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5 Day Forecast - Ottawa,ON

Mon 7 Sep

high: 24°C
Sunny

Tue 8 Sep

high: 21°C
Cloudy

Wed 9 Sep

high: 23°C
Chance of showers
pop: 60%

Thu 10 Sep

high: 19°C
Chance of showers
pop: 40%

Fri 11 Sep

high: 20°C
Chance of showers
pop: 30%

Text Forecast Forecast issued 5:00 AM EDT Sunday 6 September 2026

Sunday: A mix of sun and cloud. Fog patches dissipating early this morning. High 23. Humidex 26. UV index 6 or high.

Sunday night: Partly cloudy with 30 percent chance of showers early this evening then clear. Fog patches developing after midnight. Low 10.

Monday: Sunny. Fog patches dissipating in the morning. High 24. Humidex 27. UV index 6 or high.

Monday night: Cloudy periods. Low 12.

Tuesday: Cloudy. High 21.

Tuesday night: Cloudy with 30 percent chance of showers. Low 14.

Wednesday: Cloudy with 60 percent chance of showers. High 23.

Wednesday night: Cloudy with 40 percent chance of showers. Low 15.

Thursday: A mix of sun and cloud with 40 percent chance of showers. High 19.

Thursday night: Cloudy periods. Low 8.

Friday: A mix of sun and cloud with 30 percent chance of showers. High 20.

Friday night: Cloudy periods with 30 percent chance of showers. Low 10.

Saturday: A mix of sun and cloud with 30 percent chance of showers. High 22.