Austwell, TX 77990 Frost Dates
77990, near Austwell, TX: the frost window
Around 01/30 is the usual last spring frost, about 155 days away. Fall's first freeze usually shows up around 12/27, roughly 333 days after the last spring frost.
Austwell sits in USDA Zone 9b (25 to 30°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
Austwell's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Austwell's last frost
01/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/19 and only about 1 year in 10 sees frost after that.
Austwell against the rest of the dataset
Austwell's growing season runs about 333 days, ranking 2,857 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 114 of 2,558.
Learn more
Two guides worth reading on 77990: zone vs. frost date, on why Zone 9b and Austwell's frost date answer different questions, and the frost range, on how to read the range around Austwell's dates instead of trusting one.