Brockville — Today, sunny, increasing cloudiness near noon. The wind is becoming west 20 km/h this morning. High minus 7°C. Wind chill is minus 20 this morning and minus 10 this afternoon. UV index is 1 or low.
Tonight, mainly cloudy with a 60 percent chance of flurries. Wind becoming northwest 20 km/h after midnight. Low minus 17°C. Wind chill is minus 10 this evening and minus 26 overnight.
Thursday, New Year’s Day, sunny. Wind northwest 20 km/h, becoming light early in the morning. High minus 12°C. Wind chill is minus 26 in the morning and minus 18 in the afternoon. UV index is 1 or low.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Tuesday, September 1, 2026