Brockville — Today, cloudy with 40 percent chance of showers this morning. Showers beginning near noon. Risk of a thunderstorm this afternoon. Fog patches dissipating late this morning. High 17°C. UV index 5 or moderate.
Tonight, cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Wind becoming north 20 km/h after midnight. Low 9°C.
Friday, Overcast. High 18°C. UV index 4 or moderate.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Morning Weather Update – Saturday, July 18, 2026