Mount Croghan, SC 29727 Frost Dates
29727, near Mount Croghan, SC: the frost window
Typically, the last spring freeze lands around 03/27, roughly 211 days out. Fall's first freeze usually shows up around 11/08, roughly 228 days after the last spring frost.
Mount Croghan 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.
Stretching the season past the first frost
Mount Croghan's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
03/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/09 and only about 1 year in 10 sees frost after that.
Mount Croghan against the rest of the dataset
At roughly 228 frost-free days, Mount Croghan places 10,929 of 40,283 ZIP codes in this dataset. Within SC, it ranks 355 of 519.
Learn more
Two guides worth reading on 29727: the frost range, on how to read the range around Mount Croghan's dates instead of trusting one, and local microclimates, on what one yard in Mount Croghan can differ from the 29727 normal.