Grundy County, IA has a humid continental climate with warm summers and cold winters. Average summer temperatures range from 65°F to 88°F while winter temperatures typically stay between 16°F and 39°F. During the winter months, snowfall is common, averaging around 22 inches per year. Summers tend to be hot and humid, with occasional thunderstorms providing much needed rain. Overall Grundy County experiences a moderate climate throughout the year that allows for comfortable weather conditions in both summer and winter months.
Grundy County, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Grundy County averages 33 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 Grundy County. The US average is 205 sunny days.
Grundy County gets some kind of precipitation, on average, 98 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 9
Rain: averages 36 inches of rain a year
Snow: averages 33 inches of snow a year