forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1530 ET Mon Aug 3 2026 |
| Tonight: Partly cloudy with 40 percent chance of showers this evening. Clearing late this evening. Fog patches developing overnight. Wind west 30 km/h gusting to 50 becoming light this evening. Low 13. Tuesday: Sunny. Fog patches dissipating in the morning. High 27. Humidex 31. Uv index 8 or very high. Tuesday Night: Clear. Low 16. Wednesday: Sunny. High 28. Wednesday Night: Clear. Low 17. Thursday: Cloudy with 40 percent chance of showers. High 25. Thursday Night: Cloudy with 40 percent chance of showers. Low 21. Friday: Cloudy with 30 percent chance of showers. High 26. Friday Night: Cloudy periods. Low 18. Saturday: A mix of sun and cloud with 40 percent chance of showers. High 29. Saturday Night: Cloudy periods. Low 18. Sunday: A mix of sun and cloud with 40 percent chance of showers. High 28. |
regional radar

■ Cornwall
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