Current Weather and Forecast in Ottawa, Canada
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About the weather in Ottawa
Ottawa has a humid continental climate. July is the warmest month, with average highs of 80°, and January the coldest, when nights fall to around 8°. August brings the most rain, on about 13 days, while July is the sunniest, with 12.0 hours of sunshine a day. Over a whole year it rains on roughly 140 days.
Ottawa climate guide: monthly averages, seasons and the best time to visit
Common questions
When is Ottawa at its coldest?
January, with highs of 25°F (-4°C) and lows near 8°F (-13°C). The coldest day in the 2015-2024 record fell to -26°F (-32°C).
How many rainy days does Ottawa get in a year?
About 140 days bring measurable precipitation, totalling 43.8 inches (1112 mm). That works out at roughly 7.9 mm on an average wet day.
What is the best time to visit Ottawa?
The best time to visit Ottawa is generally May to October, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 71°F (22°C), with rain on about 12 days a month. For the same question asked the other way round, see where else is warm in May.
Which month is wettest in Ottawa?
August, at 4.8 inches (121 mm) over about 13 days. February is the driest month, at 2.9 inches (74 mm).
How sunny is Ottawa?
8.0 hours a day averaged over the year, peaking in July at 12.0 hours.
Is there snow in Ottawa?
Yes - about 34 days a year carry measurable snowfall, concentrated October through April.
Which month is warmest in Ottawa?
July, averaging 80°F (27°C) by day and 63°F (17°C) overnight. The hottest single day in our 2015-2024 record for this location reached 96°F (36°C).