Red Deer residents can expect clear skies and above-normal temperatures through Wednesday, September 23, 2026, according to Environment Canada. The forecast calls for highs of 27°C on Monday, 21°C on Tuesday, and 19°C on Wednesday, compared to the seasonal normal high of 16°C.
Overnight lows near 5°C each night remain cool but stay several degrees above freezing. While frost advisories are typically issued only when temperatures reach the freezing mark, the cool nights are a reminder that Red Deer’s first fall frost usually arrives by mid-September.
The warm and sunny stretch is ideal for outdoor activities, including walks along the more than 110 kilometres of trails in the Waskasoo Park system. City of Red Deer Parks and Recreation Department maintains the trail network along the Red Deer River and Waskasoo Creek valley.
The warm spell ends Thursday, September 24, 2026, as clouds and showers move in. Showers are expected Thursday night, and Friday is expected to bring rain, wind, and a high of only 8°C. Friday night carries a 60 percent chance of showers, with overnight lows dropping to about 2°C.
Residents should enjoy the sunshine while it lasts and consider protecting sensitive plants from the chilly overnight temperatures.
