August in Calgary averages a daily high of 23.6°C with nights around 9.3°C. Expect roughly 10.2 wet days totalling 46.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Calgary is June–September.
Based on CALGARY INTERNATIONAL CS, AB CA (8.8km), 1995–2024. 22 years of August data.