Union Springs, AL 36031 Frost Dates
Frost dates for Union Springs, AL, ZIP 36031
Typically, the last spring freeze lands around 03/25, roughly 209 days out. The first fall frost typically arrives around 11/08, about 228 frost-free days later.
Union Springs sits in USDA Zone 8b (15 to 20°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 8b around Union Springs has about 10 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 03/25 isn't a guarantee
03/25 is the middle of 30 years of NOAA records, not a promise. Plant by 03/03 and you're betting against frost in roughly 9 years out of 10. 04/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Union Springs compares
At roughly 228 frost-free days, Union Springs places 10,843 of 40,283 ZIP codes in this dataset. Within AL, it ranks 561 of 809.
Learn more
the frost range explains how to read the range around Union Springs's dates instead of trusting one, and local microclimates explains what one yard in Union Springs can differ from the 36031 normal.