Monmouth, IL has a humid continental climate with hot summers and cold winters. The average annual high temperature is around 55°F (13°C), while the average annual low temperature is around 35°F (2°C). The precipitation level is generally above 40 inches per year, providing plenty of moisture throughout the year. Snowfall totals range from 20-30 inches per year, making winter months in Monmouth, IL colder than other areas of the country. Frost usually occurs in late October or early November and the growing season typically lasts for about 120 days.
Monmouth (zip 61462), Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Monmouth (zip 61462) averages 24 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in Monmouth (zip 61462). The US average is 205 sunny days.
Monmouth (zip 61462) gets some kind of precipitation, on average, 108 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 14
Rain: averages 39 inches of rain a year
Snow: averages 24 inches of snow a year