
Brockville — Today, mainly cloudy. There is a 40% chance of showers this afternoon, with a risk of a thunderstorm. Fog patches are dissipating this morning. High 27. Humidex 35. UV index 8 or very high.
Tonight, mainly cloudy with a 60 percent chance of showers and a risk of a thunderstorm. Fog patches are developing after midnight. Low 17.

Thursday, a mix of sun and cloud with a 60 percent chance of showers and a risk of a thunderstorm. Fog patches are dissipating in the morning. High 26. Humidex 34. UV index 8 or very high.
Your 5-day local forecast:




More Stories
Y Communities Thrive: YMCA of Eastern Ontario Launches 2026 Annual Campaign
Good Morning, Brockville, Leeds-Grenville! Local Morning Weather Update – Thursday, April 23, 2026
Annual Prescott Spring Home & Trade Show Begins Thursday at the Leo