forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc Jun 01 2026 |
| Today: Sunny near noon then a mix of sun and cloud with 40 percent chance of showers late this afternoon. Risk of a thunderstorm late this afternoon. High 20. Uv index 6 or high. Tonight: Partly cloudy. 40 percent chance of showers early this evening with risk of a thunderstorm. Low 7. Tuesday: Sunny. Wind becoming northwest 20 km/h gusting to 40 late in the morning. High 21. Uv index 7 or high. Tuesday Night: Clear. Low 7. Wednesday: Sunny. High 29. Wednesday Night: Clear. Low 14. Thursday: Sunny. High 30. Thursday Night: Cloudy periods. Low 16. Friday: A mix of sun and cloud. High 23. Friday Night: Cloudy periods with 40 percent chance of showers. Low 15. Saturday: Cloudy with 40 percent chance of showers. High 25. Saturday Night: Cloudy periods. Low 14. Sunday: Sunny. High 27. |
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