Petronila, TX 78472 Frost Dates
Frost dates for Petronila, TX, ZIP 78472
Typically, the last spring freeze lands around 01/28, roughly 153 days out. The first fall frost typically arrives around 12/21, about 331 frost-free days later.
Petronila sits in USDA Zone 10a (30 to 35°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 10a around Petronila has about 16 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
01/28 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 12/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Petronila compares
Petronila's growing season runs about 331 days, ranking 2,958 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 133 of 2,558.
Learn more
local microclimates explains what one yard in Petronila can differ from the 78472 normal, and zone vs. frost date explains why Zone 10a and Petronila's frost date answer different questions.