forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1822 ET Fri Oct 30 2026 |
| Tonight: Cloudy. Becoming partly cloudy near midnight. Low 14. Thursday: Increasing cloudiness in the morning. Wind becoming southwest 30 km/h gusting to 50 in the morning. High 22. Humidex 27. Uv index 4 or moderate. Thursday Night: Showers. Wind southwest 30 km/h becoming light early in the evening. Wind becoming southwest 20 gusting to 40 near midnight. Low 16. Friday: Cloudy with 40 percent chance of showers. High 19. Friday Night: Clear. Low 6. Saturday: Sunny. High 18. Saturday Night: Clear. Low plus 4. Sunday: Cloudy. High 19. Sunday Night: Cloudy periods with 30 percent chance of showers. Low 8. Monday: A mix of sun and cloud. High 12. Monday Night: Clear. Low plus 1. Tuesday: Sunny. High 12. |
regional radar

■ Cornwall
Rain Snow Ice Mix














