forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Mon Oct 26 2026 |
| Tonight: Clearing early this evening. Wind northwest 20 km/h becoming light early this evening. Low minus 3. Wind chill minus 6 overnight. Tuesday: Sunny. Wind up to 15 km/h. High 8. Wind chill minus 7 in the morning. Uv index 3 or moderate. Tuesday Night: Clear. Wind up to 15 km/h. Low minus 4. Wind chill minus 6 overnight. Wednesday: A mix of sun and cloud. High 13. 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. |
regional radar

■ Cornwall
Rain Snow Ice Mix














