McColl, SC 29570 Frost Dates
29570, near McColl, SC: the frost window
Around 03/26 is the usual last spring frost, about 210 days away. Fall's first freeze usually shows up around 11/08, roughly 228 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts McColl in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
McColl'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
03/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
McColl against the rest of the dataset
About 228 days separate McColl's last and first frost, putting it 10,854 of 40,283 ZIP codes nationally. Within SC, it ranks 348 of 519.
Learn more
Two guides worth reading on 29570: zone vs. frost date, on why Zone 8a and McColl's frost date answer different questions, and the frost range, on how to read the range around McColl's dates instead of trusting one.