Helotes, TX 78254 Frost Dates
Frost dates for Helotes, TX, ZIP 78254
Typically, the last spring freeze lands around 02/18, roughly 174 days out. The first fall frost typically arrives around 12/09, about 296 frost-free days later.
The USDA Plant Hardiness Zone Map puts Helotes 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 Helotes has about 15 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 Helotes's last frost
02/18 is the middle of 30 years of NOAA records, not a promise. Plant by 01/18 and you're betting against frost in roughly 9 years out of 10. 03/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Helotes compares
At roughly 296 frost-free days, Helotes places 4,239 of 40,283 ZIP codes in this dataset. Within TX, it ranks 508 of 2,558.
Learn more
local microclimates explains what one yard in Helotes can differ from the 78254 normal, and zone vs. frost date explains why Zone 9a and Helotes's frost date answer different questions.