Climate almanac
Johnsburg
Illinois, United States · 42.38°, -88.24°
What is the weather like in Johnsburg in September?
In September, Johnsburg is typically 75°F (24°C) during the day and 58°F (15°C) at night. The month brings about 3.2 in (82 mm) of precipitation in total.
- Average high75°F (24°C)
- Average low58°F (15°C)
- Precipitation3.2 in (82 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)