Jefferson, TX 75657 Frost Dates
Frost dates for Jefferson, TX, ZIP 75657
Around 03/06 is the usual last spring frost, about 190 days away. The first fall frost typically arrives around 11/19, about 257 frost-free days later.
The USDA Plant Hardiness Zone Map puts Jefferson 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 Jefferson 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 03/06 isn't a guarantee
03/06 is the middle of 30 years of NOAA records, not a promise. Plant by 02/15 and you're betting against frost in roughly 9 years out of 10. 03/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jefferson compares
At roughly 257 frost-free days, Jefferson places 6,706 of 40,283 ZIP codes in this dataset. Within TX, it ranks 1,436 of 2,558.
Learn more
local microclimates explains what one yard in Jefferson can differ from the 75657 normal, and zone vs. frost date explains why Zone 8b and Jefferson's frost date answer different questions.