Climate almanac
Janesville
Wisconsin, United States · 42.68°, -89.02°
What is the weather like in Janesville in August?
In August, Janesville is typically 81°F (27°C) during the day and 63°F (17°C) at night. The month brings about 3.8 in (96 mm) of precipitation in total.
- Average high81°F (27°C)
- Average low63°F (17°C)
- Precipitation3.8 in (96 mm)
- Clear or mostly clear days12
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)