Simpsonville, SC 29680 Frost Dates
Frost dates for Simpsonville, SC, ZIP 29680
Around 03/16 is the usual last spring frost, about 200 days away. The first fall frost typically arrives around 11/20, about 250 frost-free days later.
Simpsonville 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 Simpsonville 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.
How much risk comes with planting early here
03/16 is the middle of 30 years of NOAA records, not a promise. Plant by 02/26 and you're betting against frost in roughly 9 years out of 10. 04/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Simpsonville compares
At roughly 250 frost-free days, Simpsonville places 7,466 of 40,283 ZIP codes in this dataset. Within SC, it ranks 124 of 519.
Learn more
the frost range explains how to read the range around Simpsonville's dates instead of trusting one, and local microclimates explains what one yard in Simpsonville can differ from the 29680 normal.