Owen Sound residents can expect a mix of showers, gusty winds, and rising temperatures this week before conditions settle into sunny, above-normal weather by Wednesday, September 16, 2026, according to Environment Canada.
Tuesday, September 15, will be the warmest day of the week with a forecast high of 25°C and a humidex of 30, but it will also bring strong southwest winds gusting to 70 km/h and a 40 percent chance of showers with a risk of thunderstorms in the afternoon. A Strong Wind Warning is in effect for Southern Georgian Bay, where winds are expected to reach about 45 km/h Tuesday afternoon and waves may build to 1.5 metres.
Current conditions in Owen Sound on Monday, September 14, were mainly sunny with a temperature of 16.4°C, recorded at Wiarton Airport. No weather alerts were in effect at that time.
Clearing is expected by Wednesday, September 16, with sunny skies and a high of 22°C, which is above the historical September normal of 19°C. Environment Canada forecasts an overnight low of 10°C.
Residents should plan for variable conditions early in the week and secure loose outdoor items ahead of Tuesday’s strong winds.
