Decatur, GA 30030 Frost Dates
Frost dates for Decatur, GA, ZIP 30030
Typically, the last spring freeze lands around 03/25, roughly 209 days out. The first fall frost typically arrives around 11/09, about 228 frost-free days later.
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 Decatur, not a forecast for this year.
What to do before the first frost
Zone 8a around Decatur 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 03/25 isn't a guarantee
03/25 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 04/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Decatur compares
About 228 days separate Decatur's last and first frost, putting it 10,737 of 40,283 ZIP codes nationally. Within GA, it ranks 595 of 921.
Learn more
local microclimates explains what one yard in Decatur can differ from the 30030 normal, and zone vs. frost date explains why Zone 8a and Decatur's frost date answer different questions.