Climate almanac
Salem
Illinois, United States · 38.63°, -88.95°
What is the weather like in Salem in September?
In September, Salem is typically 82°F (28°C) during the day and 62°F (16°C) at night. The month brings about 3.1 in (79 mm) of precipitation in total.
- Average high82°F (28°C)
- Average low62°F (16°C)
- Precipitation3.1 in (79 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)