Irondale, AL 35210 Frost Dates
Frost dates for Irondale, AL, ZIP 35210
Typically, the last spring freeze lands around 03/21, roughly 205 days out. The first fall frost typically arrives around 11/11, about 236 frost-free days later.
Zone 8a (10 to 15°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 Irondale, not a forecast for this year.
What to do before the first frost
Zone 8a around Irondale 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.
Why 03/21 isn't a guarantee
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 Irondale compares
At roughly 236 frost-free days, Irondale places 9,344 of 40,283 ZIP codes in this dataset. Within AL, it ranks 375 of 809.
Learn more
zone vs. frost date explains why Zone 8a and Irondale's frost date answer different questions, and the frost range explains how to read the range around Irondale's dates instead of trusting one.