Brockville — Today, mainly sunny. Increasing cloudiness early this afternoon. Wind up to 15 km/h. High minus 2°C. Wind chill minus 15 this morning and minus 4 this afternoon. UV index 2 or low.
Tonight, partly cloudy. 40 percent chance of flurries overnight. Wind up to 15 km/h. Low minus 9°C. Wind chill minus 7 this evening and minus 12 overnight.
Friday, mainly cloudy. 40 percent chance of flurries in the morning. Wind up to 15 km/h. High plus 2°C. Wind chill minus 9 in the morning.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Monday, September 14, 2026