Smyrna, GA 30343 Frost Dates
30343, 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.
Smyrna sits in USDA Zone 8a (10 to 15°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
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.
How much risk comes with planting early here
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 10,096 of 40,283 US ZIP codes measured here, longest to shortest. Within GA, it ranks 503 of 921.
Learn more
Two guides worth reading on 30343: the frost range, on how to read the range around Smyrna's dates instead of trusting one, and local microclimates, on what one yard in Smyrna can differ from the 30343 normal.