Mount Pleasant, SC 29464 Frost Dates
29464, near Mount Pleasant, SC: the frost window
The last spring frost here typically falls around 03/13, about 197 days from today. Fall's first freeze usually shows up around 11/30, roughly 262 days after the last spring frost.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Mount Pleasant, not a forecast for this year.
Stretching the season past the first frost
Mount Pleasant's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/13 isn't a guarantee
03/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/30 and only about 1 year in 10 sees frost after that.
Mount Pleasant against the rest of the dataset
Mount Pleasant's growing season runs about 262 days, ranking 6,187 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 61 of 519.
Learn more
Two guides worth reading on 29464: zone vs. frost date, on why Zone 9a and Mount Pleasant's frost date answer different questions, and the frost range, on how to read the range around Mount Pleasant's dates instead of trusting one.