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 37. UV index 8 or very high.
Tonight, partly cloudy with 60 percent chance of showers and risk of a thunderstorm. Low 18°C.
Tuesday, cloudy with 70 percent chance of showers and risk of a thunderstorm. Wind becoming south 20 km/h in the afternoon. High 24°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 24, 2026