Brownsville, TX 78520 Frost Dates
Brownsville, TX: when does the frost end?
Typically, the last spring freeze lands around 01/06, roughly 131 days out. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
Brownsville sits in USDA Zone 10a (30 to 35°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 18 weeks until Brownsville'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
01/06 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 358 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 3 of 2,558.
Learn more
Before leaning on 78520's figures: the frost range explains how to read the range around Brownsville's dates instead of trusting one, while local microclimates explains what one yard in Brownsville can differ from the 78520 normal.