Huntsville, TX 77340 Frost Dates
Huntsville, TX: when does the frost end?
Around 03/02 is the usual last spring frost, about 186 days away. Fall's first freeze usually shows up around 11/26, roughly 272 days after the last spring frost.
Zone 9a (20 to 25°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 Huntsville, not a forecast for this year.
Stretching the season past the first frost
With roughly 13 weeks until Huntsville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Huntsville's last frost
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/24 and only about 1 year in 10 sees frost after that.
Huntsville against the rest of the dataset
Huntsville's growing season runs about 272 days, ranking 5,321 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 974 of 2,558.
Learn more
Before leaning on 77340's figures: zone vs. frost date explains why Zone 9a and Huntsville's frost date answer different questions, while the frost range explains how to read the range around Huntsville's dates instead of trusting one.