Sully, IA has a humid continental climate with warm summers and cold winters. The average high temperature in the summertime is above 80 degrees Fahrenheit, with an average low temperature of around 60 degrees. In the winter, temperatures can drop as low as 0 degrees Fahrenheit, and average highs typically do not exceed 40 degrees. Precipitation is consistent throughout the year, with snowfall occurring in the winter months. The humidity levels tend to stay between 50-70%, and thunderstorms are common during the summer months.
Sully, Iowa gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sully averages 28 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 Sully. The US average is 205 sunny days.
Sully gets some kind of precipitation, on average, 107 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 11
Rain: averages 37 inches of rain a year
Snow: averages 28 inches of snow a year