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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 17 2026
Today: Mainly cloudy. 40 percent chance of showers this morning. High 25. Humidex 33. Uv index 7 or high.
Tonight: A few clouds. Fog patches developing after midnight. Low 14.
Tuesday: A mix of sun and cloud. Fog patches dissipating in the morning. High 25. Humidex 29. Uv index 7 or high.
Tuesday Night: Cloudy periods with 30 percent chance of showers. Low 19.
Wednesday: Cloudy with 60 percent chance of showers. High 22.
Wednesday Night: Clear. Low 13.
Thursday: A mix of sun and cloud with 30 percent chance of showers. High 24.
Thursday Night: Cloudy periods with 30 percent chance of showers. Low 12.
Friday: A mix of sun and cloud. High 25.
Friday Night: Cloudy periods. Low 14.
Saturday: Cloudy. High 23.
Saturday Night: Cloudy. Low 15.
Sunday: A mix of sun and cloud. High 22.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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