forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1100 ET Wed Jun 24 2026 |
| Today: Mainly sunny. Wind west 20 km/h gusting to 40. High 26. Humidex 29. Uv index 7 or high. Tonight: Mainly cloudy. Clearing late this evening. Wind west 20 km/h gusting to 40 becoming light this evening. Low 14. Thursday: Mainly sunny. Increasing cloudiness in the morning then 40 percent chance of showers in the afternoon. Risk of a thunderstorm in the afternoon. High 21. Uv index 8 or very high. Thursday Night: Cloudy with 60 percent chance of showers. Low 14. Friday: Cloudy with 30 percent chance of showers. High 24. Friday Night: Cloudy. Low 14. Saturday: Clearing. High 26. Saturday Night: Clear. Low 14. Sunday: Sunny. High 28. Sunday Night: Cloudy periods. Low 17. Monday: A mix of sun and cloud with 30 percent chance of showers. High 29. Monday Night: Cloudy periods with 30 percent chance of showers. Low 19. Tuesday: Cloudy with 30 percent chance of showers. High 29. |
regional radar

Cornwall
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