Jamestown, SC 29453 Frost Dates
29453, near Jamestown, SC: the frost window
Around 03/17 is the usual last spring frost, about 201 days away. Fall's first freeze usually shows up around 11/21, roughly 250 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Jamestown in Zone 8b (15 to 20°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
Jamestown's growing season runs out in roughly 12 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
03/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/04 and only about 1 year in 10 sees frost after that.
Jamestown against the rest of the dataset
At roughly 250 frost-free days, Jamestown places 7,603 of 40,283 ZIP codes in this dataset. Within SC, it ranks 134 of 519.
Learn more
Two guides worth reading on 29453: local microclimates, on what one yard in Jamestown can differ from the 29453 normal, and zone vs. frost date, on why Zone 8b and Jamestown's frost date answer different questions.