Sealy, TX 77474 Frost Dates
77474, near Sealy, 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.
The USDA Plant Hardiness Zone Map puts Sealy in Zone 9a (20 to 25°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
Sealy'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.
Sealy against the rest of the dataset
Sealy's growing season runs about 285 days, ranking 4,630 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 694 of 2,558.
Learn more
Two guides worth reading on 77474: the frost range, on how to read the range around Sealy's dates instead of trusting one, and local microclimates, on what one yard in Sealy can differ from the 77474 normal.