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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 Thu Sep 10 2026
Tonight: Partly cloudy. Clearing late this evening. Fog patches developing overnight. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low 9.
Friday: Sunny. Fog patches dissipating in the morning. Wind west 20 km/h becoming light in the afternoon. High 21. Uv index 6 or high.
Friday Night: Clear. Low 10.
Saturday: Increasing cloudiness. High 25.
Saturday Night: Cloudy with 40 percent chance of showers. Low 16.
Sunday: Cloudy with 60 percent chance of showers. High 25.
Sunday Night: Cloudy periods with 30 percent chance of showers. Low 12.
Monday: Sunny. High 20.
Monday Night: Clear. Low 12.
Tuesday: A mix of sun and cloud with 60 percent chance of showers. High 25.
Tuesday Night: Cloudy periods with 60 percent chance of showers. Low 14.
Wednesday: A mix of sun and cloud with 40 percent chance of showers. High 22.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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this day in history

On September 10th

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Explore the Seaway City

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Discover the Counties of SDG

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