Presidio, TX 79846 Frost Dates
79846, near Presidio, TX: the frost window
Around 03/21 is the usual last spring frost, about 205 days away. Fall's first freeze usually shows up around 11/11, roughly 237 days after the last spring frost.
Zone 8b (15 to 20°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 Presidio, not a forecast for this year.
Stretching the season past the first frost
Presidio's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/21 isn't a guarantee
03/21 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 04/07 and only about 1 year in 10 sees frost after that.
Presidio against the rest of the dataset
Presidio's growing season runs about 237 days, ranking 9,112 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,996 of 2,558.
Learn more
Two guides worth reading on 79846: zone vs. frost date, on why Zone 8b and Presidio's frost date answer different questions, and the frost range, on how to read the range around Presidio's dates instead of trusting one.