Semmes, AL 36575 Frost Dates
36575, near Semmes, AL: the frost window
Around 03/03 is the usual last spring frost, about 187 days away. Fall's first freeze usually shows up around 11/25, roughly 268 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Semmes in Zone 9a (20 to 25°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
Semmes's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/03 isn't a guarantee
03/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/21 and only about 1 year in 10 sees frost after that.
Semmes against the rest of the dataset
At roughly 268 frost-free days, Semmes places 5,750 of 40,283 ZIP codes in this dataset. Within AL, it ranks 79 of 809.
Learn more
Two guides worth reading on 36575: local microclimates, on what one yard in Semmes can differ from the 36575 normal, and zone vs. frost date, on why Zone 9a and Semmes's frost date answer different questions.