Isle of Palms, SC 29451 Frost Dates
Frost dates for Isle of Palms, SC, ZIP 29451
The last spring frost here typically falls around 03/13, about 197 days from today. The first fall frost typically arrives around 11/30, about 262 frost-free days later.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Isle of Palms, not a forecast for this year.
What to do before the first frost
Zone 9a around Isle of Palms has about 13 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.
Why 03/13 isn't a guarantee
03/13 is the middle of 30 years of NOAA records, not a promise. Plant by 02/19 and you're betting against frost in roughly 9 years out of 10. 03/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Isle of Palms compares
Isle of Palms's growing season runs about 262 days, ranking 6,233 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 63 of 519.
Learn more
the frost range explains how to read the range around Isle of Palms's dates instead of trusting one, and local microclimates explains what one yard in Isle of Palms can differ from the 29451 normal.