forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc Jun 13 2026 |
| Today: Sunny near noon then a mix of sun and cloud with 30 percent chance of showers late this afternoon. Risk of a thunderstorm late this afternoon. Wind west 30 km/h gusting to 50. High 28. Humidex 31. Uv index 8 or very high. Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm. Wind southwest 30 km/h becoming light this evening. Low 16. Sunday: Cloudy. 60 percent chance of showers in the morning. Showers beginning in the morning. Risk of a thunderstorm. High 22. Humidex 28. Uv index 3 or moderate. Sunday Night: Showers. Low 13. Monday: A mix of sun and cloud. High 19. Monday Night: Clear. Low 13. Tuesday: Sunny. High 23. Tuesday Night: Clear. Low 15. Wednesday: Increasing cloudiness. High 26. Wednesday Night: Cloudy. Low 14. Thursday: Showers. High 21. Thursday Night: Cloudy. Low 16. Friday: Cloudy with 30 percent chance of showers. High 21. |
regional radar

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