The temperatures in Janesville in May are usually low and can range between 10°C and 20°C.
You can expect rain for roughly half of the month of May in Janesville. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Janesville in May 2025.
If you’re planning to visit Janesville in the near future, we highly recommend that you review the 14 day weather forecast for Janesville before you arrive.
Temperatures
20° / 10°
Rainy Days
9
Snowy Days
0
Dry Days
22
Rainfall
115
mm
Sun Hours
5.4
Hrs
