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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the BuzzLayer Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
For Wednesday, expect mainly cloudy skies across Toronto with a high near the mark shown in the live forecast above, as a broad area of low pressure over the Great Lakes keeps the region unsettled with the chance of a stray shower.
What is driving Toronto’s current weather pattern?
A slow-moving system anchored over Lake Huron is pulling moisture into the Greater Toronto Area, creating a stubborn deck of cloud. Winds will be light from the northeast, keeping temperatures a few degrees below the seasonal average of 22°C. The best chance for any sun breaks will be west of the city, near Mississauga and Halton Region.
When might the skies clear?
Conditions should begin to improve late Thursday as a ridge of high pressure builds in from Manitoba. Friday looks fair and brighter across the city, offering a reprieve before the next system arrives from the northwest late in the weekend. For a broader look at conditions across the country, visit our Canada weather hub.
Why does Toronto feel so muggy in summer?
Toronto’s location on Lake Ontario and proximity to the St. Lawrence River valley allows humid air from the Gulf of Mexico to pool here. West of the city, the Niagara Escarpment sometimes blocks the breeze, trapping moisture.
Is Toronto affected by lake-effect snow?
Yes, especially neighbourhoods east of the Don Valley and areas near Scarborough Bluffs. When cold air crosses the relatively warm waters of Lake Ontario, it picks up moisture and dumps narrow bands of snow just inland.
How does Toronto’s weather compare to Ottawa’s?
Ottawa is farther inland and has a more continental climate means colder winters and hotter, drier summers. Toronto’s lake-moderated weather tends to stay a few degrees milder in winter, though with more cloud cover year-round.