forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc Jun 04 2026 |
| Today: A mix of sun and cloud. Wind becoming southwest 20 km/h late this afternoon. High 29. Humidex 30. Uv index 9 or very high. Tonight: Partly cloudy. Wind southwest 20 km/h becoming light this evening. Low 15. Friday: A mix of sun and cloud. High 29. Humidex 31. Uv index 9 or very high. Friday Night: Cloudy with 60 percent chance of showers. Low 17. Saturday: Showers. High 22. Saturday Night: Cloudy with 60 percent chance of showers. Low 16. Sunday: A mix of sun and cloud with 30 percent chance of showers. High 25. Sunday Night: Cloudy periods with 30 percent chance of showers. Low 13. Monday: Sunny. High 26. Monday Night: Clear. Low 16. Tuesday: Sunny. High 30. Tuesday Night: Cloudy periods. Low 18. Wednesday: A mix of sun and cloud with 30 percent chance of showers. High 30. |
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