
Brockville – Today is sunny, then there is increasing cloudiness this afternoon, with a 40 percent chance of showers late this afternoon. There is a risk of a thunderstorm late this afternoon. The wind is becoming southwest at 20 km/h this afternoon. Today’s high is 28, and the humidex is 33. The UV index is 9 or very high.
Tonight will be cloudy with a 70 percent chance of showers and a risk of thunderstorms. The wind is southwest at 20 km/h gusting to 40, becoming light this evening, then becoming southwest 30 gusting to 50 late this evening. Tonight’s low is 22.

Sunday is a mix of sun and cloud with a 40 percent chance of showers. A risk of a thunderstorm in the afternoon. Wind west 20 km/h gusting to 4,0 becoming light in the afternoon. Sunday’s high is 32, and the humidex is 42. The UV index is 10 or very high.
Your 5-day local forecast:




More Stories
Scheduled Work Begins This Week, Part of Ongoing Improvements on Brockville Railway Tunnel Lighting
OPP Golden Helmets Performing in Prescott This Saturday, June 6th
The 2026 Shriners Street Fair Begins This Thursday, June 4th running until June 7th in Brockville