Charleston, MS 38921 Frost Dates
Frost dates for Charleston, MS, ZIP 38921
Typically, the last spring freeze lands around 03/07, roughly 191 days out. The first fall frost typically arrives around 11/17, about 254 frost-free days later.
Charleston sits in USDA Zone 8a (10 to 15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 8a around Charleston has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Charleston's last frost
03/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/15 and you're betting against frost in roughly 9 years out of 10. 03/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Charleston compares
About 254 days separate Charleston's last and first frost, putting it 7,038 of 40,283 ZIP codes nationally. Within MS, it ranks 102 of 523.
Learn more
local microclimates explains what one yard in Charleston can differ from the 38921 normal, and zone vs. frost date explains why Zone 8a and Charleston's frost date answer different questions.