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| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1654 ET Wed Oct 14 2026 |
| Tonight: Cloudy. 30 percent chance of drizzle early this evening. Wind west 30 km/h becoming light this evening. Low plus 1. Thursday: Sunny. High 12. Uv index 4 or moderate. Thursday Night: A few clouds. Increasing cloudiness near midnight then 40 percent chance of showers before morning. Wind becoming east 20 km/h gusting to 40 near midnight. Low plus 5. Friday: Rain. High 9. Friday Night: Cloudy with 40 percent chance of showers. Low zero. Saturday: A mix of sun and cloud. High 6. Saturday Night: Cloudy periods with 30 percent chance of rain showers or flurries. Low minus 1. Sunday: Sunny. High 12. Sunday Night: Clear. Low plus 4. Monday: Sunny. High 16. Monday Night: Cloudy periods. Low plus 4. Tuesday: A mix of sun and cloud. High 15. |
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