forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc Jun 02 2026 |
| Today: A mix of sun and cloud. Wind becoming north 20 km/h this afternoon. High 24. Uv index 8 or very high. Tonight: A few clouds. Wind north 20 km/h becoming light this evening. Low 8. Wednesday: Mainly sunny. High 27. Humidex 28. Uv index 8 or very high. Wednesday Night: Clear. Low 11. Thursday: Increasing cloudiness. High 28. 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. |
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