Robstown, TX 78406 Frost Dates
78406, near Robstown, TX: the frost window
Typically, the last spring freeze lands around 01/28, roughly 153 days out. Fall's first freeze usually shows up around 12/21, roughly 331 days after the last spring frost.
Robstown 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
Robstown's growing season runs out in roughly 16 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Robstown's last frost
01/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/16 and only about 1 year in 10 sees frost after that.
Robstown against the rest of the dataset
About 331 days separate Robstown's last and first frost, putting it 2,945 of 40,283 ZIP codes nationally. Within TX, it ranks 131 of 2,558.
Learn more
Two guides worth reading on 78406: the frost range, on how to read the range around Robstown's dates instead of trusting one, and local microclimates, on what one yard in Robstown can differ from the 78406 normal.