forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Fri Oct 2 2026 |
| Tonight: Clear. Fog patches developing overnight. Wind west 20 km/h becoming light this evening. Low 6. Saturday: Sunny. Fog patches dissipating in the morning. High 16. Uv index 5 or moderate. Saturday Night: Clear. Fog patches developing overnight. Low plus 4. Sunday: A mix of sun and cloud with 30 percent chance of showers. High 19. Sunday Night: Cloudy with 40 percent chance of showers. Low 7. Monday: A mix of sun and cloud with 30 percent chance of showers. High 13. Monday Night: Clear. Low plus 1. Tuesday: Sunny. High 12. Tuesday Night: Cloudy periods. Low plus 1. Wednesday: A mix of sun and cloud with 40 percent chance of showers. High 16. Wednesday Night: Cloudy periods with 30 percent chance of showers. Low plus 5. Thursday: A mix of sun and cloud with 30 percent chance of showers. High 18. |
regional radar

■ Cornwall
Rain Snow Ice Mix














