Whitchurch-Stouffville residents should brace for a wet and humid week as Environment Canada has issued a Special Weather Statement for the area. Showers and embedded thunderstorms are expected to begin the evening of August 31, 2026, and continue into Tuesday morning, bringing local rainfall amounts of 20 to 40 mm, with some areas possibly seeing more than 40 mm.
The unsettled weather is part of a broader pattern that will see temperatures climb to 27°C by midweek, with humidity making it feel closer to 29 to 35°C. On Tuesday, the humidex is forecast to reach 35. Residents should plan for wet commutes and stay alert for changing conditions, as water will likely pool on roads and in low-lying areas. Rainfall warnings may be issued if conditions intensify.
Conservation authorities are advising caution around waterways. The town is served by the Lake Simcoe Region Conservation Authority in the north and the Toronto and Region Conservation Authority in the south. Both agencies recommend avoiding flooded roads and staying away from fast-moving water.
Current conditions at 5:00 PM EDT show a temperature of 19.3°C with 99% humidity and light southeast winds. The heavy rain is expected to taper off Tuesday morning, but showers will remain a possibility through the week. Residents are encouraged to monitor local forecasts and adjust outdoor plans accordingly.
