Ontario weather averages

Going to Ontario? Find the best month to visit Ontario based on the weather.

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Check Ontario weather averages before you book your next holiday in 2018/2019. Today's maximum temperature in Ontario is expected to be 25°C, while the average maximum temperature in July is 27°C. The holiday weather guide shown above is for Toronto.

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Metric (°C / mm)  |  Imperial (°F / inches)

Ontario weather averages: best month

Ontario Best month Averages
Warmest July 27°C
Sunniest June & July 9 hours per day
Least rain July 9 days
Warmest sea August 21°C

Ontario climate guide

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Tropical storm risk: Ontario, Canada hurricane season

% of month affected by tropical storms
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The Ontario, Canada tropical storm risk chart above shows the hurricane season for Toronto, Ontario, Canada.

More about tropical storms

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Ontario weather averages by month

Check Ontario holiday weather averages for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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Compare Ontario weather with the USA

Below the Ontario weather chart shows maximum daytime temperature for Ontario, Canada (Toronto) and the USA (Washington). For more weather parameters or to change the destinations shown visit the comparison weather tool.

Maximum daytime temperature (°C)

Ontario, Canada (Toronto)
USA (Washington)
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Metric (°C / mm)  |  Imperial (°F / inches)

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Popular Ontario destinations

More Ontario destinations

All destinations (A to Z)

Can't see your chosen destination? Use our A to Z search to find your required the holiday weather guide:

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