Robstown, TX 78380 Frost Dates
Frost dates for Robstown, TX, ZIP 78380
The last spring frost here typically falls around 01/26, about 151 days from today. The first fall frost typically arrives around 12/24, about 336 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Robstown, not a forecast for this year.
What to do before the first frost
Zone 9b around Robstown has about 17 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.
Why 01/26 isn't a guarantee
01/26 is the middle of 30 years of NOAA records, not a promise. Plant by 03/03 and you're betting against frost in roughly 9 years out of 10. 12/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Robstown compares
At roughly 336 frost-free days, Robstown places 2,724 of 40,283 ZIP codes in this dataset. Within TX, it ranks 100 of 2,558.
Learn more
zone vs. frost date explains why Zone 9b and Robstown's frost date answer different questions, and the frost range explains how to read the range around Robstown's dates instead of trusting one.