Climate almanac
Sunnyside
Washington, United States · 46.32°, -120.01°
What is the weather like in Sunnyside in December?
In December, Sunnyside is typically 41°F (5°C) during the day and 29°F (-1°C) at night. The month brings about 1.9 in (48 mm) of precipitation in total. Snowfall averages about 2.7 in (68 mm) over the month.
- Average high41°F (5°C)
- Average low29°F (-1°C)
- Precipitation1.9 in (48 mm)
- Clear or mostly clear days4
- Snowfall2.7 in (68 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)