Climate almanac
Union Gap
Washington, United States · 46.56°, -120.48°
What is the weather like in Union Gap in December?
In December, Union Gap is typically 40°F (4°C) during the day and 28°F (-2°C) at night. The month brings about 3.0 in (77 mm) of precipitation in total. Snowfall averages about 5.7 in (145 mm) over the month.
- Average high40°F (4°C)
- Average low28°F (-2°C)
- Precipitation3.0 in (77 mm)
- Clear or mostly clear days3
- Snowfall5.7 in (145 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)