Houston, TX 77277 Frost Dates
Frost dates for Houston, TX, ZIP 77277
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.
Zone 9b (25 to 30°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 Houston, not a forecast for this year.
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.
The actual range around Houston's last frost
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 4,057 of 40,283 ZIP codes nationally. Within TX, it ranks 389 of 2,558.
Learn more
local microclimates explains what one yard in Houston can differ from the 77277 normal, and zone vs. frost date explains why Zone 9b and Houston's frost date answer different questions.