San Antonio, FL 33544 Frost Dates
Frost dates for San Antonio, FL, ZIP 33544
Typically, the last spring freeze lands around 01/31, roughly 156 days out. The first fall frost typically arrives around 01/08, about 336 frost-free days later.
The USDA Plant Hardiness Zone Map puts San Antonio in Zone 9b (25 to 30°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 9b around San Antonio has about 19 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.
The actual range around San Antonio's last frost
01/31 is the middle of 30 years of NOAA records, not a promise. Plant by 01/03 and you're betting against frost in roughly 9 years out of 10. 02/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How San Antonio compares
At roughly 336 frost-free days, San Antonio places 2,730 of 40,283 ZIP codes in this dataset. Within FL, it ranks 1,097 of 1,609.
Learn more
the frost range explains how to read the range around San Antonio's dates instead of trusting one, and local microclimates explains what one yard in San Antonio can differ from the 33544 normal.