
Brockville — Today, mainly cloudy with 30 percent chance of showers. Wind west 30 km/h gusting to 50. High 29°C. Humidex 36. UV index 8 or very high.
Tonight, mainly cloudy. 70 percent chance of showers changing to 30 percent chance of showers after midnight. Risk of a thunderstorm this evening and after midnight. Wind west 30 km/h gusting to 50. Low 18°C.

Wednesday, cloudy with 30 percent chance of showers early in the morning. Clearing in the morning. High 24°C. UV index 9 or very high.
Your 5-day local forecast:




More Stories
Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Sunday, November 1, 2026
VIDEO Highlights: Tikis Back on Track After Winning 5-2 Over the Perth Blue Wings Friday Night in EOJHL
Tonight’s Halloween Forecast as of 4:00pm october 31, 2026