Thrall, TX 76578 Frost Dates
Frost dates for Thrall, TX, ZIP 76578
Around 03/08 is the usual last spring frost, about 192 days away. The first fall frost typically arrives around 11/21, about 257 frost-free days later.
Thrall sits in USDA Zone 9a (20 to 25°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 9a around Thrall has about 12 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
03/08 is the middle of 30 years of NOAA records, not a promise. Plant by 02/14 and you're betting against frost in roughly 9 years out of 10. 03/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Thrall compares
Thrall's growing season runs about 257 days, ranking 6,732 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,448 of 2,558.
Learn more
local microclimates explains what one yard in Thrall can differ from the 76578 normal, and zone vs. frost date explains why Zone 9a and Thrall's frost date answer different questions.