Houston, TX 77093 Frost Dates
Frost dates for Houston, TX, ZIP 77093
Typically, the last spring freeze lands around 02/13, roughly 169 days out. The first fall frost typically arrives around 12/09, about 300 frost-free days later.
Houston sits in USDA Zone 9b (25 to 30°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 9b around Houston has about 15 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 02/13 isn't a guarantee
02/13 is the middle of 30 years of NOAA records, not a promise. Plant by 01/12 and you're betting against frost in roughly 9 years out of 10. 03/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Houston compares
About 300 days separate Houston's last and first frost, putting it 3,991 of 40,283 ZIP codes nationally. Within TX, it ranks 323 of 2,558.
Learn more
local microclimates explains what one yard in Houston can differ from the 77093 normal, and zone vs. frost date explains why Zone 9b and Houston's frost date answer different questions.