Which is the hottest month in Ottawa?

The hottest time of year in Ottawa is normally July. Expect maximum daytime temperatures to reach 27°C with low heat and humidity.

Which month has the most rain in Ottawa?

In terms of rainfall, August is usually the wettest month in Ottawa with 83mm on average. There are normally 10 days in August with some rain.

When is it sunniest in Ottawa?

The sunniest time of year in Ottawa is normally July with bright sunshine on average for 60% of daylight hours; that's 9 hours of sunshine per day.

When is the sea warmest in Ottawa?

The sea is usually at its warmest in Ottawa in August when the water temperature reaches 21°C.

Best time to visit Ottawa

Q: When is the best time to visit Ottawa?

The best times to visit Ottawa, Ontario are in June, July and August Daily hours of sunshine = 8 hours or more.

The best times to visit Ottawa, Ontario are in June, July and August based on our default weather conditions. Update your weather preferences to see which months best match.

Ottawa by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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When is the best time to visit Ottawa?

The best times to visit Ottawa, Ontario are in June, July and August based on the following average weather conditions.

Daily hours of sunshine = 8 hours or more [remove]

Change the criteria to reflect your weather preferences.

1.5
Jan
2.5
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Mar
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Apr
4.5
May
5
Jun
5
Jul
5
Aug
4
Sep
2.5
Oct
1.5
Nov
0.5
Dec

Change criteria

Hours of Sunshine (daily)

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Jan
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Feb
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Mar
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Apr
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May
8
Jun
9
Jul
8
Aug
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Sep
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Oct
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Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Ontario (Ottawa) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

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