Brockville — Today, cloudy. 40 percent chance of drizzle early this morning. Becoming a mix of sun and cloud this afternoon. High 26. Humidex 33. UV index 8 or very high.
Tonight, partly cloudy. Low 16.
Wednesday, a mix of sun and cloud. 30 percent chance of showers in the afternoon. High 27. Humidex 32. 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