Johnson County, Iowa gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Johnson County averages 27 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 195 sunny days per year in Johnson County. The US average is 205 sunny days.
Johnson County gets some kind of precipitation, on average, 99 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.
Summer High: the July high is around 85 degrees
Winter Low: the January low is 13
Rain: averages 37 inches of rain a year
Snow: averages 27 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Johnson County is 7.0 (10=best), which means it is more comfortable than most places in Iowa.
7 / 10
June, September and May are the most pleasant months in Johnson County, while January and December are the least comfortable months.