Climate almanac
San Dimas
California, United States · 34.11°, -117.81°
What is the weather like in San Dimas in December?
In December, San Dimas is typically 66°F (19°C) during the day and 46°F (8°C) at night. The month brings about 2.9 in (73 mm) of precipitation in total.
- Average high66°F (19°C)
- Average low46°F (8°C)
- Precipitation2.9 in (73 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)