Mount Pleasant, SC 29417 Frost Dates
Mount Pleasant, SC: when does the frost end?
Typically, the last spring freeze lands around 03/13, roughly 197 days out. 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
With roughly 13 weeks until Mount Pleasant's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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
About 262 days separate Mount Pleasant's last and first frost, putting it 6,183 of 40,283 ZIP codes nationally. Within SC, it ranks 57 of 519.
Learn more
Before leaning on 29417's figures: the frost range explains how to read the range around Mount Pleasant's dates instead of trusting one, while local microclimates explains what one yard in Mount Pleasant can differ from the 29417 normal.