Climate almanac
Happy Valley
Oregon, United States · 45.45°, -122.53°
What is the weather like in Happy Valley in December?
In December, Happy Valley is typically 47°F (8°C) during the day and 37°F (3°C) at night. The month brings about 10 in (262 mm) of precipitation in total. Snowfall averages about 3.5 in (90 mm) over the month.
- Average high47°F (8°C)
- Average low37°F (3°C)
- Precipitation10 in (262 mm)
- Clear or mostly clear days3
- Snowfall3.5 in (90 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)