Rio Hondo, TX 78583 Frost Dates
Frost dates for Rio Hondo, TX, ZIP 78583
The last spring frost here typically falls around 01/08, about 133 days from today. The first fall frost typically arrives around 12/29, about 357 frost-free days later.
The USDA Plant Hardiness Zone Map puts Rio Hondo in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 10a around Rio Hondo has about 18 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Rio Hondo's last frost
01/08 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 12/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rio Hondo compares
At roughly 357 frost-free days, Rio Hondo places 2,090 of 40,283 ZIP codes in this dataset. Within TX, it ranks 58 of 2,558.
Learn more
the frost range explains how to read the range around Rio Hondo's dates instead of trusting one, and local microclimates explains what one yard in Rio Hondo can differ from the 78583 normal.