October in Calgary averages a daily high of 11.5°C with nights around -1.3°C. Expect roughly 6.2 wet days totalling 19.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Calgary is June–September.
Based on CALGARY INTERNATIONAL CS, AB CA (8.8km), 1995–2024. 24 years of October data.