forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 0900 utc Jun 03 2026 |
| Today: Mainly sunny. Wind becoming west 20 km/h this afternoon. High 27. Humidex 28. Uv index 8 or very high. Tonight: A few clouds. Wind west 20 km/h becoming light this evening. Low 12. Thursday: A mix of sun and cloud. Wind becoming southwest 20 km/h in the afternoon. High 29. Humidex 30. Uv index 8 or very high. Thursday Night: Cloudy periods. Low 14. Friday: A mix of sun and cloud with 30 percent chance of showers. High 28. Friday Night: Cloudy with 40 percent chance of showers. Low 16. Saturday: A mix of sun and cloud with 40 percent chance of showers. High 25. Saturday Night: Cloudy. Low 15. Sunday: A mix of sun and cloud. High 25. Sunday Night: Clear. Low 13. Monday: Sunny. High 28. Monday Night: Clear. Low 14. Tuesday: Sunny. High 30. |
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