Toronto

Ontario Weather & Climate: Canada

Climate by month across Ontario, Canada, average temperatures, rainfall and the best time to visit.

Climate overview of Ontario

In Canada you have several regions, one of which is called Ontario. The most popular city in this region is Toronto, whose climate data we'll examine to provide you with an overview of what weather to expect in Ontario. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.

In Ontario, the months of June, July, August and September bring pleasant weather, with average temperatures ranging between 22°C (72°F) and 26°C (79°F).

The warmest weather in Ontario arrives in July, when temperatures climb to 26°C (79°F). In contrast, February sees the mercury drop to daytime highs of 0°C (32°F).

The coldest months generally fall in January, February, March, April, November and December.

When it comes to rainfall, Ontario maintains fairly consistent rainfall patterns throughout the year, with April seeing 95 mm (3.7 in) and August receiving 67 mm (2.6 in).

For those seeking sunshine, July usually has the brightest skies, making it an excellent time for exploring the region.

Explore Ontario by month

Popular cities by month

Compare cities per month. Toggle cities on/off.

Toronto Ottawa Niagara Falls Mississauga Niagara on the Lake Kingston
Day temperature (°C)
Monthly rainfall (mm)
Monthly sunshine (hours)

Climate map of Ontario

Average daily temperature, monthly rainfall & sunshine hours across cities.

Avg day temp (°C)
32°

Compare popular cities

Average daytime and nighttime temperatures, yearly rainfall and sunshine.

Toronto 1°C (34°F) 26°C (79°F) -7°C (19°F) 18°C (64°F) 964 mm (38 in) 2,070 hours
Ottawa -4°C (25°F) 27°C (81°F) -15°C (5°F) 15°C (59°F) 1088 mm (43 in) 2,087 hours
Niagara Falls -1°C (30°F) 27°C (81°F) -8°C (18°F) 17°C (63°F) 929 mm (37 in) 2,211 hours
Mississauga 0°C (32°F) 27°C (81°F) -8°C (18°F) 17°C (63°F) 941 mm (37 in) 2,184 hours
Niagara on the Lake 0°C (32°F) 20°C (68°F) -5°C (23°F) 12°C (54°F) 625 mm (25 in) 2,211 hours
Kingston -1°C (30°F) 26°C (79°F) -10°C (14°F) 19°C (66°F) 1131 mm (45 in) 1,971 hours

Places in Ontario, Canada

Select a city to see its average temperature, precipitation and hours of sunshine over the year.

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Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.