Houston, TX 77003 Frost Dates
77003, near Houston, TX: the frost window
Around 01/30 is the usual last spring frost, about 155 days away. Fall's first freeze usually shows up around 12/28, roughly 330 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Houston in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Houston's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Houston's last frost
01/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/29 and only about 1 year in 10 sees frost after that.
Houston against the rest of the dataset
About 330 days separate Houston's last and first frost, putting it 2,960 of 40,283 ZIP codes nationally. Within TX, it ranks 135 of 2,558.
Learn more
Two guides worth reading on 77003: zone vs. frost date, on why Zone 9b and Houston's frost date answer different questions, and the frost range, on how to read the range around Houston's dates instead of trusting one.