Houston, TX 77383 Frost Dates
Frost dates for Houston, TX, ZIP 77383
Around 02/13 is the usual last spring frost, about 169 days away. 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.
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
At roughly 300 frost-free days, Houston places 4,075 of 40,283 ZIP codes in this dataset. Within TX, it ranks 407 of 2,558.
Learn more
local microclimates explains what one yard in Houston can differ from the 77383 normal, and zone vs. frost date explains why Zone 9b and Houston's frost date answer different questions.