Climate almanac
Altadena
California, United States · 34.19°, -118.13°
What is the weather like in Altadena in January?
In January, Altadena is typically 64°F (18°C) during the day and 45°F (7°C) at night. The month brings about 3.5 in (90 mm) of precipitation in total.
- Average high64°F (18°C)
- Average low45°F (7°C)
- Precipitation3.5 in (90 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)