forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc May 26 2026 |
| Today: Sunny. Wind southwest 20 km/h gusting to 40 increasing to 40 gusting to 60 this afternoon. High 27. Humidex 31. Uv index 7 or high. Tonight: Clear. Becoming partly cloudy this evening. Wind southwest 40 km/h gusting to 60 diminishing to 20 gusting to 40 this evening then becoming light after midnight. Low 15. Wednesday: Clearing in the morning. High 25. Humidex 26. Uv index 8 or very high. Wednesday Night: Cloudy with 30 percent chance of showers. Low 11. Thursday: A mix of sun and cloud. High 21. Thursday Night: Cloudy periods. Low 10. Friday: A mix of sun and cloud with 40 percent chance of showers. High 20. Friday Night: Cloudy periods with 60 percent chance of showers. Low 10. Saturday: Cloudy with 30 percent chance of showers. High 19. Saturday Night: Cloudy with 30 percent chance of showers. Low 9. Sunday: A mix of sun and cloud. High 19. Sunday Night: Cloudy periods. Low 9. Monday: A mix of sun and cloud. High 19. |
























