Brockville — Today, a mix of sun and cloud. 60 percent chance of showers this afternoon with risk of a thunderstorm. Wind becoming southwest 20 km/h late this morning. High 12°C. UV index 6 or high.
Tonight, partly cloudy with a 30 percent chance of showers early this evening with risk of a thunderstorm. Low plus 1°C with risk of frost.
Tuesday, sunny. Wind becoming west 20 km/h late in the morning. High 13°C. UV index 6 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Monday, September 14, 2026