Climate almanac
Hayward
California, United States · 37.67°, -122.08°
What is the weather like in Hayward in September?
In September, Hayward is typically 82°F (28°C) during the day and 57°F (14°C) at night. The month brings about 0.1 in (4 mm) of precipitation in total.
- Average high82°F (28°C)
- Average low57°F (14°C)
- Precipitation0.1 in (4 mm)
- Clear or mostly clear days22
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)