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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 0500 ET Mon Aug 10 2026
Today: A mix of sun and cloud with 40 percent chance of showers and risk of a thunderstorm. High 25. Humidex 30. Uv index 8 or very high.
Tonight: Cloudy. 40 percent chance of showers this evening with risk of a thunderstorm. Low 17.
Tuesday: A mix of sun and cloud. Wind becoming northwest 20 km/h near noon. High 25. Humidex 30. Uv index 7 or high.
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.
Saturday Night: Clear. Low 12.
Sunday: A mix of sun and cloud. High 24.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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this day in history

On August 10th

explore the seaway city

Explore the Seaway City

discover the counties of sdg

Discover the Counties of SDG

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