Climate almanac
East Alton
Illinois, United States · 38.88°, -90.11°
What is the weather like in East Alton in September?
In September, East Alton is typically 82°F (28°C) during the day and 61°F (16°C) at night. The month brings about 3.0 in (76 mm) of precipitation in total.
- Average high82°F (28°C)
- Average low61°F (16°C)
- Precipitation3.0 in (76 mm)
- Clear or mostly clear days16
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)