Brockville — Today, a mix of sun and cloud. 40 percent chance of showers late this afternoon with risk of a thunderstorm. Fog patches dissipating early this morning. High 28°C. Humidex 34. UV index 8 or very high.
Tonight, partly cloudy. 40 percent chance of showers this evening with risk of a thunderstorm. Low 16°C.
Saturday, sunny. High 27°C. Humidex 30. UV index 7 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Sunday, October 25, 2026