Brockville — Today is sunny. Wind becoming southwest 20 km/h gusting to 40 near noon. High 32. Humidex 40. UV index 9 or very high.
Tonight, a few clouds. Wind southwest 20 km/h gusting to 40, becoming light late this evening. Low 21.
Tuesday will be a mix of sun and clouds. Clearing near noon. High 31. Humidex 37. UV index 9 or very high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Tuesday, September 1, 2026