Climate almanac
Petaluma
California, United States · 38.23°, -122.64°
What is the weather like in Petaluma in January?
In January, Petaluma is typically 58°F (14°C) during the day and 44°F (6°C) at night. The month brings about 6.0 in (151 mm) of precipitation in total.
- Average high58°F (14°C)
- Average low44°F (6°C)
- Precipitation6.0 in (151 mm)
- Clear or mostly clear days7
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)