forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Thu Jul 23 2026 |
| Tonight: Clear. Wind southwest 20 km/h gusting to 40 becoming light late this evening. Low 13. Friday: Mainly sunny. Wind southwest 20 km/h becoming light in the afternoon. High 27. Humidex 31. Uv index 7 or high. Friday Night: Clear. Becoming partly cloudy before morning. Low 13. Saturday: Sunny. High 29. Saturday Night: Cloudy periods with 30 percent chance of showers. Low 15. Sunday: A mix of sun and cloud with 40 percent chance of showers. High 28. Sunday Night: Cloudy periods. Low 15. Monday: Cloudy with 60 percent chance of showers. High 25. Monday Night: Cloudy with 60 percent chance of showers. Low 18. Tuesday: Cloudy with 60 percent chance of showers. High 25. Tuesday Night: Cloudy. Low 16. Wednesday: Cloudy. High 25. |
regional radar

■ Cornwall
Rain Snow Ice Mix














