Humble, TX 77346 Frost Dates
Frost dates for Humble, TX, ZIP 77346
Around 02/13 is the usual last spring frost, about 169 days away. The first fall frost typically arrives around 12/09, about 300 frost-free days later.
The USDA Plant Hardiness Zone Map puts Humble in Zone 9b (25 to 30°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 9b around Humble has about 15 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 Humble's last frost
02/13 is the middle of 30 years of NOAA records, not a promise. Plant by 01/12 and you're betting against frost in roughly 9 years out of 10. 03/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Humble compares
About 300 days separate Humble's last and first frost, putting it 4,099 of 40,283 ZIP codes nationally. Within TX, it ranks 429 of 2,558.
Learn more
zone vs. frost date explains why Zone 9b and Humble's frost date answer different questions, and the frost range explains how to read the range around Humble's dates instead of trusting one.