forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Sat Oct 10 2026 |
| Tonight: Clear. Low plus 3. Sunday: Sunny. Becoming a mix of sun and cloud in the afternoon. High 17. Uv index 4 or moderate. Sunday Night: Cloudy. 40 percent chance of showers in the evening and after midnight. Low 8. Monday: Cloudy. High 18. Monday Night: Cloudy with 40 percent chance of showers. Low 8. Tuesday: Cloudy with 40 percent chance of showers. High 17. Tuesday Night: Cloudy with 30 percent chance of showers. Low plus 5. Wednesday: Cloudy. High 9. Wednesday Night: Clear. Low plus 4. Thursday: Sunny. High 13. Thursday Night: Cloudy periods. Low plus 3. Friday: Cloudy with 40 percent chance of showers. High 11. |
regional radar

■ Cornwall
Rain Snow Ice Mix














