Brockville — Today, cloudy with a 30 percent chance of showers or drizzle this morning and early this afternoon. High 24. Humidex 28. UV index 6 or high.
Tonight, partly cloudy. Clearing before morning. Low 12.
Thursday, mainly sunny. Wind is becoming northeast 20 km/h late in the morning. High 27. Humidex 28. 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