In February, the weather in Charlston is typically cold. Average daily high temperature in February is about 8 degrees above zero. On average, Charlston has 8 rainy, 8 cloudy, 7 sunny, 5 partly cloudy, and 1 snowy day in February. The rains are usually heavy. February as well as January, March, July, and December is considered the most uncomfortable time to visit Charlston.