September in Red Deer averages a daily high of 18°C with nights around 3.1°C. Expect roughly 8.1 wet days totalling 27.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Red Deer is May–September.
Based on LACOMBE CDA 2, AB CA (20.7km), 1995–2024. 29 years of September data.