Climate almanac
San Mateo
California, United States · 37.56°, -122.33°
What is the weather like in San Mateo in January?
In January, San Mateo is typically 59°F (15°C) during the day and 47°F (8°C) at night. The month brings about 4.5 in (114 mm) of precipitation in total.
- Average high59°F (15°C)
- Average low47°F (8°C)
- Precipitation4.5 in (114 mm)
- Clear or mostly clear days7
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)