Amarillo, TX 79109 Frost Dates
79109, near Amarillo, TX: the frost window
Around 04/13 is the usual last spring frost, about 228 days away. Fall's first freeze usually shows up around 10/27, roughly 195 days after the last spring frost.
Amarillo sits in USDA Zone 7a (0 to 5°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
Amarillo's growing season runs out in roughly 9 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
04/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Amarillo against the rest of the dataset
At roughly 195 frost-free days, Amarillo places 19,136 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,471 of 2,558.
Learn more
Two guides worth reading on 79109: local microclimates, on what one yard in Amarillo can differ from the 79109 normal, and zone vs. frost date, on why Zone 7a and Amarillo's frost date answer different questions.