Smyrna, GA 30377 Frost Dates
Frost dates for Smyrna, GA, ZIP 30377
Typically, the last spring freeze lands around 03/24, roughly 208 days out. The first fall frost typically arrives around 11/08, about 231 frost-free days later.
The USDA Plant Hardiness Zone Map puts Smyrna in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8a around Smyrna has about 10 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/02 and you're betting against frost in roughly 9 years out of 10. 04/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Smyrna compares
About 231 days separate Smyrna's last and first frost, putting it 10,110 of 40,283 ZIP codes nationally. Within GA, it ranks 517 of 921.
Learn more
the frost range explains how to read the range around Smyrna's dates instead of trusting one, and local microclimates explains what one yard in Smyrna can differ from the 30377 normal.