Alto, TX 75943 Frost Dates
When can you plant in Alto, TX?
Around 03/07 is the usual last spring frost, about 191 days away. The first fall frost typically arrives around 11/25, about 263 frost-free days later.
The USDA Plant Hardiness Zone Map puts Alto in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 13 weeks of growing season left in Alto before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Alto's last frost
03/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/15 and you're betting against frost in roughly 9 years out of 10. 03/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alto compares
About 263 days separate Alto's last and first frost, putting it 6,131 of 40,283 ZIP codes nationally. Within TX, it ranks 1,123 of 2,558.
Learn more
zone vs. frost date covers why Zone 8b and Alto's frost date answer different questions. the frost range covers how to read the range around Alto's dates instead of trusting one.