Walhalla, SC 29691 Frost Dates
29691, near Walhalla, SC: the frost window
Around 04/09 is the usual last spring frost, about 224 days away. Fall's first freeze usually shows up around 10/29, roughly 205 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Walhalla in Zone 8a (10 to 15°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
Walhalla's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/09 isn't a guarantee
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Walhalla against the rest of the dataset
About 205 days separate Walhalla's last and first frost, putting it 16,283 of 40,283 ZIP codes nationally. Within SC, it ranks 494 of 519.
Learn more
Two guides worth reading on 29691: local microclimates, on what one yard in Walhalla can differ from the 29691 normal, and zone vs. frost date, on why Zone 8a and Walhalla's frost date answer different questions.