Detroit, TX 75412 Frost Dates
Frost dates for Detroit, TX, ZIP 75412
Around 03/20 is the usual last spring frost, about 204 days away. The first fall frost typically arrives around 11/10, about 233 frost-free days later.
The USDA Plant Hardiness Zone Map puts Detroit in Zone 8a (10 to 15°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 8a around Detroit 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. 04/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Detroit compares
At roughly 233 frost-free days, Detroit places 9,951 of 40,283 ZIP codes in this dataset. Within TX, it ranks 2,105 of 2,558.
Learn more
local microclimates explains what one yard in Detroit can differ from the 75412 normal, and zone vs. frost date explains why Zone 8a and Detroit's frost date answer different questions.