Highland Haven, TX 78609 Frost Dates
Frost dates for Highland Haven, TX, ZIP 78609
Around 03/06 is the usual last spring frost, about 190 days away. The first fall frost typically arrives around 11/23, about 262 frost-free days later.
Zone 8b (15 to 20°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 Highland Haven, not a forecast for this year.
What to do before the first frost
Zone 8b around Highland Haven 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.
The actual range around Highland Haven's last frost
03/06 is the middle of 30 years of NOAA records, not a promise. Plant by 02/13 and you're betting against frost in roughly 9 years out of 10. 03/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Highland Haven compares
Highland Haven's growing season runs about 262 days, ranking 6,247 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,154 of 2,558.
Learn more
local microclimates explains what one yard in Highland Haven can differ from the 78609 normal, and zone vs. frost date explains why Zone 8b and Highland Haven's frost date answer different questions.