Jefferson, IA has a humid continental climate with warm summers and cold winters. In the summer the temperatures average in the mid 70s with high humidity levels while in the winter they typically range from the low 20s to mid-30s. This temperate climate provides lots of opportunities for outdoor recreation year-round, including hiking, biking, and camping in the warmer months and snow sports like skiing and snowshoeing during colder weather. Precipitation is fairly evenly distributed throughout the year, with occasional spring floods being one of its only extreme weather events.
Jefferson, Iowa gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Jefferson averages 27 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 204 sunny days per year in Jefferson. The US average is 205 sunny days.
Jefferson gets some kind of precipitation, on average, 97 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 85 degrees
Winter Low: the January low is 10
Rain: averages 35 inches of rain a year
Snow: averages 27 inches of snow a year