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| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 0500 ET Thu Nov 5 2026 |
| Today: Showers ending late this afternoon then a mix of sun and cloud. Risk of a thunderstorm late this morning. High 19. Uv index 1 or low. Tonight: Partly cloudy. Low 9. Friday: Mainly cloudy. 30 percent chance of showers late in the afternoon. High 16. Uv index 2 or low. Friday Night: Cloudy with 40 percent chance of showers. Low 9. Saturday: Cloudy. High 14. Saturday Night: Cloudy. Low 7. Sunday: Cloudy with 30 percent chance of showers. High 9. Sunday Night: Cloudy periods with 30 percent chance of showers. Low plus 2. Monday: A mix of sun and cloud. High 7. Monday Night: Cloudy periods. Low plus 3. Tuesday: A mix of sun and cloud. High 10. Tuesday Night: Cloudy periods. Low plus 2. Wednesday: A mix of sun and cloud. High 7. |
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