Charleston Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Charleston, South Carolina during each month of the year.
The average high and low temperatures are listed below monthly and annually for Charleston, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 70, 80 or 90 °F each month in the city, scroll down farther. There are also monthly and yearly counts of days with cold weather.
All the numbers are long-term historical averages based on climate data gathered from 1981 to 2010.
|High °F||Low °F||High °C||Low °C|
Days of Hot Weather in Charleston
Days with temperatures peaking in the 90s F are common at Charleston from May to September. But the thermometer rarely reaches 100 degrees (38 °C). While days that hot are possible during June, July and August, that kind of heat does not happen every year.
How Often Charleston Has Cold Temperatures
From November to March in Charleston, some nights can turn frosty. The coldest nights in December, January or February get down to 20 °F (-8 °C) or below. Only one or two nights a year on average have temperatures that chilly.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.