May in Red Deer averages a daily high of 17.1°C with nights around 2.7°C. Expect roughly 8.8 wet days totalling 43.8mm. Generally workable, with some weather to plan around.
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 May data.