Brockville — Today, sunny, increasing cloudiness this afternoon then 40 percent chance of showers late this afternoon. Wind becoming southwest 20 km/h gusting to 40 this morning. High 16°C. UV index 6 or high.
Tonight, mainly cloudy with 60 percent chance of showers. Wind southwest 20 km/h gusting to 40 becoming light overnight. Low plus 3°C.
Friday, mainly cloudy with 40 percent chance of showers early in the morning. Periods of rain beginning in the morning. High 8°C. UV index 2 or low.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Monday, September 14, 2026