La Porte, TX 77571 Frost Dates
La Porte, TX: when does the frost end?
Typically, the last spring freeze lands around 01/31, roughly 156 days out. Fall's first freeze usually shows up around 12/14, roughly 317 days after the last spring frost.
La Porte 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 La Porte's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/25 and only about 1 year in 10 sees frost after that.
La Porte against the rest of the dataset
La Porte's growing season runs about 317 days, ranking 3,369 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 258 of 2,558.
Learn more
Before leaning on 77571's figures: local microclimates explains what one yard in La Porte can differ from the 77571 normal, while zone vs. frost date explains why Zone 9b and La Porte's frost date answer different questions.