Charleston, SC Weather
Today's Forecast
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Southwest wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
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Data from the National Weather Service
Last updated Sun, Aug 23, 12:32 AM UTC
Active alerts for Charleston
- Flood Warning
Berkeley, SC; Charleston, SC; Dorchester, SC
Relayed from the National Weather Service. See every active warning. For anything affecting your safety, use weather.gov.
Winter in Charleston
Charleston sees essentially no snow in an average year, according to NOAA’s 1991–2020 climate normals — a essentially snowless place. Measurable snow is close to unheard of. On the rare occasion it falls, everything stops.
That is why local snowfall thresholds differ so much from one town to the next: a district that plans for 0 inches a year is equipped differently from one that never sees any. Here, roughly 0.5 inches in a single storm is where a normal school day comes under threat.
Upper air over Charleston
The nearest radiosonde launch is Charleston, about 10 miles away. A weather balloon goes up twice a day and measures temperature, humidity and wind all the way through the atmosphere — which is what forecasters actually read to judge whether storms will fire, and how a surface forecast was arrived at.