Janesville, WI has a continental climate with average temperatures ranging from -1°C (30°F) in the winter to 22°C (71°F) in the summer. During the summer months, there is plenty of sunshine and moderate humid days. Winters tend to be cold and snowy with occasional blizzards and icy conditions. Janesville also experiences thunderstorms mainly during spring and summer seasons. The city sees an average of 40 inches of rain per year, with most precipitation occurring during the late spring and early summer months.
Janesville, Wisconsin gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Janesville averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 185 sunny days per year in Janesville. The US average is 205 sunny days.
Janesville gets some kind of precipitation, on average, 116 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 83 degrees
Winter Low: the January low is 11
Rain: averages 36 inches of rain a year
Snow: averages 34 inches of snow a year