Denison, TX 75020 Frost Dates
Frost dates for Denison, TX, ZIP 75020
Typically, the last spring freeze lands around 03/14, roughly 198 days out. The first fall frost typically arrives around 11/19, about 250 frost-free days later.
Denison sits in USDA Zone 8a (10 to 15°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 8a around Denison 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.
How much risk comes with planting early here
03/14 is the middle of 30 years of NOAA records, not a promise. Plant by 02/25 and you're betting against frost in roughly 9 years out of 10. 04/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Denison compares
About 250 days separate Denison's last and first frost, putting it 7,471 of 40,283 ZIP codes nationally. Within TX, it ranks 1,669 of 2,558.
Learn more
local microclimates explains what one yard in Denison can differ from the 75020 normal, and zone vs. frost date explains why Zone 8a and Denison's frost date answer different questions.