Marietta, GA 30111 Frost Dates
30111, near Marietta, GA: the frost window
Typically, the last spring freeze lands around 03/27, roughly 211 days out. Fall's first freeze usually shows up around 11/07, roughly 225 days after the last spring frost.
Marietta 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
Marietta'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.
The actual range around Marietta's last frost
03/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Marietta against the rest of the dataset
Marietta's growing season runs about 225 days, ranking 11,356 of 40,283 US ZIP codes measured here, longest to shortest. Within GA, it ranks 683 of 921.
Learn more
Two guides worth reading on 30111: local microclimates, on what one yard in Marietta can differ from the 30111 normal, and zone vs. frost date, on why Zone 8a and Marietta's frost date answer different questions.