Semmes, AL 36663 Frost Dates
Semmes, AL: when does the frost end?
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.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Semmes, not a forecast for this year.
Stretching the season past the first frost
With roughly 13 weeks until Semmes's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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
Semmes's growing season runs about 268 days, ranking 5,752 of 40,283 US ZIP codes measured here, longest to shortest. Within AL, it ranks 81 of 809.
Learn more
Before leaning on 36663's figures: local microclimates explains what one yard in Semmes can differ from the 36663 normal, while zone vs. frost date explains why Zone 9a and Semmes's frost date answer different questions.