The climate in Sullivan, MO County is characterized by hot, humid summers and cold, often bitterly cold winters. Summers are usually quite sunny and humid, with temperatures typically reaching into the 80s and 90s during the day and cooling off to the 60s or 70s during the night. Winters are cold and snowy, with temperatures ranging from the upper 20s to the lower 40s on average. Precipitation is generally moderate throughout the year ranging between 30-40 inches on average.
Sullivan County, Missouri gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sullivan County averages 17 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 Sullivan County. The US average is 205 sunny days.
Sullivan County gets some kind of precipitation, on average, 102 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 15
Rain: averages 40 inches of rain a year
Snow: averages 17 inches of snow a year