Mobile, AL 36606 Frost Dates
Frost dates for Mobile, AL, ZIP 36606
Around 02/21 is the usual last spring frost, about 177 days away. The first fall frost typically arrives around 12/06, about 292 frost-free days later.
Mobile sits in USDA Zone 9a (20 to 25°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.
What to do before the first frost
Zone 9a around Mobile has about 14 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 02/21 isn't a guarantee
02/21 is the middle of 30 years of NOAA records, not a promise. Plant by 01/25 and you're betting against frost in roughly 9 years out of 10. 03/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mobile compares
At roughly 292 frost-free days, Mobile places 4,310 of 40,283 ZIP codes in this dataset. Within AL, it ranks 9 of 809.
Learn more
local microclimates explains what one yard in Mobile can differ from the 36606 normal, and zone vs. frost date explains why Zone 9a and Mobile's frost date answer different questions.