Sioux Falls

What is the climate like in Sioux Falls?

The best time to visit Sioux Falls is typically June – September, with trip comfort peaking in September (7.3/10). Sioux Falls is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 13°F (-11°C). The wettest month is typically May and the driest is February; the year sees roughly 31 in (800 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in September (7.3/10)
• Warmest monthJuly — average high 85°F (29°C)
• Coolest monthJanuary — average low 13°F (-11°C)
• Wettest monthMay (4.4 in (112 mm))
• Driest monthFebruary (0.9 in (23 mm))
• Annual precipitation31 in (800 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSioux Falls, 5 km away (1932-2026)