Brockville — Today, mainly cloudy. 30 percent chance of showers early this afternoon. A few showers beginning this afternoon. Wind becoming southwest 20 km/h gusting to 50 this morning then northwest 40 gusting to 60 this afternoon. High 20°C. UV index 7 or high.
Tonight, a few showers ending after midnight then cloudy with 40 percent chance of showers. Wind northwest 40 km/h gusting to 70. Low 9°C.
Saturday, cloudy. Becoming a mix of sun and cloud in the morning. Wind north 30 km/h gusting to 50. High 19°C. UV index 6 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Monday, September 14, 2026