Sumter, SC County has a humid subtropical climate with hot and humid summers and mild winters. The average high in the summertime is around 90掳F while the average low in the winter is around 40掳F. Precipitation varies throughout the year, with particularly heavy rainfall during the spring and summer months. Overall, Sumter, SC County has a pleasant climate that encourages outdoor activities year-round.
Sumter County, South Carolina gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sumter County averages 1 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 218 sunny days per year in Sumter County. The US average is 205 sunny days.
Sumter County gets some kind of precipitation, on average, 105 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 91 degrees
Winter Low: the January low is 33
Rain: averages 47 inches of rain a year
Snow: averages 1 inches of snow a year