Brockville — Today, a mix of sun and cloud, becoming cloudy near noon with 40 percent chance of showers late this afternoon. Wind northwest 20 km/h gusting to 40. High 21°C. UV index 7 or high.
Tonight, cloudy, becoming partly cloudy this evening. Fog patches developing overnight. Wind northwest 20 km/h becoming light late this evening. Low 12°C.
Thursday, sunny, becoming a mix of sun and cloud in the afternoon. Fog patches dissipating in the morning. Wind becoming west 20 km/h near noon. High 24°C. Humidex 27. UV index 7 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Tuesday, September 1, 2026