Brockville — Today, mainly sunny. Wind becoming west 20 km/h this afternoon. High 27°C. UV index 8 or very high.
Tonight, a few clouds. Wind west 20 km/h becoming light this evening. Low 12°C.
Thursday, a mix of sun and cloud. Wind becoming southwest 20 km/h in the afternoon. High 27°C. Humidex 29. UV index 8 or very high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Monday, September 14, 2026