forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Fri Oct 9 2026 |
| Tonight: Partly cloudy. 60 percent chance of showers early this evening with risk of a thunderstorm. Clearing overnight. Low zero. Saturday: Mainly sunny. High 14. Uv index 4 or moderate. Saturday Night: Partly cloudy. Low plus 3. Sunday: Cloudy with 30 percent chance of rain. High 20. Sunday Night: Cloudy with 60 percent chance of rain. Low 12. Monday: Cloudy. High 21. Monday Night: Cloudy with 40 percent chance of showers. Low 7. Tuesday: Cloudy with 40 percent chance of showers. High 15. Tuesday Night: Cloudy. Low plus 2. Wednesday: A mix of sun and cloud. High 12. Wednesday Night: Clear. Low plus 2. Thursday: A mix of sun and cloud. High 12. |
regional radar

■ Cornwall
Rain Snow Ice Mix














