Birmingham, AL 35207 Frost Dates
Frost dates for Birmingham, AL, ZIP 35207
Around 03/21 is the usual last spring frost, about 205 days away. The first fall frost typically arrives around 11/11, about 236 frost-free days later.
Birmingham sits in USDA Zone 8a (10 to 15°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 8a around Birmingham has about 11 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.
How much risk comes with planting early here
03/21 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Birmingham compares
Birmingham's growing season runs about 236 days, ranking 9,219 of 40,283 US ZIP codes measured here, longest to shortest. Within AL, it ranks 352 of 809.
Learn more
local microclimates explains what one yard in Birmingham can differ from the 35207 normal, and zone vs. frost date explains why Zone 8a and Birmingham's frost date answer different questions.