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| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1100 ET Tue Jul 14 2026 |
| Today: A mix of sun and cloud. 30 percent chance of showers late this afternoon with risk of thunderstorms. Wind southwest 30 km/h gusting to 50. High 34. Humidex 42. Uv index 9 or very high. Tonight: Mainly cloudy with 30 percent chance of showers and risk of thunderstorms. Hazy. Wind southwest 30 km/h gusting to 50 becoming light late this evening. Low 20. Wednesday: Sunny. Hazy in the morning. Wind becoming west 30 km/h gusting to 50 in the morning. High 29. Humidex 33. Uv index 9 or very high. Wednesday Night: Clear. Low 15. Thursday: Cloudy with 30 percent chance of showers. High 27. Thursday Night: Clear. Low 14. Friday: Sunny. High 25. Friday Night: Cloudy periods. Low 14. Saturday: Cloudy with 40 percent chance of showers. High 21. Saturday Night: Cloudy with 30 percent chance of showers. Low 14. Sunday: A mix of sun and cloud with 30 percent chance of showers. High 25. Sunday Night: Cloudy periods. Low 15. Monday: Cloudy with 30 percent chance of showers. High 26. |
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