June in Bismarck averages a daily high of 26°C with nights around 11.9°C. Expect roughly 11.4 wet days totalling 82.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Bismarck is May.
Based on BISMARCK MUNICIPAL AIRPORT, ND US (4.5km), 1995–2024. 30 years of June data.