme cold warning is issued when the temperature or wind chill is expected to reach –30 C for at least two hours. Environment Canada monitors conditions closely, and the warning helps residents prepare for dangerous cold.
How can I protect my home’s pipes from freezing?
Let faucets drip slightly, open cabinet doors to let warm air circulate, and seal any drafts around windows and doors. If pipes freeze, shut off the main water valve and call a plumber — never use an open flame to thaw them.
Is it safe to walk outside during an extreme cold warning?
Short trips are usually safe if you dress properly — multiple layers, hat, mitts, scarf and insulated boots. Limit exposure to 10–15 minutes. Anyone with heart or respiratory conditions should avoid going out entirely.