Climate almanac
Sumter
South Carolina, United States · 33.92°, -80.34°
What is the weather like in Sumter in December?
In December, Sumter is typically 60°F (16°C) during the day and 42°F (5°C) at night. The month brings about 4.4 in (113 mm) of precipitation in total.
- Average high60°F (16°C)
- Average low42°F (5°C)
- Precipitation4.4 in (113 mm)
- Clear or mostly clear days12
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)