Anniston, MO 63820 Frost Dates
63820, near Anniston, MO: the frost window
Typically, the last spring freeze lands around 03/26, roughly 210 days out. Fall's first freeze usually shows up around 11/06, roughly 225 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Anniston in Zone 7b (5 to 10°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
Anniston'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.
Why 03/26 isn't a guarantee
03/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/09 and only about 1 year in 10 sees frost after that.
Anniston against the rest of the dataset
At roughly 225 frost-free days, Anniston places 11,502 of 40,283 ZIP codes in this dataset. Within MO, it ranks 22 of 1,129.
Learn more
Two guides worth reading on 63820: zone vs. frost date, on why Zone 7b and Anniston's frost date answer different questions, and the frost range, on how to read the range around Anniston's dates instead of trusting one.