Frost Dates in South Carolina

At the middle station of the 99 in South Carolina where a freeze comes every year, the last spring frost (50%) is March 26 and the first fall frost November 9, a freeze-free season of 231 days. The last frost is earliest at Charleston (Charleston City, SC, February 4) and latest at Salem (Jocassee 8 WNW, SC, April 26), 81 days apart. The season runs from 174 days at Salem to 321 at Charleston.

70 of these stations were also in NOAA's previous normals, for 1981–2010. Between the two, the median station's freeze-free season grew 6 days longer, with the last spring frost 3 days earlier and the first fall frost 1 day later; the season lengthened at 59 stations and shortened at 10. The two periods share twenty years, so the change reflects mostly 2011–2020 against 1981–1990.