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Ontario climate
Climate normals for 86 cities in Ontario — find your city, or get the regional gist.
Across the 86 cities we cover in Ontario, annual averages run 35–51°F. Annual precipitation ranges 26.8–47.0 in across those cities. The region spans 3 Köppen zones (Dfb · Cfa · Dfa).
Largest cities in Ontario
The most populous cities — most visitors want one of these. Tap a name for month-by-month detail.
Toronto
Population 2.8M
Warm summers, cold winters
Avg
23°F in January, 71°F in July
Ottawa
Population 1.0M
Warm summers, very cold winters
Avg
15°F in January, 71°F in July
Mississauga
Population 718k
Warm summers, very cold winters
Avg
23°F in January, 71°F in July
Brampton
Population 656k
Warm summers, very cold winters
Avg
23°F in January, 71°F in July
Hamilton
Population 569k
Warm summers, cold winters
Avg
25°F in January, 71°F in July
London
Population 422k
Warm summers, cold winters
Avg
24°F in January, 70°F in July
Climate types in Ontario:Dfb
Warm-summer humid continentalCfa
Humid subtropicalDfa
Hot-summer humid continental
Find a city in Ontario
Search 86 cities by name.