UPDATED: Wednesday, June 17, 2026 as of 11:50 AM!
Brockville — Today, a mix of sun and cloud with 60 percent chance of showers and risk of a thunderstorm. Wind becoming southwest 20 km/h this afternoon. High 24°C. Humidex 27. UV index 8 or very high.
Tonight, partly cloudy. 40 percent chance of showers early this evening. Showers beginning overnight. Risk of a thunderstorm overnight. Local amount 5 to 10 mm. Wind becoming southeast 20 km/h before morning. Low 15°C.
Thursday, showers ending late in the morning then mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm in the morning and early in the afternoon. Local amount 10 to 15 mm. Wind southeast 20 km/h gusting to 50 becoming southwest 40 gusting to 70 late in the morning. High 23°C. Humidex 27. UV index 7 or high.
Your 5-day local forecast:
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