Sullivan City, TX 78595 Frost Dates
Frost dates for Sullivan City, TX, ZIP 78595
The last spring frost here typically falls around 01/31, about 156 days from today. The first fall frost typically arrives around 12/17, about 321 frost-free days later.
The USDA Plant Hardiness Zone Map puts Sullivan City in Zone 10a (30 to 35°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 10a around Sullivan City has about 16 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
01/31 is the middle of 30 years of NOAA records, not a promise. Plant by 03/04 and you're betting against frost in roughly 9 years out of 10. 12/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sullivan City compares
At roughly 321 frost-free days, Sullivan City places 3,304 of 40,283 ZIP codes in this dataset. Within TX, it ranks 213 of 2,558.
Learn more
the frost range explains how to read the range around Sullivan City's dates instead of trusting one, and local microclimates explains what one yard in Sullivan City can differ from the 78595 normal.