Olmos Park, TX 78210 Frost Dates
78210, near Olmos Park, TX: the frost window
Typically, the last spring freeze lands around 02/20, roughly 176 days out. Fall's first freeze usually shows up around 12/03, roughly 291 days after the last spring frost.
Olmos Park sits in USDA Zone 9a (20 to 25°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
Olmos Park'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 02/20 isn't a guarantee
02/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/13 and only about 1 year in 10 sees frost after that.
Olmos Park against the rest of the dataset
About 291 days separate Olmos Park's last and first frost, putting it 4,454 of 40,283 ZIP codes nationally. Within TX, it ranks 607 of 2,558.
Learn more
Two guides worth reading on 78210: local microclimates, on what one yard in Olmos Park can differ from the 78210 normal, and zone vs. frost date, on why Zone 9a and Olmos Park's frost date answer different questions.