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| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1736 ET Tue Oct 13 2026 |
| Tonight: Cloudy with 70 percent chance of showers or drizzle. Risk of a thunderstorm this evening. Fog patches developing this evening. Temperature steady near 9. Wednesday: Cloudy with 30 percent chance of showers. Fog patches dissipating in the morning. Wind becoming west 20 km/h late in the morning. High 15. Uv index 2 or low. Wednesday Night: Cloudy. Low plus 3. Thursday: A mix of sun and cloud. High 11. Thursday Night: Cloudy with 60 percent chance of rain. Low plus 5. Friday: Rain. High 10. Friday Night: Cloudy with 60 percent chance of showers. Windy. Low zero. Saturday: A mix of sun and cloud with 30 percent chance of rain showers or flurries. High plus 5. Saturday Night: Cloudy periods with 30 percent chance of rain showers or flurries. Low minus 2. Sunday: Sunny. High 11. Sunday Night: Clear. Low plus 4. Monday: A mix of sun and cloud. High 14. |
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