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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 Wed Aug 5 2026
Tonight: A few clouds. Increasing cloudiness after midnight. Fog patches developing overnight. Wind west 20 km/h becoming light early this evening. Low 17.
Thursday: Mainly cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. Fog patches dissipating in the morning. High 28. Humidex 36. Uv index 8 or very high.
Thursday Night: Partly cloudy. 60 percent chance of showers in the evening with risk of a thunderstorm. Low 19.
Friday: Cloudy with 40 percent chance of showers. High 28.
Friday Night: Cloudy with 40 percent chance of showers. Low 18.
Saturday: Cloudy with 60 percent chance of showers. High 26.
Saturday Night: Cloudy with 60 percent chance of showers. Low 17.
Sunday: Clearing. High 26.
Sunday Night: Cloudy periods with 30 percent chance of showers. Low 16.
Monday: A mix of sun and cloud with 60 percent chance of showers. High 26.
Monday Night: Cloudy with 30 percent chance of showers. Low 16.
Tuesday: Cloudy. High 25.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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