Climate almanac
Mandan
North Dakota, United States · 46.83°, -100.89°
What is the climate like in Mandan?
The best time to visit Mandan is typically May – September, with trip comfort peaking in August (7.8/10). Mandan is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 9°F (-13°C). The wettest month is typically May and the driest is January; the year sees roughly 21 in (526 mm) of precipitation.
- Best time to visitMay – September — comfort peaks in August (7.8/10)
- Warmest monthJuly — average high 85°F (29°C)
- Coolest monthJanuary — average low 9°F (-13°C)
- Wettest monthMay (2.9 in (75 mm))
- Driest monthJanuary (0.5 in (13 mm))
- Annual precipitation21 in (526 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromMandan Exp Stn, 2 km away (1913-2026)