Barnwell, SC 29812 Frost Dates
Barnwell, SC: when does the frost end?
The last spring frost here typically falls around 03/20, about 204 days from today. Fall's first freeze usually shows up around 11/13, roughly 238 days after the last spring frost.
Barnwell sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 11 weeks until Barnwell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Barnwell's last frost
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Barnwell against the rest of the dataset
Barnwell's growing season runs about 238 days, ranking 8,967 of 40,283 US ZIP codes measured here, longest to shortest. Within SC, it ranks 215 of 519.
Learn more
Before leaning on 29812's figures: zone vs. frost date explains why Zone 8b and Barnwell's frost date answer different questions, while the frost range explains how to read the range around Barnwell's dates instead of trusting one.