Climate almanac
Alum Rock
California, United States · 37.37°, -121.83°
What is the weather like in Alum Rock in January?
In January, Alum Rock is typically 58°F (14°C) during the day and 42°F (6°C) at night. The month brings about 5.3 in (136 mm) of precipitation in total.
- Average high58°F (14°C)
- Average low42°F (6°C)
- Precipitation5.3 in (136 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)