forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1100 ET Wed Jul 8 2026 |
| Today: Mainly sunny. High 30. Humidex 36. Uv index 9 or very high. Tonight: A few clouds. Low 18. Thursday: Cloudy. 40 percent chance of showers in the afternoon with risk of a thunderstorm. High 26. Humidex 34. Uv index 4 or moderate. Thursday Night: Cloudy with 60 percent chance of showers. Low 18. Friday: A mix of sun and cloud with 30 percent chance of showers. High 26. Friday Night: Clear. Low 16. Saturday: Sunny. High 26. Saturday Night: Clear. Low 16. Sunday: Sunny. High 27. Sunday Night: Cloudy periods with 30 percent chance of showers. Low 18. Monday: Cloudy with 30 percent chance of showers. High 29. Monday Night: Cloudy with 30 percent chance of showers. Low 18. Tuesday: A mix of sun and cloud. High 29. |
regional radar

■ Cornwall
Rain Snow Ice Mix















