Baytown, TX 77521 Frost Dates
Frost dates for Baytown, TX, ZIP 77521
The last spring frost here typically falls around 02/20, about 176 days from today. The first fall frost typically arrives around 12/04, about 292 frost-free days later.
Baytown sits in USDA Zone 9b (25 to 30°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 9b around Baytown has about 14 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
02/20 is the middle of 30 years of NOAA records, not a promise. Plant by 01/23 and you're betting against frost in roughly 9 years out of 10. 03/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Baytown compares
At roughly 292 frost-free days, Baytown places 4,317 of 40,283 ZIP codes in this dataset. Within TX, it ranks 534 of 2,558.
Learn more
the frost range explains how to read the range around Baytown's dates instead of trusting one, and local microclimates explains what one yard in Baytown can differ from the 77521 normal.