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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 1100 ET Mon Sep 14 2026
Today: Sunny. Becoming a mix of sun and cloud this afternoon. Wind northwest 20 km/h becoming light this afternoon. High 19. Uv index 5 or moderate.
Tonight: Clearing. Fog patches developing overnight. Low 6.
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 early in the afternoon. High 20. Uv index 6 or high.
Tuesday Night: Cloudy periods with 40 percent chance of showers. Low 14.
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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sports headlines

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this day in history

On September 14th

explore the seaway city

Explore the Seaway City

discover the counties of sdg

Discover the Counties of SDG

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