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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the True North Brief Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Toronto weather features a humid continental climate: January averages –7°C to –1°C, July averages 18°C to 27°C, and annual snowfall is about 120 centimetres. The city experiences four distinct seasons, with cold, snowy winters and warm, humid summers.
What are Toronto’s seasonal weather patterns?
Winter (December–February) brings frequent snow and temperatures often below –10°C at night. Spring (March–May) is transitional, with average highs rising from 4°C to 19°C and moderate rainfall. Summer (June–August) is hot and humid, with daytime highs above 30°C on occasion and afternoon thunderstorms. Autumn (September–November) is mild and crisp, with decreasing temperatures and colourful foliage.
How does Toronto’s weather affect daily life?
Summer humidity and winter cold both influence activity choices. The city’s lake-effect snow can cause sudden accumulations, while summer heat warnings are common. Residents rely on layered clothing and seasonal preparedness. For current conditions and advisories, see the Canada weather hub and weather warning page.
When is the best time to visit Toronto for pleasant weather?
Late spring (May–June) and early autumn (September–October) offer mild temperatures, lower humidity, and fewer rain days. July and August are warm but often muggy, while winter appeals to those who enjoy snow and winter festivals.
Does Toronto experience extreme weather?
Yes. Toronto can see heat waves, ice storms, and occasional tornadoes. Lake-effect snow squalls affect the city, and winter cold snaps bring wind chill values below –20°C. Environment Canada issues alerts for these events.
How humid does Toronto get in summer?
Humidity levels often push the humidex above 35°C on the hottest days, making it feel uncomfortably sticky. Dew points frequently reach 20°C in July, contributing to the risk of heat-related illness without proper hydration and shade.