Smyrna, GA 30361 Frost Dates
30361, near Smyrna, GA: the frost window
Typically, the last spring freeze lands around 03/24, roughly 208 days out. Fall's first freeze usually shows up around 11/08, roughly 231 days after the last spring frost.
Zone 8a (10 to 15°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 Smyrna, not a forecast for this year.
Stretching the season past the first frost
Smyrna's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Smyrna against the rest of the dataset
Smyrna's growing season runs about 231 days, ranking 10,101 of 40,283 US ZIP codes measured here, longest to shortest. Within GA, it ranks 508 of 921.
Learn more
Two guides worth reading on 30361: local microclimates, on what one yard in Smyrna can differ from the 30361 normal, and zone vs. frost date, on why Zone 8a and Smyrna's frost date answer different questions.