Hillsboro, TX 76645 Frost Dates
When can you plant in Hillsboro, TX?
Around 03/21 is the usual last spring frost, about 205 days away. The first fall frost typically arrives around 11/10, about 235 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hillsboro 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 11 weeks of growing season left in Hillsboro before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Hillsboro's last frost
03/21 is the middle of 30 years of NOAA records, not a promise. Plant by 03/02 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hillsboro compares
Hillsboro's growing season runs about 235 days, ranking 9,585 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 2,021 of 2,558.
Learn more
zone vs. frost date covers why Zone 8b and Hillsboro's frost date answer different questions. the frost range covers how to read the range around Hillsboro's dates instead of trusting one.