Brownsville, TX 78526 Frost Dates
78526, near Brownsville, TX: the frost window
Around 01/06 is the usual last spring frost, about 131 days away. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Brownsville in Zone 10a (30 to 35°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
Brownsville's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/06 isn't a guarantee
01/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/11 and only about 1 year in 10 sees frost after that.
Brownsville against the rest of the dataset
Brownsville's growing season runs about 365 days, ranking 361 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 6 of 2,558.
Learn more
Two guides worth reading on 78526: the frost range, on how to read the range around Brownsville's dates instead of trusting one, and local microclimates, on what one yard in Brownsville can differ from the 78526 normal.