Climate almanac
Janesville
Wisconsin, United States · 42.68°, -89.02°
What is the weather like in Janesville in May?
In May, Janesville is typically 71°F (22°C) during the day and 51°F (11°C) at night. The month brings about 4.4 in (111 mm) of precipitation in total.
- Average high71°F (22°C)
- Average low51°F (11°C)
- Precipitation4.4 in (111 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)