Climate almanac
Clearlake
California, United States · 38.96°, -122.63°
What is the weather like in Clearlake in December?
In December, Clearlake is typically 55°F (13°C) during the day and 40°F (4°C) at night. The month brings about 5.4 in (137 mm) of precipitation in total. Snowfall averages about 0.8 in (19 mm) over the month.
- Average high55°F (13°C)
- Average low40°F (4°C)
- Precipitation5.4 in (137 mm)
- Clear or mostly clear days9
- Snowfall0.8 in (19 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)