forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Thu Sep 24 2026 |
| Tonight: Clear. Fog patches developing overnight. Low plus 3 with risk of frost. Friday: Sunny. Fog patches dissipating in the morning. Wind becoming northeast 20 km/h late in the morning. High 22. Uv index 5 or moderate. Friday Night: Clear. Low 7. Saturday: A mix of sun and cloud. High 22. Saturday Night: Cloudy periods. Low 9. Sunday: A mix of sun and cloud. High 22. Sunday Night: Cloudy periods. Low 10. Monday: A mix of sun and cloud. High 21. Monday Night: Cloudy periods. Low 9. Tuesday: A mix of sun and cloud. High 22. Tuesday Night: Cloudy periods. Low 10. Wednesday: A mix of sun and cloud. High 23. |
regional radar

■ Cornwall
Rain Snow Ice Mix














