Brockville — Today, cloudy, showers beginning this morning. Risk of a thunderstorm late this morning. High 18°C. UV index 3 or moderate.
Tonight, cloudy, 40 percent chance of showers early this evening. Low 9°C.
Wednesday, overcast. Wind becoming southwest 20 km/h near noon. High 15°C. UV index 5 or moderate.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Monday, September 14, 2026