Climate almanac
San Diego
California, United States · 32.72°, -117.16°
What is the weather like in San Diego in December?
In December, San Diego is typically 64°F (18°C) during the day and 54°F (12°C) at night. The month brings about 1.9 in (49 mm) of precipitation in total.
- Average high64°F (18°C)
- Average low54°F (12°C)
- Precipitation1.9 in (49 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)