Hillsboro, AL 35643 Frost Dates
Frost dates for Hillsboro, AL, ZIP 35643
Typically, the last spring freeze lands around 03/28, roughly 212 days out. The first fall frost typically arrives around 11/03, about 221 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hillsboro in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8a around Hillsboro 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.
How much risk comes with planting early here
03/28 is the middle of 30 years of NOAA records, not a promise. Plant by 03/08 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 Hillsboro compares
At roughly 221 frost-free days, Hillsboro places 12,581 of 40,283 ZIP codes in this dataset. Within AL, it ranks 621 of 809.
Learn more
local microclimates explains what one yard in Hillsboro can differ from the 35643 normal, and zone vs. frost date explains why Zone 8a and Hillsboro's frost date answer different questions.