Climate almanac
Marshalltown
Iowa, United States · 42.05°, -92.91°
What is the weather like in Marshalltown in September?
In September, Marshalltown is typically 79°F (26°C) during the day and 58°F (14°C) at night. The month brings about 3.6 in (92 mm) of precipitation in total.
- Average high79°F (26°C)
- Average low58°F (14°C)
- Precipitation3.6 in (92 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)