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| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1633 ET Thu Nov 12 2026 |
| Tonight: Mainly cloudy. Wind up to 15 km/h. Low minus 4. Wind chill minus 8 overnight. Friday: Overcast. Wind up to 15 km/h. High plus 5. Wind chill minus 7 in the morning. Uv index 1 or low. Friday Night: Cloudy. 30 percent chance of flurries before morning. Wind up to 15 km/h. Low minus 2. Wind chill minus 6 overnight. Saturday: Cloudy with 40 percent chance of showers. High plus 3. Saturday Night: Cloudy with 30 percent chance of showers. Low minus 1. Sunday: A mix of sun and cloud. High plus 4. Sunday Night: Clear. Low minus 5. Monday: Sunny. High plus 4. Monday Night: Clear. Low zero. Tuesday: Sunny. High 7. Tuesday Night: Clear. Low plus 1. Wednesday: Sunny. High 9. |
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