Marshall, TX 75671 Frost Dates
Frost dates for Marshall, TX, ZIP 75671
Typically, the last spring freeze lands around 03/11, roughly 195 days out. The first fall frost typically arrives around 11/17, about 250 frost-free days later.
The USDA Plant Hardiness Zone Map puts Marshall 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 Marshall has about 12 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 03/11 isn't a guarantee
03/11 is the middle of 30 years of NOAA records, not a promise. Plant by 02/20 and you're betting against frost in roughly 9 years out of 10. 03/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marshall compares
Marshall's growing season runs about 250 days, ranking 7,474 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,672 of 2,558.
Learn more
zone vs. frost date explains why Zone 8b and Marshall's frost date answer different questions, and the frost range explains how to read the range around Marshall's dates instead of trusting one.