Brockville — Today, sunny. Wind becoming southwest 20 km/h this morning. High 26. Humidex 29°C. UV index 8 or very high.
Tonight, clear. Becoming partly cloudy after midnight. Wind southwest 20 km/h. Low 16°C.
Tuesday, a mix of sun and cloud. Becoming cloudy late in the morning with showers. Risk of a thunderstorm in the afternoon. Wind south 20 km/h gusting to 40. High 23°C. Humidex 29. 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