Env. Canada, European, American side by side around Ottawa and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
Ottawa, 08 is at its warmest in Jul (average highs near 26°C) and coldest in Feb (lows around -11°C), with roughly 1154 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Ottawa right now, and see exactly where they disagree.
Ottawa climate by month
average daytime high and overnight low across a typical year
Jan
-2°
-10°
Feb
0°
-11°
Mar
5°
-4°
Apr
12°
1°
May
20°
8°
Jun
24°
14°
Jul
26°
18°
Aug
24°
16°
Sep
23°
13°
Oct
15°
7°
Nov
6°
0°
Dec
0°
-6°
Common questions
What's the weather in Ottawa today?
On this page we show what Env. Canada, European, American each forecast for Ottawa today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Ottawa today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Env. Canada, European, American for Ottawa and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Ottawa?
No single model is always right. Env. Canada, European, American each run their own physics, so we line all three up: when they agree the Ottawa forecast is reliable, and when they split you should expect surprises. See our tested CA accuracy scoreboard for how the models compare.
What is the warmest month in Ottawa?
Jul is typically the warmest month in Ottawa, with average highs around 26°C.
How cold does Ottawa get?
The coldest month in Ottawa is Feb, when overnight lows average about -11°C.
How much rain does Ottawa get?
Ottawa sees roughly 1154 mm of precipitation a year, with Aug usually the wettest month.
The forecasts Canadians check
Environment Canada runs the national GEM model as open data, so it sits right in the comparison above. The Weather Network and AccuWeather keep theirs closed, so we link you to them.