Ottawa weather

Get the latest coronavirus (COVID-19) updates for Canada with current travel advice, statistics and online resources.

Usually in January
- -6
- -16
- 3
Weather by month
Now Today
- -5
- 1
5-day forecast

Recommended for Ontario

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

The weather guide for Ottawa, Ontario 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.

Cosmos sale: up to £772 off tours + £300 air credit

Sale

Save up to £772 per couple on tours in 2021
Plus receive up to £300 in air credit
Book escorted tours & cruises with Cosmos & Globus

Go to Cosmos deal >>

Expires at 23:59 on Sunday 28th Feb 2021 · View all Cosmos offers

Which is the hottest month in Ottawa?

The hottest time of year in Ottawa is normally July. Expect maximum daytime temperatures to reach 26°C with low heat and humidity.

Which month has the most rain in Ottawa?

In terms of rainfall, July is usually the wettest month in Ottawa with 88mm on average. There are normally 11 days in July 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 59% of daylight hours; that's 9 hours of sunshine per day.

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

Discover more about Canada

Compare Ottawa weather with the USA

Below the Ottawa weather chart shows average maximum daytime temperature for Ottawa, Ontario, Canada and the USA (Washington).

Maximum daytime temperature (°C)

Ottawa, Ontario, Canada

USA (Washington)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

-6

-4

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

Compare more Ottawa weather >>

Where's warm in Ontario right now?

Below are the temperatures expected today at popular destinations in Ontario. Select a destination to compare today's forecast with average weather conditions.