Bismarck

What is the climate like in Bismarck?

The best time to visit Bismarck is typically May – September, with trip comfort peaking in August (7.7/10). Bismarck is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 8°F (-13°C). The wettest month is typically May and the driest is January; the year sees roughly 21 in (524 mm) of precipitation.

• Best time to visitMay – September — comfort peaks in August (7.7/10)
• Warmest monthJuly — average high 85°F (29°C)
• Coolest monthJanuary — average low 8°F (-13°C)
• Wettest monthMay (2.8 in (72 mm))
• Driest monthJanuary (0.5 in (13 mm))
• Annual precipitation21 in (524 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromMandan Exp Stn, 10 km away (1913-2026)