Houston, TX 77377 Frost Dates
Houston, TX: when does the frost end?
Around 02/13 is the usual last spring frost, about 169 days away. Fall's first freeze usually shows up around 12/09, roughly 300 days after the last spring frost.
Houston sits in USDA Zone 9a (20 to 25°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
About 300 days separate Houston's last and first frost, putting it 4,074 of 40,283 ZIP codes nationally. Within TX, it ranks 406 of 2,558.
Learn more
Before leaning on 77377's figures: the frost range explains how to read the range around Houston's dates instead of trusting one, while local microclimates explains what one yard in Houston can differ from the 77377 normal.