Monticello, IA has a humid continental climate, which is characterized by hot and humid summers and cold, dry winters. Summers in Monticello typically feature high temperatures near 80 degrees Fahrenheit and plenty of precipitation from thunderstorms. Winters tend to be colder, with average lows around 20 degrees and several inches of snowfall each season. The area also experiences four distinct seasons, with spring and fall temperatures ranging between 45-70 degrees Fahrenheit. Overall, the climate in Monticello is temperate and provides a great variety of seasonal weather throughout the year.
Monticello, Iowa gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Monticello averages 28 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 188 sunny days per year in Monticello. The US average is 205 sunny days.
Monticello 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 84 degrees
Winter Low: the January low is 9
Rain: averages 37 inches of rain a year
Snow: averages 28 inches of snow a year