Houston, TX 77221 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.
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.
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.
The actual range around Houston's last frost
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
At roughly 300 frost-free days, Houston places 4,009 of 40,283 ZIP codes in this dataset. Within TX, it ranks 341 of 2,558.
Learn more
Before leaning on 77221's figures: local microclimates explains what one yard in Houston can differ from the 77221 normal, while zone vs. frost date explains why Zone 9b and Houston's frost date answer different questions.