Horizon City, TX 79916 Frost Dates
79916, near Horizon City, TX: the frost window
Typically, the last spring freeze lands around 03/02, roughly 186 days out. Fall's first freeze usually shows up around 11/20, roughly 261 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Horizon City in Zone 8b (15 to 20°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
Horizon City's growing season runs out in roughly 12 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
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/19 and only about 1 year in 10 sees frost after that.
Horizon City against the rest of the dataset
At roughly 261 frost-free days, Horizon City places 6,384 of 40,283 ZIP codes in this dataset. Within TX, it ranks 1,284 of 2,558.
Learn more
Two guides worth reading on 79916: local microclimates, on what one yard in Horizon City can differ from the 79916 normal, and zone vs. frost date, on why Zone 8b and Horizon City's frost date answer different questions.