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Current conditions
Cornwall skaters at the Optimist Park Skatepark
Shadow

forecast

detailed forecast

Extented weather forecast for Cornwall Ontario and the Seaway
Issued by Environment Canada at 1530 ET Sun Aug 9 2026
Tonight: Partly cloudy. Low 18.
Monday: Cloudy. 40 percent chance of showers late in the morning and early afternoon with risk of a thunderstorm. High 25. Humidex 30. Uv index 6 or high.
Monday Night: Mainly cloudy. 60 percent chance of showers in the evening and after midnight with risk of a thunderstorm. Low 18.
Tuesday: A mix of sun and cloud. High 25.
Tuesday Night: Clear. Low 12.
Wednesday: A mix of sun and cloud with 30 percent chance of showers. High 25.
Wednesday Night: Cloudy with 30 percent chance of showers. Low 15.
Thursday: A mix of sun and cloud with 40 percent chance of showers. High 25.
Thursday Night: Cloudy periods with 40 percent chance of showers. Low 15.
Friday: A mix of sun and cloud. High 24.
Friday Night: Clear. Low 12.
Saturday: Sunny. High 25.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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this day in history

On August 9th

explore the seaway city

Explore the Seaway City

discover the counties of sdg

Discover the Counties of SDG

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