Climate almanac
Riverdale
Illinois, United States · 41.63°, -87.63°
What is the weather like in Riverdale in September?
In September, Riverdale is typically 76°F (24°C) during the day and 61°F (16°C) at night. The month brings about 2.8 in (71 mm) of precipitation in total.
- Average high76°F (24°C)
- Average low61°F (16°C)
- Precipitation2.8 in (71 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)