
Brockville — Today, mainly cloudy with a 60 percent chance of showers and a risk of a thunderstorm. Wind southwest 20 km/h gusting to 50, increasing to 40 gusting to 60 this afternoon, then diminishing to 20. High 27. Humidex 35. UV index 8 or very high.
Tonight, partly cloudy. Becoming cloudy after midnight. Wind west 20 km/h becoming light early this evening. Low 16.

Sunday, cloudy. Clearing late in the afternoon. High 29. Humidex 34. UV index 7 or high.
Your 5-day local forecast:




More Stories
Cataraqui Conservation Issues Flood Outlook Statement for Inland Lakes & Streams
Yellow Warning – Rainfall Issued for Brockville, Leeds-Grenville For Tonight Into Saturday
Good Evening, Brockville, Leeds-Grenville! Local Weather Update – Friday, March 6, 2026