Brockville — Today, sunny. High 25°C. Humidex 27. UV index 8 or very high.
Tonight, clear, increasing cloudiness late this evening then 60 percent chance of showers before morning. Risk of a thunderstorm before morning. Low 17°C.
Saturday, mainly cloudy with 60 percent chance of showers and risk of a thunderstorm. Local smoke. Wind becoming southwest 20 km/h in the morning. High 25°C. Humidex 32. UV index 6 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Saturday, October 10, 2026