Duncanville, TX 75137 Frost Dates
Frost dates for Duncanville, TX, ZIP 75137
The last spring frost here typically falls around 03/20, about 204 days from today. The first fall frost typically arrives around 11/13, about 236 frost-free days later.
The USDA Plant Hardiness Zone Map puts Duncanville 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
Zone 8b around Duncanville 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.
How much risk comes with planting early here
03/20 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 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 Duncanville compares
At roughly 236 frost-free days, Duncanville places 9,311 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,008 of 2,558.
Learn more
zone vs. frost date explains why Zone 8b and Duncanville's frost date answer different questions, and the frost range explains how to read the range around Duncanville's dates instead of trusting one.