forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc Jun 15 2026 |
| Today: A mix of sun and cloud. Wind west 20 km/h gusting to 40. High 21. Uv index 8 or very high. Tonight: Partly cloudy. Wind southwest 30 km/h becoming light late this evening. Wind becoming southwest 20 before morning. Low 11. Tuesday: A mix of sun and cloud. Wind southwest 30 km/h. High 22. Uv index 7 or high. Tuesday Night: Cloudy periods. Low 14. Wednesday: A mix of sun and cloud with 60 percent chance of showers or thunderstorms. High 23. Wednesday Night: Cloudy. Low 14. Thursday: Showers. High 23. Thursday Night: Cloudy with 40 percent chance of showers. Low 13. Friday: Cloudy with 60 percent chance of showers. High 22. Friday Night: Cloudy with 40 percent chance of showers. Low 13. Saturday: Cloudy with 40 percent chance of showers. High 20. Saturday Night: Cloudy periods with 30 percent chance of showers. Low 11. Sunday: A mix of sun and cloud with 30 percent chance of showers. High 21. |
regional radar

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