forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Fri Oct 16 2026 |
| Tonight: Cloudy with 40 percent chance of showers. Wind northwest 30 km/h gusting to 50. Low zero. Saturday: Mainly sunny. Wind northwest 20 km/h gusting to 40 becoming light in the afternoon. High 7. Uv index 3 or moderate. Saturday Night: Increasing cloudiness. Wind up to 15 km/h. Low minus 3. Wind chill minus 7 overnight. Sunday: Sunny. High 15. Sunday Night: Clear. Low 6. Monday: Sunny. High 18. Monday Night: Clear. Low plus 4. Tuesday: Sunny. High 16. Tuesday Night: Clear. Low plus 4. Wednesday: Sunny. High 14. Wednesday Night: Clear. Low plus 3. Thursday: A mix of sun and cloud. High 13. |
regional radar

■ Cornwall
Rain Snow Ice Mix














