Detroit, AL 35552 Frost Dates
Frost dates for Detroit, AL, ZIP 35552
Typically, the last spring freeze lands around 04/11, roughly 226 days out. The first fall frost typically arrives around 10/27, about 198 frost-free days later.
Zone 7b (5 to 10°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 Detroit, not a forecast for this year.
What to do before the first frost
Zone 7b around Detroit has about 9 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
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/26 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Detroit compares
At roughly 198 frost-free days, Detroit places 18,539 of 40,283 ZIP codes in this dataset. Within AL, it ranks 809 of 809.
Learn more
the frost range explains how to read the range around Detroit's dates instead of trusting one, and local microclimates explains what one yard in Detroit can differ from the 35552 normal.