Anderson, SC 29621 Frost Dates
Frost dates for Anderson, SC, ZIP 29621
Typically, the last spring freeze lands around 03/23, roughly 207 days out. The first fall frost typically arrives around 11/11, about 234 frost-free days later.
The USDA Plant Hardiness Zone Map puts Anderson in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8a around Anderson has about 11 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.
How much risk comes with planting early here
03/23 is the middle of 30 years of NOAA records, not a promise. Plant by 03/03 and you're betting against frost in roughly 9 years out of 10. 04/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Anderson compares
About 234 days separate Anderson's last and first frost, putting it 9,709 of 40,283 ZIP codes nationally. Within SC, it ranks 265 of 519.
Learn more
local microclimates explains what one yard in Anderson can differ from the 29621 normal, and zone vs. frost date explains why Zone 8a and Anderson's frost date answer different questions.