Spanish Fort, AL 36578 Frost Dates
Frost dates for Spanish Fort, AL, ZIP 36578
Around 02/28 is the usual last spring frost, about 184 days away. The first fall frost typically arrives around 11/25, about 272 frost-free days later.
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 Spanish Fort, not a forecast for this year.
What to do before the first frost
Zone 9a around Spanish Fort has about 13 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 02/28 isn't a guarantee
02/28 is the middle of 30 years of NOAA records, not a promise. Plant by 02/03 and you're betting against frost in roughly 9 years out of 10. 03/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Spanish Fort compares
At roughly 272 frost-free days, Spanish Fort places 5,360 of 40,283 ZIP codes in this dataset. Within AL, it ranks 27 of 809.
Learn more
the frost range explains how to read the range around Spanish Fort's dates instead of trusting one, and local microclimates explains what one yard in Spanish Fort can differ from the 36578 normal.