Rio Bravo, TX 78371 Frost Dates
Rio Bravo, TX: when does the frost end?
The last spring frost here typically falls around 01/30, about 155 days from today. Fall's first freeze usually shows up around 12/18, roughly 323 days after the last spring frost.
Rio Bravo 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 16 weeks until Rio Bravo's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/30 isn't a guarantee
01/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/01 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.
Rio Bravo against the rest of the dataset
About 323 days separate Rio Bravo's last and first frost, putting it 3,269 of 40,283 ZIP codes nationally. Within TX, it ranks 201 of 2,558.
Learn more
Before leaning on 78371's figures: the frost range explains how to read the range around Rio Bravo's dates instead of trusting one, while local microclimates explains what one yard in Rio Bravo can differ from the 78371 normal.