Good Morning, Brockville, Leeds-Grenville! Local Morning Weather Update – Wednesday, August 13, 2025

HEAT WARNING continues for our region, ending later today! Daytime highs of 32 to 35 degrees Celsius, with humidex values of 37 to 42. Overnight lows of 20 to 23 degrees Celsius.

Brockville — Today, a few showers ending near noon, then mainly cloudy with a 30 percent chance of showers. Risk of a thunderstorm. High 30. Humidex 39. UV index 8 or very high.

Tonight, mainly cloudy. 40 percent chance of showers this evening with risk of a thunderstorm. Low 19.

Thursday, a mix of sun and clouds. 30 percent chance of showers late in the morning and early afternoon. High 28. Humidex 33. UV index 7 or high.

Your 5-day local forecast: