Santa Anna, TX 76873 Frost Dates
76873, near Santa Anna, TX: the frost window
Around 03/18 is the usual last spring frost, about 202 days away. Fall's first freeze usually shows up around 11/12, roughly 239 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 Santa Anna, not a forecast for this year.
Stretching the season past the first frost
Santa Anna'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 03/18 isn't a guarantee
03/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 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.
Santa Anna against the rest of the dataset
At roughly 239 frost-free days, Santa Anna places 8,853 of 40,283 ZIP codes in this dataset. Within TX, it ranks 1,965 of 2,558.
Learn more
Two guides worth reading on 76873: local microclimates, on what one yard in Santa Anna can differ from the 76873 normal, and zone vs. frost date, on why Zone 8b and Santa Anna's frost date answer different questions.