Brockville — Today, sunny. Fog patches dissipating this morning. High 28°C. Humidex 33. UV index 8 or very high.
Tonight, increasing cloudiness this evening. Fog patches developing overnight. Low 18°C.
Thursday, a mix of sun and cloud. 60 percent chance of showers in the afternoon with risk of a thunderstorm. Fog patches dissipating in the morning. High 29°C. Humidex 38. UV index 7 or high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Tuesday, September 1, 2026