Heat Warning Continues for Brockville, Leeds-Grenville! Dangerously hot and humid conditions continue through today.

Brockville — Today is sunny with increasing cloudiness near noon and a 40 percent chance of showers this afternoon. There is a risk of a thunderstorm this afternoon. The wind is west 20 km/h, gusting to 40, becoming light late this afternoon. The high is 33. Humidex is 42. The UV index is 10 or very high.
Tonight will be cloudy, with a 40 percent chance of showers early this evening and a risk of a thunderstorm. It will clear overnight. The low will be 19.

Wednesday will be sunny. Wind is becoming north 20 km/h late in the afternoon. High 28. Humidex 33. UV index 10 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