YELLOW WARNING – HEAT WARNING: A heat event continues today and continuing into this evening. May continue into Thursday or Friday for areas near Lake Erie and Lake Ontario. Maximum temperatures of 30 to 36 degrees Celsius. Minimum temperatures of 20 to 25 degrees Celsius. Humidex values of 38 to 42.
Brockville — Today, a mix of sun and cloud. 30 percent chance of showers late this afternoon with risk of a thunderstorm. Local smoke early this morning. Wind becoming northwest 20 km/h gusting to 40 near noon. High 29. Humidex 31. UV index 9 or very high.
Tonight, partly cloudy with 30 percent chance of showers early this evening then clear. Risk of a thunderstorm early this evening. Wind northwest 20 km/h gusting to 40 becoming light this evening. Low 18.
Thursday, a mix of sun and cloud. 40 percent chance of showers in the afternoon with risk of a thunderstorm. Wind becoming northwest 20 km/h near noon. High 27. Humidex 30. UV index 8 or very high.
Your 5-day local forecast:
More Stories
196th Delta Fair Set to Take Place July 23rd to 26th, 2026
Stay Cool in Brockville During a Heat Wave
OPSEU Local 441 Sent Formal Request to All Three Agencies to Return to the Bargaining Table