A sunny Friday in Ottawa, but it could rain on Race Weekend

A sunny day in Ottawa. May 21, 2026. (CTV News Ottawa)

It will be a sunny Friday in the nation’s capital, but the forecast calls for rain on Sunday when thousands of people lace up for the Ottawa Marathon.

Environment Canada’s weather forecast for Ottawa is sunny Friday with a high of 19 C.

A frost advisory that was issued on Thursday ended just before 8:30 a.m.

The overnight forecast is clear with a low of 5 C.

Saturday is looking sunny with a high of 21 C, in line with the seasonal average.

Sunday’s outlook is cloudy with showers and a high of 14 C.

Clouds linger on Monday with a 40 per cent chance of showers and a high of 21 C.

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