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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 1100 ET Sat Jul 4 2026
Today: Mainly cloudy. Temperature steady near 25. Humidex 30. Uv index 7 or high.
Tonight: Clear. Low 14.
Sunday: Sunny. High 27. Humidex 29. Uv index 8 or very high.
Sunday Night: Cloudy. Low 16.
Monday: A mix of sun and cloud. High 28.
Monday Night: Clear. Low 16.
Tuesday: Sunny. High 29.
Tuesday Night: Clear. Low 17.
Wednesday: A mix of sun and cloud with 30 percent chance of showers. High 29.
Wednesday Night: Clear. Low 19.
Thursday: Cloudy with 40 percent chance of showers. High 29.
Thursday Night: Cloudy with 40 percent chance of showers. Low 17.
Friday: Cloudy. High 26.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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this day in history

On July 4th

explore the seaway city

Explore the Seaway City

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Discover the Counties of SDG

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