Janesville, Iowa (50647) has a humid continental climate, with hot summers and cold winters. The average annual temperature in the area is around 50°F (10°C), while the average high temperatures during summer months reach into the mid-80s (30°C). Winters can be bitterly cold, with freezing temperatures and snowfall occurring frequently throughout the season. The area also receives abundant precipitation year-round, with an annual average of 30 inches (760 mm).
Janesville (zip 50647), Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Janesville (zip 50647) averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 191 sunny days per year in Janesville (zip 50647). The US average is 205 sunny days.
Janesville (zip 50647) gets some kind of precipitation, on average, 104 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 84 degrees
Winter Low: the January low is 8
Rain: averages 36 inches of rain a year
Snow: averages 34 inches of snow a year