Swansea, SC 29160 Frost Dates
Frost dates for Swansea, SC, ZIP 29160
Typically, the last spring freeze lands around 03/25, roughly 209 days out. The first fall frost typically arrives around 11/07, about 229 frost-free days later.
The USDA Plant Hardiness Zone Map puts Swansea in Zone 8b (15 to 20°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 8b around Swansea has about 10 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
03/25 is the middle of 30 years of NOAA records, not a promise. Plant by 03/04 and you're betting against frost in roughly 9 years out of 10. 04/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Swansea compares
About 229 days separate Swansea's last and first frost, putting it 10,636 of 40,283 ZIP codes nationally. Within SC, it ranks 342 of 519.
Learn more
zone vs. frost date explains why Zone 8b and Swansea's frost date answer different questions, and the frost range explains how to read the range around Swansea's dates instead of trusting one.