forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1100 ET Sat Jul 4 2026 |
| Today: Mainly cloudy. Temperature steady near 25. Humidex 30. Uv index 7 or high. Tonight: Clear. Low 14. Sunday: Sunny. High 27. Humidex 29. Uv index 8 or very high. Sunday Night: Cloudy. Low 16. Monday: A mix of sun and cloud. High 28. Monday Night: Clear. Low 16. Tuesday: Sunny. High 29. Tuesday Night: Clear. Low 17. Wednesday: A mix of sun and cloud with 30 percent chance of showers. High 29. Wednesday Night: Clear. Low 19. Thursday: Cloudy with 40 percent chance of showers. High 29. Thursday Night: Cloudy with 40 percent chance of showers. Low 17. Friday: Cloudy. High 26. |
regional radar

■ Cornwall
Rain Snow Ice Mix















