Hanahan, SC 29406 Frost Dates
When can you plant in Hanahan, SC?
Typically, the last spring freeze lands around 03/07, roughly 191 days out. The first fall frost typically arrives around 11/27, about 266 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hanahan in Zone 9a (20 to 25°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
About 13 weeks of growing season left in Hanahan before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Hanahan's last frost
03/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/12 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 Hanahan compares
About 266 days separate Hanahan's last and first frost, putting it 5,925 of 40,283 ZIP codes nationally. Within SC, it ranks 47 of 519.
Learn more
zone vs. frost date covers why Zone 9a and Hanahan's frost date answer different questions. the frost range covers how to read the range around Hanahan's dates instead of trusting one.