Bellville, TX 78931 Frost Dates
78931, near Bellville, TX: the frost window
Typically, the last spring freeze lands around 02/21, roughly 177 days out. Fall's first freeze usually shows up around 12/01, roughly 285 days after the last spring frost.
Bellville sits in USDA Zone 9a (20 to 25°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
Bellville's growing season runs out in roughly 14 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 02/21 isn't a guarantee
02/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/14 and only about 1 year in 10 sees frost after that.
Bellville against the rest of the dataset
About 285 days separate Bellville's last and first frost, putting it 4,635 of 40,283 ZIP codes nationally. Within TX, it ranks 699 of 2,558.
Learn more
Two guides worth reading on 78931: zone vs. frost date, on why Zone 9a and Bellville's frost date answer different questions, and the frost range, on how to read the range around Bellville's dates instead of trusting one.