Big Wells, TX 78830 Frost Dates
Frost dates for Big Wells, TX, ZIP 78830
Around 02/11 is the usual last spring frost, about 167 days away. The first fall frost typically arrives around 12/03, about 300 frost-free days later.
The USDA Plant Hardiness Zone Map puts Big Wells 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 Big Wells 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.
Why 02/11 isn't a guarantee
02/11 is the middle of 30 years of NOAA records, not a promise. Plant by 01/05 and you're betting against frost in roughly 9 years out of 10. 03/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Big Wells compares
At roughly 300 frost-free days, Big Wells places 4,144 of 40,283 ZIP codes in this dataset. Within TX, it ranks 470 of 2,558.
Learn more
the frost range explains how to read the range around Big Wells's dates instead of trusting one, and local microclimates explains what one yard in Big Wells can differ from the 78830 normal.