Keystone Heights, FL 32631 Frost Dates
Frost dates for Keystone Heights, FL, ZIP 32631
Typically, the last spring freeze lands around 03/03, roughly 187 days out. The first fall frost typically arrives around 12/02, about 277 frost-free days later.
The USDA Plant Hardiness Zone Map puts Keystone Heights in Zone 9a (20 to 25°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 9a around Keystone Heights has about 14 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
03/03 is the middle of 30 years of NOAA records, not a promise. Plant by 02/01 and you're betting against frost in roughly 9 years out of 10. 03/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Keystone Heights compares
At roughly 277 frost-free days, Keystone Heights places 5,028 of 40,283 ZIP codes in this dataset. Within FL, it ranks 1,460 of 1,609.
Learn more
the frost range explains how to read the range around Keystone Heights's dates instead of trusting one, and local microclimates explains what one yard in Keystone Heights can differ from the 32631 normal.