Rio Bravo, TX 78369 Frost Dates
When can you plant in Rio Bravo, TX?
Typically, the last spring freeze lands around 01/30, roughly 155 days out. The first fall frost typically arrives around 12/18, about 323 frost-free days later.
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.
What to do before the first frost
About 16 weeks of growing season left in Rio Bravo before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/30 isn't a guarantee
01/30 is the middle of 30 years of NOAA records, not a promise. Plant by 03/01 and you're betting against frost in roughly 9 years out of 10. 12/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rio Bravo compares
Rio Bravo's growing season runs about 323 days, ranking 3,268 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 200 of 2,558.
Learn more
zone vs. frost date covers why Zone 9b and Rio Bravo's frost date answer different questions. the frost range covers how to read the range around Rio Bravo's dates instead of trusting one.