YELLOW WARNING – Rainfall: Heavy rainfall continues. Total rainfall amounts of 50 to 80 mm. Local rainfall amounts may approach 100 mm for locations that receive multiple waves of heavy precipitation. Poor visibility in torrential downpours.
Brockville — Today, periods of rain ending near noon then cloudy with 40 percent chance of showers. Risk of a thunderstorm early this morning. Amount 10 to 15 mm. Wind becoming northwest 30 km/h gusting to 50 early this morning. High 24. Humidex 30. UV index 5 or moderate.
Tonight, clear. Fog patches developing overnight. Low 13.
Tuesday, sunny. Fog patches dissipating in the morning. High 27. Humidex 31. UV index 8 or very high.
Your 5-day local forecast:
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Good Morning, Brockville, Leeds-Grenville! Local Weather Update – Sunday, August 2, 2026