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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 Sat Aug 15 2026
Tonight: Clear. Fog patches developing after midnight. Low 9.
Sunday: Increasing cloudiness. Fog patches dissipating in the morning. Wind becoming northeast 30 km/h in the afternoon. High 24. Humidex 28. Uv index 8 or very high.
Sunday Night: Cloudy with 60 percent chance of showers and risk of a thunderstorm. Wind northeast 20 km/h becoming light near midnight. Low 16.
Monday: Cloudy with 30 percent chance of showers. High 25.
Monday Night: Cloudy periods with 30 percent chance of showers. Low 14.
Tuesday: A mix of sun and cloud. High 26.
Tuesday Night: Clear. Low 14.
Wednesday: Cloudy with 40 percent chance of showers. High 25.
Wednesday Night: Cloudy with 60 percent chance of showers. Low 14.
Thursday: A mix of sun and cloud with 30 percent chance of showers. High 23.
Thursday Night: Cloudy periods with 40 percent chance of showers. Low 12.
Friday: A mix of sun and cloud. High 23.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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this day in history

On August 16th

explore the seaway city

Explore the Seaway City

discover the counties of sdg

Discover the Counties of SDG

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