Charleston County weather, town by town
17 places in Charleston County, South Carolina, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Charleston County Weather Facts
Charleston County has 17 places on myweatherrock (12 towns, 4 cities, 1 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 107°F at Summerville 4W on September 21, 1925. The coldest night is -5°F at Summerville 4W on February 14, 1899. The wettest day brought 11.64 inches of rain at Edisto Beach Sp on November 2, 1969. The biggest single-day snow measured 5.98 inches at Charleston Intl Ap on December 23, 1989. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Charleston, about 115 square miles.
About Charleston County weather
The map on the Now tab shows every Charleston County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 15 Charleston County towns with station normals, the warmest month is July, when the day usually reaches 90°F, and the coldest is January, when the night usually falls to 40°F. July is the wettest, with rain on about 12 days. July afternoons run from about 88°F in Folly Beach to 91°F in Adams Run. January nights run from about 35°F in Lincolnville to 44°F in Folly Beach.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Charleston County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about Charleston County weather
- What is the hottest temperature recorded at a Charleston County station?
- 107°F at Summerville 4W on September 21, 1925, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Charleston County station?
- -5°F at Summerville 4W on February 14, 1899.
- What is the most rain a Charleston County station has measured in one day?
- 11.64 inches at Edisto Beach Sp on November 2, 1969.
- What is the biggest one-day snowfall at a Charleston County station?
- 5.98 inches at Charleston Intl Ap on December 23, 1989.
- How many Charleston County towns have a weather page here?
- 17: 12 towns, 4 cities, 1 census-designated places. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Charleston County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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