San Antonio, FL 33593 Frost Dates
Frost dates for San Antonio, FL, ZIP 33593
The last spring frost here typically falls around 03/01, about 185 days from today. The first fall frost typically arrives around 12/05, about 281 frost-free days later.
San Antonio sits in USDA Zone 9b (25 to 30°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 9b around San Antonio 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
03/01 is the middle of 30 years of NOAA records, not a promise. Plant by 01/30 and you're betting against frost in roughly 9 years out of 10. 03/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How San Antonio compares
San Antonio's growing season runs about 281 days, ranking 4,809 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 1,415 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 33593 normal.