Frost Dates in Mississippi

At the middle station of the 94 in Mississippi where a freeze comes every year, the last spring frost (50%) is March 17 and the first fall frost November 11, a freeze-free season of 239 days. The last frost is earliest at Ocean Springs (Biloxi, MS, February 12) and latest at Iuka (Iuka, MS, April 9), 56 days apart. The season runs from 202 days at New Albany to 301 at Ocean Springs.

77 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 4 days earlier and the first fall frost 1 day later; the season lengthened at 63 stations and shortened at 13. The two periods share twenty years, so the change reflects mostly 2011–2020 against 1981–1990.