Climate almanac
Bay City
Michigan, United States · 43.59°, -83.89°
What is the weather like in Bay City in September?
In September, Bay City is typically 75°F (24°C) during the day and 55°F (13°C) at night. The month brings about 2.9 in (73 mm) of precipitation in total.
- Average high75°F (24°C)
- Average low55°F (13°C)
- Precipitation2.9 in (73 mm)
- Clear or mostly clear days12
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)