forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1100 ET Sun Jun 28 2026 |
| Today: Sunny. High 29. Humidex 31. Uv index 8 or very high. Tonight: Clear. Fog patches developing after midnight. Low 14. Monday: Sunny. Fog patches dissipating in the morning. High 30. Humidex 33. Uv index 9 or very high. Monday Night: Cloudy periods with 30 percent chance of showers. Low 19. Tuesday: Cloudy with 40 percent chance of showers. High 29. Tuesday Night: Cloudy with 30 percent chance of showers. Low 22. Wednesday: A mix of sun and cloud with 30 percent chance of showers. High 33. Wednesday Night: Clear. Low 22. Thursday: A mix of sun and cloud with 30 percent chance of showers. High 33. Thursday Night: Cloudy periods with 30 percent chance of showers. Low 22. Friday: A mix of sun and cloud with 30 percent chance of showers. High 33. Friday Night: Cloudy periods with 30 percent chance of showers. Low 21. Saturday: A mix of sun and cloud. High 30. |
regional radar

Cornwall
Rain Snow Ice Mix















