Hallettsville, TX 77987 Frost Dates
77987, near Hallettsville, TX: the frost window
Around 03/02 is the usual last spring frost, about 186 days away. Fall's first freeze usually shows up around 11/30, roughly 276 days after the last spring frost.
Zone 9a (20 to 25°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 Hallettsville, not a forecast for this year.
Stretching the season past the first frost
Hallettsville's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/23 and only about 1 year in 10 sees frost after that.
Hallettsville against the rest of the dataset
About 276 days separate Hallettsville's last and first frost, putting it 5,097 of 40,283 ZIP codes nationally. Within TX, it ranks 835 of 2,558.
Learn more
Two guides worth reading on 77987: the frost range, on how to read the range around Hallettsville's dates instead of trusting one, and local microclimates, on what one yard in Hallettsville can differ from the 77987 normal.