Climate almanac
Vernon Hills
Illinois, United States · 42.22°, -87.98°
What is the weather like in Vernon Hills in September?
In September, Vernon Hills is typically 74°F (24°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 high74°F (24°C)
- Average low61°F (16°C)
- Precipitation3.0 in (76 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)