forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Fri Jul 31 2026 |
| Tonight: Clear. Low 19. Saturday: Mainly cloudy. 30 percent chance of showers in the afternoon. Wind becoming southwest 20 km/h late in the morning. High 27. Humidex 34. Uv index 8 or very high. Saturday Night: Mainly cloudy with 30 percent chance of showers in the evening and after midnight. Showers beginning after midnight. Low 18. Sunday: Rain. High 24. Sunday Night: Periods of rain. Low 15. Monday: A mix of sun and cloud with 40 percent chance of showers. High 26. Monday Night: Clear. Low 15. Tuesday: Sunny. High 27. Tuesday Night: Clear. Low 16. Wednesday: Sunny. High 28. Wednesday Night: Cloudy. Low 18. Thursday: A mix of sun and cloud. High 27. |
regional radar

■ Cornwall
Rain Snow Ice Mix














