
HEAT WARNING: A multi-day period of heat and humidity continues today for our region! Ending tonight!
Brockville — Today is sunny. Wind northwest 20 km/h becoming light late this morning. High 31. Humidex 38. UV index 9 or very high.
Tonight, a few clouds. Increasing cloudiness before morning. Low 19.

Tuesday will be mainly cloudy with a 40 percent chance of showers and a risk of a thunderstorm. Wind is becoming northwest 20 km/h near noon. High 28. Humidex 32. UV index 8 or very high.
Your 5-day local forecast:




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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Sunday, October 25, 2026