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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scope Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Check the live forecast above for today’s conditions in Toronto, then plan your day knowing that lake breezes and passing systems can shift temperatures quickly. The city’s weather is shaped by Lake Ontario and continental air masses, so a calm morning can turn into a chilly afternoon.
What makes Toronto’s weather so changeable?
Toronto sits in a zone where cold Arctic air meets warmer Gulf air, creating frequent swings in temperature and sky cover. Lake Ontario adds a local effect: in spring and early summer, the cool lake often keeps lakeside neighbourhoods several degrees cooler than inland areas, while in autumn the lake releases stored warmth, delaying the first frost.
What should you expect in each season?
Winter averages hover near −5°C but occasional polar outbreaks push lows below −20°C. Summer highs typically reach 26–30°C, though humidity can make it feel warmer. Spring and autumn are short transition seasons with mixed sun, rain and the occasional late snow or early heat spell.
Is Toronto’s weather usually humid in summer?
Yes. Warm, moist air from the Great Lakes and the Gulf of Mexico often pushes the humidex above 35°C. The high humidity can make afternoons feel more oppressive than the actual temperature suggests.
Does it rain more in spring or fall?
Spring tends to be the wettest season, with April and May each averaging about 65–75 mm of rain. Fall is slightly drier but can bring prolonged drizzle from lake-effect clouds.
How often does Toronto get lake-effect snow?
Lake-effect snow is less common than in areas east of the lake, but when cold northwest winds blow across Lake Ontario, parts of Toronto can see sudden, heavy snow squalls.
For a broader look at conditions across the country, visit our Canada weather hub. Learn more about patterns in Toronto Weather or see how it compares to Ottawa Weather.