Aynor, SC 29546 Frost Dates
29546, near Aynor, SC: the frost window
The last spring frost here typically falls around 03/22, about 206 days from today. Fall's first freeze usually shows up around 11/11, roughly 234 days after the last spring frost.
Aynor sits in USDA Zone 8b (15 to 20°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.
Stretching the season past the first frost
Aynor's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/22 isn't a guarantee
03/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/13 and only about 1 year in 10 sees frost after that.
Aynor against the rest of the dataset
About 234 days separate Aynor's last and first frost, putting it 9,776 of 40,283 ZIP codes nationally. Within SC, it ranks 280 of 519.
Learn more
Two guides worth reading on 29546: zone vs. frost date, on why Zone 8b and Aynor's frost date answer different questions, and the frost range, on how to read the range around Aynor's dates instead of trusting one.