South Mountain, TX 76558 Frost Dates
Frost dates for South Mountain, TX, ZIP 76558
Typically, the last spring freeze lands around 03/14, roughly 198 days out. The first fall frost typically arrives around 11/17, about 247 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for South Mountain, not a forecast for this year.
What to do before the first frost
Zone 8b around South Mountain 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
03/14 is the middle of 30 years of NOAA records, not a promise. Plant by 02/24 and you're betting against frost in roughly 9 years out of 10. 04/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How South Mountain compares
About 247 days separate South Mountain's last and first frost, putting it 7,879 of 40,283 ZIP codes nationally. Within TX, it ranks 1,785 of 2,558.
Learn more
zone vs. frost date explains why Zone 8b and South Mountain's frost date answer different questions, and the frost range explains how to read the range around South Mountain's dates instead of trusting one.