Mertens, TX 76666 Frost Dates
76666, near Mertens, TX: the frost window
The last spring frost here typically falls around 03/21, about 205 days from today. Fall's first freeze usually shows up around 11/10, roughly 235 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 Mertens, not a forecast for this year.
Stretching the season past the first frost
Mertens'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.
The actual range around Mertens's last frost
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 04/08 and only about 1 year in 10 sees frost after that.
Mertens against the rest of the dataset
At roughly 235 frost-free days, Mertens places 9,667 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,042 of 2,558.
Learn more
Two guides worth reading on 76666: the frost range, on how to read the range around Mertens's dates instead of trusting one, and local microclimates, on what one yard in Mertens can differ from the 76666 normal.