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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 1 2026
Tonight: Partly cloudy with 40 percent chance of showers. Showers beginning before morning. Risk of a thunderstorm this evening. Low 20.
Sunday: Showers changing to rain at Times heavy late in the morning. Risk of a thunderstorm in the afternoon. Local amount 30 to 40 mm. Wind becoming northeast 30 km/h late in the morning then light in the afternoon. High 27. Humidex 35. Uv index 3 or moderate.
Sunday Night: Periods of rain with risk of a thunderstorm. Local amount 10 to 15 mm. Low 19.
Monday: Cloudy with 40 percent chance of showers. High 26.
Monday Night: Cloudy periods. Low 15.
Tuesday: Sunny. High 27.
Tuesday Night: Clear. Low 16.
Wednesday: Sunny. High 28.
Wednesday Night: Cloudy periods with 30 percent chance of showers. Low 18.
Thursday: A mix of sun and cloud with 40 percent chance of showers. High 28.
Thursday Night: Cloudy periods with 40 percent chance of showers. Low 18.
Friday: Cloudy with 30 percent chance of showers. High 28.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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this day in history

On August 1st

explore the seaway city

Explore the Seaway City

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Discover the Counties of SDG

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