Hilton Head Island, SC 29928 Frost Dates
Hilton Head Island, SC: when does the frost end?
The last spring frost here typically falls around 03/03, about 187 days from today. Fall's first freeze usually shows up around 12/09, roughly 282 days after the last spring frost.
Zone 9b (25 to 30°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 Hilton Head Island, not a forecast for this year.
Stretching the season past the first frost
With roughly 15 weeks until Hilton Head Island's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Hilton Head Island's last frost
03/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/20 and only about 1 year in 10 sees frost after that.
Hilton Head Island against the rest of the dataset
At roughly 282 frost-free days, Hilton Head Island places 4,768 of 40,283 ZIP codes in this dataset. Within SC, it ranks 15 of 519.
Learn more
Before leaning on 29928's figures: zone vs. frost date explains why Zone 9b and Hilton Head Island's frost date answer different questions, while the frost range explains how to read the range around Hilton Head Island's dates instead of trusting one.