Marietta, OK 73453 Frost Dates
73453, near Marietta, OK: the frost window
Typically, the last spring freeze lands around 04/06, roughly 221 days out. Fall's first freeze usually shows up around 11/02, roughly 211 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 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/24 and only about 1 year in 10 sees frost after that.
Marietta against the rest of the dataset
At roughly 211 frost-free days, Marietta places 14,772 of 40,283 ZIP codes in this dataset. Within OK, it ranks 445 of 764.
Learn more
Two guides worth reading on 73453: local microclimates, on what one yard in Marietta can differ from the 73453 normal, and zone vs. frost date, on why Zone 8a and Marietta's frost date answer different questions.