Smyrna, GA 30368 Frost Dates
Frost dates for Smyrna, GA, ZIP 30368
Around 03/24 is the usual last spring frost, about 208 days away. The first fall frost typically arrives around 11/08, about 231 frost-free days later.
Smyrna 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.
What to do before the first frost
Zone 8b 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
Smyrna's growing season runs about 231 days, ranking 10,104 of 40,283 US ZIP codes measured here, longest to shortest. Within GA, it ranks 511 of 921.
Learn more
zone vs. frost date explains why Zone 8b and Smyrna's frost date answer different questions, and the frost range explains how to read the range around Smyrna's dates instead of trusting one.