April in Calgary averages a daily high of 10.4°C with nights around -2.2°C. Expect roughly 7.2 wet days totalling 24.3mm. Demanding conditions — pack for it and plan indoor options.
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 April data.