Climate almanac
Union
South Carolina, United States · 34.72°, -81.62°
What is the weather like in Union in December?
In December, Union is typically 57°F (14°C) during the day and 39°F (4°C) at night. The month brings about 4.7 in (118 mm) of precipitation in total. Snowfall averages about 0.3 in (8 mm) over the month.
- Average high57°F (14°C)
- Average low39°F (4°C)
- Precipitation4.7 in (118 mm)
- Clear or mostly clear days11
- Snowfall0.3 in (8 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)