forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1621 ET Fri Aug 21 2026 |
| Tonight: Clear. Low 12. Saturday: Sunny in the morning and early in the afternoon then a mix of sun and cloud with 30 percent chance of showers late in the afternoon. High 27. Humidex 34. Uv index 7 or high. Saturday Night: Partly cloudy with 40 percent chance of showers. Low 16. Sunday: Showers. High 24. Sunday Night: Cloudy with 60 percent chance of showers. Low 14. Monday: A mix of sun and cloud with 60 percent chance of showers. High 22. Monday Night: Cloudy periods with 60 percent chance of showers. Low 12. Tuesday: Cloudy with 40 percent chance of showers. High 22. Tuesday Night: Clear. Low 13. Wednesday: A mix of sun and cloud. High 23. Wednesday Night: Cloudy with 30 percent chance of showers. Low 17. Thursday: Cloudy with 30 percent chance of showers. High 23. |
regional radar

■ Cornwall
Rain Snow Ice Mix














