Leon Valley, TX 78240 Frost Dates
78240, near Leon Valley, TX: the frost window
Around 02/18 is the usual last spring frost, about 174 days away. Fall's first freeze usually shows up around 12/09, roughly 296 days after the last spring frost.
Leon Valley 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
Leon Valley's growing season runs out in roughly 15 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
02/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/16 and only about 1 year in 10 sees frost after that.
Leon Valley against the rest of the dataset
Leon Valley's growing season runs about 296 days, ranking 4,235 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 504 of 2,558.
Learn more
Two guides worth reading on 78240: local microclimates, on what one yard in Leon Valley can differ from the 78240 normal, and zone vs. frost date, on why Zone 9a and Leon Valley's frost date answer different questions.