Hillsboro, TX 76650 Frost Dates
Frost dates for Hillsboro, TX, ZIP 76650
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.
Hillsboro sits in USDA Zone 8b (15 to 20°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.
What to do before the first frost
Zone 8b around Hillsboro has about 11 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 03/21 isn't a guarantee
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
At roughly 235 frost-free days, Hillsboro places 9,586 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,022 of 2,558.
Learn more
local microclimates explains what one yard in Hillsboro can differ from the 76650 normal, and zone vs. frost date explains why Zone 8b and Hillsboro's frost date answer different questions.