Climate almanac
Alum Rock
California, United States · 37.37°, -121.83°
What is the weather like in Alum Rock in December?
In December, Alum Rock is typically 58°F (15°C) during the day and 42°F (5°C) at night. The month brings about 4.1 in (104 mm) of precipitation in total.
- Average high58°F (15°C)
- Average low42°F (5°C)
- Precipitation4.1 in (104 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)