forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Sat Jul 25 2026 |
| Tonight: Clear. Becoming partly cloudy after midnight. Low 17. Sunday: A mix of sun and cloud. 40 percent chance of showers late in the afternoon with risk of a thunderstorm. High 27. Humidex 35. Uv index 7 or high. Sunday Night: Mainly cloudy with 40 percent chance of showers and risk of a thunderstorm. Low 18. Monday: A mix of sun and cloud with 40 percent chance of showers. High 28. Monday Night: Cloudy with 30 percent chance of showers. Low 17. Tuesday: Cloudy with 40 percent chance of showers. High 26. Tuesday Night: Cloudy with 40 percent chance of showers. Low 16. Wednesday: Cloudy with 30 percent chance of showers. High 24. Wednesday Night: Cloudy periods with 30 percent chance of showers. Low 17. Thursday: A mix of sun and cloud with 30 percent chance of showers. High 25. Thursday Night: Cloudy periods. Low 17. Friday: A mix of sun and cloud. High 26. |
regional radar

■ Cornwall
Rain Snow Ice Mix














