The climate in 61865 Potomac, IL is generally mild with warm summers and cold winters. During the summer months, temperatures can reach up into the 80s (Fahrenheit) during the day while dropping to the mid-50s at night. Winters typically bring temperatures that range from the mid-30s during the day to just above freezing at night. The area also experiences significant precipitation throughout the year, so it鈥檚 important to be prepared for rain or snow depending on time of year.
Potomac (zip 61865), Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Potomac (zip 61865) averages 15 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 Potomac (zip 61865). The US average is 205 sunny days.
Potomac (zip 61865) gets some kind of precipitation, on average, 109 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 86 degrees
Winter Low: the January low is 18
Rain: averages 39 inches of rain a year
Snow: averages 15 inches of snow a year