Climate almanac
Union
South Carolina, United States · 34.72°, -81.62°
What is the weather like in Union in September?
In September, Union is typically 84°F (29°C) during the day and 66°F (19°C) at night. The month brings about 4.0 in (101 mm) of precipitation in total.
- Average high84°F (29°C)
- Average low66°F (19°C)
- Precipitation4.0 in (101 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)