forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1726 ET Fri Aug 14 2026 |
| Tonight: Partly cloudy. Low 11. Saturday: Mainly sunny. High 24. Humidex 26. Uv index 7 or high. Saturday Night: A few clouds. Low 11. Sunday: Cloudy with 40 percent chance of showers. High 21. Sunday Night: Cloudy with 70 percent chance of showers. Low 16. Monday: Cloudy with 30 percent chance of showers. High 25. Monday Night: Cloudy periods with 30 percent chance of showers. Low 13. Tuesday: A mix of sun and cloud. High 24. Tuesday Night: Cloudy periods. Low 16. Wednesday: Cloudy with 30 percent chance of showers. High 23. Wednesday Night: Cloudy with 60 percent chance of showers. Low 15. Thursday: A mix of sun and cloud with 40 percent chance of showers. High 23. |
regional radar

■ Cornwall
Rain Snow Ice Mix













