Climate almanac
Mason City
Iowa, United States · 43.15°, -93.20°
What is the weather like in Mason City in September?
In September, Mason City is typically 76°F (25°C) during the day and 56°F (13°C) at night. The month brings about 3.7 in (93 mm) of precipitation in total.
- Average high76°F (25°C)
- Average low56°F (13°C)
- Precipitation3.7 in (93 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)