Huntsville, AL 35804 Frost Dates
35804, near Huntsville, AL: the frost window
Around 03/24 is the usual last spring frost, about 208 days away. Fall's first freeze usually shows up around 11/08, roughly 229 days after the last spring frost.
Huntsville sits in USDA Zone 8a (10 to 15°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.
Stretching the season past the first frost
Huntsville's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Huntsville against the rest of the dataset
At roughly 229 frost-free days, Huntsville places 10,533 of 40,283 ZIP codes in this dataset. Within AL, it ranks 522 of 809.
Learn more
Two guides worth reading on 35804: the frost range, on how to read the range around Huntsville's dates instead of trusting one, and local microclimates, on what one yard in Huntsville can differ from the 35804 normal.