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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 Mon Sep 14 2026
Tonight: Partly cloudy. Clearing this evening. Fog patches developing overnight. Wind northwest 20 km/h gusting to 40 becoming light early this evening. Low plus 1 with patchy frost.
Tuesday: Sunny in the morning then a mix of sun and cloud with 60 percent chance of showers in the afternoon. Fog patches dissipating in the morning. Wind becoming south 20 km/h gusting to 40 in the morning. High 21. Uv index 6 or high.
Tuesday Night: Mainly cloudy with 60 percent chance of showers. Wind south 20 km/h gusting to 40 becoming light in the evening. Low 15.
Wednesday: Sunny. High 26.
Wednesday Night: Cloudy periods. Low 13.
Thursday: A mix of sun and cloud with 30 percent chance of showers. High 25.
Thursday Night: Clear. Low 11.
Friday: Sunny. High 23.
Friday Night: Clear. Low 8.
Saturday: Cloudy. High 17.
Saturday Night: Cloudy with 30 percent chance of showers. Low 10.
Sunday: Cloudy with 30 percent chance of showers. High 19.

regional radar

Cornwall
🌧 Rain Snow 🧊 Ice 🌨 Mix

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On September 15th

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