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Current conditions
Our Cornwall skaters at the Optimist Park Skatepark
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forecast

detailed forecast

Extented weather forecast for Cornwall Ontario and the Seaway
Issued by Environment Canada at 1100 ET Sat Jun 27 2026
Today: A mix of sun and cloud. 30 percent chance of showers with risk of a thunderstorm. High 27. Humidex 32. Uv index 7 or high.
Tonight: Partly cloudy with 30 percent chance of showers early this evening then clear. Risk of a thunderstorm early this evening. Fog patches developing overnight. Wind northeast 30 km/h becoming light this evening. Low 14.
Sunday: Sunny in the morning and early in the afternoon then a mix of sun and cloud with 30 percent chance of showers in the afternoon. Risk of a thunderstorm in the afternoon. Fog patches dissipating in the morning. High 28. Humidex 31. Uv index 1 or low.
Sunday Night: Clear. Low 16.
Monday: Sunny. High 29.
Monday Night: Cloudy periods. Low 19.
Tuesday: Cloudy with 30 percent chance of showers. High 31.
Tuesday Night: Cloudy. Low 21.
Wednesday: Cloudy with 30 percent chance of showers. High 32.
Wednesday Night: Cloudy. Low 22.
Thursday: A mix of sun and cloud. High 31.
Thursday Night: Cloudy periods with 30 percent chance of showers. Low 20.
Friday: Cloudy with 30 percent chance of showers. High 31.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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sports headlines

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this day in history

On June 27th

explore the seaway city

Explore the Seaway City

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Discover the Counties of SDG

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