Saint Jo, TX 76239 Frost Dates
Frost dates for Saint Jo, TX, ZIP 76239
Typically, the last spring freeze lands around 04/01, roughly 216 days out. The first fall frost typically arrives around 11/04, about 219 frost-free days later.
The USDA Plant Hardiness Zone Map puts Saint Jo 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 Saint Jo 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.
The actual range around Saint Jo's last frost
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/12 and you're betting against frost in roughly 9 years out of 10. 04/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Saint Jo compares
At roughly 219 frost-free days, Saint Jo places 13,075 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,322 of 2,558.
Learn more
local microclimates explains what one yard in Saint Jo can differ from the 76239 normal, and zone vs. frost date explains why Zone 8a and Saint Jo's frost date answer different questions.