Williamson County, TN has a humid subtropical climate with hot and humid summers and cool winters. The county experiences four distinct seasons, each of which brings its own unique weather conditions. Summer temperatures are often in the upper 80s and low 90s, while winter temperatures can dip as low as the high 20s. Rainfall is abundant throughout the year, averaging around 50 inches annually. Spring and fall bring milder weather, when temperatures generally stay between 65-75 degrees. There is also plenty of sunshine throughout the year to enjoy outdoor activities.
Williamson County, Tennessee gets 54 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Williamson County averages 3 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 208 sunny days per year in Williamson County. The US average is 205 sunny days.
Williamson County gets some kind of precipitation, on average, 120 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 89 degrees
Winter Low: the January low is 26
Rain: averages 54 inches of rain a year
Snow: averages 3 inches of snow a year