Climate almanac
Sonoma
California, United States · 38.29°, -122.46°
What is the weather like in Sonoma in September?
In September, Sonoma is typically 81°F (27°C) during the day and 57°F (14°C) at night. The month brings about 0.2 in (5 mm) of precipitation in total.
- Average high81°F (27°C)
- Average low57°F (14°C)
- Precipitation0.2 in (5 mm)
- Clear or mostly clear days23
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)