Climate almanac
Spring Valley
Illinois, United States · 41.33°, -89.20°
What is the weather like in Spring Valley in September?
In September, Spring Valley is typically 80°F (26°C) during the day and 59°F (15°C) at night. The month brings about 2.7 in (69 mm) of precipitation in total.
- Average high80°F (26°C)
- Average low59°F (15°C)
- Precipitation2.7 in (69 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)