Climate almanac
Vacaville
California, United States · 38.36°, -121.99°
What is the weather like in Vacaville in September?
In September, Vacaville is typically 87°F (30°C) during the day and 58°F (14°C) at night. The month brings about 0.2 in (4 mm) of precipitation in total.
- Average high87°F (30°C)
- Average low58°F (14°C)
- Precipitation0.2 in (4 mm)
- Clear or mostly clear days24
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)