Ottawa weather averages

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

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Check Ottawa weather averages before you book your next holiday in 2018/2019. Today's maximum temperature in Ottawa is expected to be 28°C, while the average maximum temperature in August is 25°C.

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More about Ottawa

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

Ottawa weather averages: best month

Ottawa Best month Averages
Warmest July 26°C
Sunniest July 9 hours per day
Least rain March, April, July & August 11 days

Ottawa climate guide

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Tropical storm risk: Ottawa, Canada hurricane season

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

More about tropical storms

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Ottawa weather averages by month

Check Ottawa 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 Ottawa weather with the USA

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

Maximum daytime temperature (°C)

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

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Popular Ontario destinations

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