Climate almanac
San Francisco
Heredia Province, Costa Rica · 9.99°, -84.13°
What is the weather like in San Francisco in December?
In December, San Francisco is typically 76°F (24°C) during the day and 63°F (17°C) at night. The month brings about 3.0 in (77 mm) of precipitation in total.
- Average high76°F (24°C)
- Average low63°F (17°C)
- Precipitation3.0 in (77 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)