forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1500 utc May 22 2026 |
| Today: Sunny. High 19. Uv index 8 or very high. Tonight: Clear. Low 6. Saturday: Sunny. Wind becoming northeast 30 km/h in the morning then southeast 20 in the afternoon. High 21. Uv index 8 or very high. Saturday Night: Showers. Low 10. Sunday: Showers. High 14. Sunday Night: Cloudy with 40 percent chance of showers. Low 13. Monday: Cloudy with 40 percent chance of showers. High 19. Monday Night: Cloudy periods with 30 percent chance of showers. Low 11. Tuesday: A mix of sun and cloud with 30 percent chance of showers. High 24. Tuesday Night: Cloudy periods with 30 percent chance of showers. Low 13. Wednesday: A mix of sun and cloud. High 25. Wednesday Night: Cloudy periods. Low 12. Thursday: A mix of sun and cloud. High 23. |
























