Houston, TX 77290 Frost Dates
Houston, TX: when does the frost end?
The last spring frost here typically falls around 02/13, about 169 days from today. Fall's first freeze usually shows up around 12/09, roughly 300 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 15 weeks until Houston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/13 isn't a guarantee
02/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/12 and only about 1 year in 10 sees frost after that.
Houston against the rest of the dataset
Houston's growing season runs about 300 days, ranking 4,065 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 397 of 2,558.
Learn more
Before leaning on 77290's figures: zone vs. frost date explains why Zone 9b and Houston's frost date answer different questions, while the frost range explains how to read the range around Houston's dates instead of trusting one.