Donna, TX 78537 Frost Dates
Frost dates for Donna, TX, ZIP 78537
Typically, the last spring freeze lands around 01/08, roughly 133 days out. The first fall frost typically arrives around 12/31, about 365 frost-free days later.
Zone 10a (30 to 35°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Donna, not a forecast for this year.
What to do before the first frost
Zone 10a around Donna has about 18 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.
The actual range around Donna's last frost
01/08 is the middle of 30 years of NOAA records, not a promise. Plant by 02/18 and you're betting against frost in roughly 9 years out of 10. 12/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Donna compares
Donna's growing season runs about 365 days, ranking 1,514 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 29 of 2,558.
Learn more
local microclimates explains what one yard in Donna can differ from the 78537 normal, and zone vs. frost date explains why Zone 10a and Donna's frost date answer different questions.