Impact, TX 79601 Frost Dates
79601, near Impact, TX: the frost window
Typically, the last spring freeze lands around 03/20, roughly 204 days out. Fall's first freeze usually shows up around 11/10, roughly 236 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Impact in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Impact's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/20 isn't a guarantee
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Impact against the rest of the dataset
Impact's growing season runs about 236 days, ranking 9,530 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 2,016 of 2,558.
Learn more
Two guides worth reading on 79601: the frost range, on how to read the range around Impact's dates instead of trusting one, and local microclimates, on what one yard in Impact can differ from the 79601 normal.