Climate almanac
Sioux Falls
South Dakota, United States · 43.54°, -96.73°
What is the weather like in Sioux Falls in September?
In September, Sioux Falls is typically 78°F (26°C) during the day and 56°F (13°C) at night. The month brings about 3.0 in (76 mm) of precipitation in total.
- Average high78°F (26°C)
- Average low56°F (13°C)
- Precipitation3.0 in (76 mm)
- Clear or mostly clear days17
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)