Macon-Bibb County, GA 31220 Frost Dates
31220, near Macon-Bibb County, GA: the frost window
Typically, the last spring freeze lands around 03/21, roughly 205 days out. Fall's first freeze usually shows up around 11/10, roughly 235 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Macon-Bibb County in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Macon-Bibb County's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/21 isn't a guarantee
03/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/07 and only about 1 year in 10 sees frost after that.
Macon-Bibb County against the rest of the dataset
At roughly 235 frost-free days, Macon-Bibb County places 9,548 of 40,283 ZIP codes in this dataset. Within GA, it ranks 410 of 921.
Learn more
Two guides worth reading on 31220: zone vs. frost date, on why Zone 8b and Macon-Bibb County's frost date answer different questions, and the frost range, on how to read the range around Macon-Bibb County's dates instead of trusting one.