Home › Weather › Toronto Cold Weather Alert
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Northern Focus Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
A Toronto Cold Weather Alert is issued by the City when temperatures are forecast to reach –15°C or colder, or when wind chill makes it feel like –20°C or below. It activates extra shelter spaces and outreach services to help vulnerable residents stay safe during extreme cold.
What triggers a cold weather alert?
Environment and Climate Change Canada forecasts provide the basis. If the daytime high stays at or below –15°C, or if wind chill values hit –20°C or lower for several hours, the City’s Medical Officer of Health declares the alert. Alerts can also be called when heavy snowfall or prolonged bitter cold creates elevated risk. If you’re checking a snowfall warning Toronto tomorrow, keep in mind that a cold alert may follow if the snow clears and temperatures plummet.
What changes when an alert is in effect?
Emergency warming centres open across the city, overnight shelter capacity increases, and outreach teams check on people living outdoors. The City also issues a Toronto weather warning today through its public alert system and recommends limiting time outside. For those wanting to plan ahead, a Toronto weather alert tomorrow can prompt early clothing and travel adjustments. These events are separate from spring or summer hazards—you won’t see a tornado warning today Toronto related to a cold alert, but winter storms sometimes precede the deep cold.
How long does a cold weather alert usually last?
Most alerts last one to two days, ending when temperatures are forecast to rise above the thresholds. In prolonged cold snaps, the City may extend an alert or issue consecutive ones.
Should I stay indoors during a cold weather alert?
If you are healthy and dressed warmly, brief outdoor trips are usually safe. However, avoid prolonged exposure and watch for signs of frostbite or hypothermia. Vulnerable individuals, including older adults and those without shelter, are strongly advised to seek heated spaces.
Where can I find the nearest warming centre?
Visit the City of Toronto’s website or call 311 for a list of open warming centres, drop-in spaces, and 24-hour shelters. You can also check our Canada weather hub for links to local resources.