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| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 0500 ET Tue Nov 10 2026 |
| Today: Mainly cloudy. 40 percent chance of showers late this morning and this afternoon. Wind becoming west 20 km/h gusting to 40 this morning. High 11. Uv index 2 or low. Tonight: Cloudy. 40 percent chance of showers this evening and after midnight. Wind northwest 20 km/h becoming light this evening. Low plus 2. Wednesday: Cloudy. Becoming a mix of sun and cloud late in the afternoon. High 7. Uv index 1 or low. Wednesday Night: Cloudy with 40 percent chance of rain showers or flurries. Low plus 2. Thursday: Cloudy with 40 percent chance of rain showers or flurries. High plus 2. Thursday Night: Cloudy with 30 percent chance of rain showers or flurries. Low plus 1. Friday: Cloudy. High plus 2. Friday Night: Cloudy. Low zero. Saturday: Cloudy. High plus 3. Saturday Night: Cloudy periods. Low minus 1. Sunday: A mix of sun and cloud. High plus 4. Sunday Night: Cloudy periods. Low minus 3. Monday: A mix of sun and cloud. High plus 3. |
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