St. Hedwig, TX 78152 Frost Dates
78152, near St. Hedwig, TX: the frost window
The last spring frost here typically falls around 02/21, about 177 days from today. Fall's first freeze usually shows up around 12/05, roughly 289 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 St. Hedwig, not a forecast for this year.
Stretching the season past the first frost
St. Hedwig'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 01/10 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.
St. Hedwig against the rest of the dataset
St. Hedwig's growing season runs about 289 days, ranking 4,556 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 676 of 2,558.
Learn more
Two guides worth reading on 78152: local microclimates, on what one yard in St. Hedwig can differ from the 78152 normal, and zone vs. frost date, on why Zone 9a and St. Hedwig's frost date answer different questions.