Johnson City, TX 78635 Frost Dates
Frost dates for Johnson City, TX, ZIP 78635
Typically, the last spring freeze lands around 03/01, roughly 185 days out. The first fall frost typically arrives around 12/01, about 276 frost-free days later.
The USDA Plant Hardiness Zone Map puts Johnson City in Zone 8b (15 to 20°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 8b around Johnson City 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 03/01 isn't a guarantee
03/01 is the middle of 30 years of NOAA records, not a promise. Plant by 01/31 and you're betting against frost in roughly 9 years out of 10. 03/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Johnson City compares
About 276 days separate Johnson City's last and first frost, putting it 5,108 of 40,283 ZIP codes nationally. Within TX, it ranks 837 of 2,558.
Learn more
zone vs. frost date explains why Zone 8b and Johnson City's frost date answer different questions, and the frost range explains how to read the range around Johnson City's dates instead of trusting one.