Mississippi Mills residents can expect unsettled weather over the coming days, with a risk of thunderstorms Monday and showers at times through Thursday, according to Environment Canada. No weather alerts are currently in effect from Environment Canada, but conditions are being monitored.
As of 2:00 PM EDT on Monday, August 24, 2026, the area was mostly cloudy with a temperature of 20.1°C and humidity at 69%. Winds from the south were gusting to 31 km/h. The forecast for the remainder of Monday includes a 30 percent chance of showers early in the afternoon, with showers becoming more likely later and a risk of a thunderstorm late in the afternoon. The high is expected to reach 20°C.
Environment Canada’s official outlook for Thursday, August 27 calls for cloudy skies with a 40 percent chance of showers and a high of 24°C. The Weather Network, by contrast, points to Thursday as the highest thunderstorm risk of the week, with a 60 percent chance in the morning and 70 percent in the afternoon, and roughly 5 mm of rain possible. Temperatures this week will range from a low of 9°C overnight Friday to a high of 25°C on Wednesday. Humidex values could make it feel like 29°C, so it will feel warmer than the actual temperature.
Outdoor plans may be affected, especially during afternoon hours when showers or thunderstorms are most likely. Conditions are expected to improve heading into the weekend: Saturday brings a mix of sun and cloud, while Sunday carries a 30 percent chance of showers with cloudy periods.
Residents are encouraged to report severe weather to Environment Canada by emailing [email protected] or using #ONStorm on social media.
