Clayton, IA County has a humid continental climate, defined by warm to hot summers and cold winters. Winters tend to be long and snowy, with temperatures typically reaching below freezing in December and through much of January. Summers are usually hot and humid, with temperatures ranging from the low 80s in June to the high 80s in July and August. Rainfall is evenly spread over the year, but most days have more sunshine than rainfall on average. The area also receives some snowfall throughout the winter months and occasionally into spring.
Clayton County, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Clayton County averages 36 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 Clayton County. The US average is 205 sunny days.
Clayton County 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 83 degrees
Winter Low: the January low is 8
Rain: averages 36 inches of rain a year
Snow: averages 36 inches of snow a year