Brockville — Today, a mix of sun and cloud. 30 percent chance of showers this afternoon with risk of a thunderstorm. Fog patches dissipating this morning. High 29°C. Humidex 36. UV index 8 or very high.
Tonight, mainly cloudy with 30 percent chance of showers and risk of a thunderstorm. Low 19°C.
Saturday, cloudy with 60 percent chance of showers and risk of a thunderstorm. High 27°C. Humidex 35. UV index 6 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Friday, October 16, 2026