forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 0500 ET Tue Oct 27 2026 |
| Today: Sunny. Wind up to 15 km/h. High 8. Wind chill minus 7 this morning. Uv index 3 or moderate. Tonight: Clear. Increasing cloudiness overnight. Wind up to 15 km/h. Low minus 4. Wind chill minus 6 overnight. Wednesday: Cloudy. Wind up to 15 km/h. High 10. Wind chill minus 5 in the morning. Uv index 2 or low. Wednesday Night: Cloudy. Low 6. Thursday: A mix of sun and cloud with 30 percent chance of showers. High 20. Thursday Night: Cloudy with 40 percent chance of showers. Low 11. Friday: Clearing. High 16. Friday Night: Clear. Low plus 4. Saturday: A mix of sun and cloud. High 12. Saturday Night: Cloudy. Low 6. Sunday: Cloudy with 30 percent chance of showers. High 13. Sunday Night: Cloudy with 40 percent chance of showers. Low 8. Monday: Cloudy with 30 percent chance of showers. High 13. |
regional radar

■ Cornwall
Rain Snow Ice Mix














