Good Morning, Brockville, Leeds-Grenville! Local Morning Weather Update – Sunday, June 21, 2026

Brockville — Today, mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this afternoon. Wind becoming west 20 km/h late this afternoon. High 24°C. Humidex 27. UV index 5 or moderate.

Tonight, partly cloudy with 60 percent chance of showers early this evening with risk of a thunderstorm. Wind west 20 km/h becoming light this evening. Low 13°C.

Monday, increasing cloudiness with 30 percent chance of showers in the afternoon. Wind becoming south 20 km/h late in the morning. High 23°C. Humidex 26. UV index 8 or very high.

Your 5-day local forecast: