Climate almanac
Johnsburg
Illinois, United States · 42.38°, -88.24°
What is the weather like in Johnsburg in August?
In August, Johnsburg is typically 81°F (27°C) during the day and 64°F (18°C) at night. The month brings about 3.4 in (86 mm) of precipitation in total.
- Average high81°F (27°C)
- Average low64°F (18°C)
- Precipitation3.4 in (86 mm)
- Clear or mostly clear days12
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)