Charleston, SC, has a humid subtropical climate with hot and humid summers and mild winters. The average temperature in the summer is around 77 °F (25 °C), while in the winter it ranges between 43–57 °F (6–14 °C). The city experiences frequent thunderstorms and occasional hurricanes during hurricane season from June to November. It gets an average of 48 inches of rain annually, most of which falls from April-September. Charleston also receives an average of 205 days of sunshine throughout the year.
Charleston, South Carolina gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Charleston averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 209 sunny days per year in Charleston. The US average is 205 sunny days.
Charleston gets some kind of precipitation, on average, 106 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.
Summer High: the July high is around 90 degrees
Winter Low: the January low is 39
Rain: averages 48 inches of rain a year
Snow: averages 0 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Charleston is 7.2 (10=best), which means it is less comfortable than most places in South Carolina.
4.1 / 7.8
Summer / Winter
October, April and May are the most pleasant months in Charleston, while July and August are the least comfortable months.