Harpersville, AL 35078 Frost Dates
Harpersville, AL: when does the frost end?
Around 03/31 is the usual last spring frost, about 215 days away. Fall's first freeze usually shows up around 11/02, roughly 216 days after the last spring frost.
Harpersville 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
With roughly 9 weeks until Harpersville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/31 isn't a guarantee
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/16 and only about 1 year in 10 sees frost after that.
Harpersville against the rest of the dataset
Harpersville's growing season runs about 216 days, ranking 13,820 of 40,283 US ZIP codes measured here, longest to shortest. Within AL, it ranks 669 of 809.
Learn more
Before leaning on 35078's figures: the frost range explains how to read the range around Harpersville's dates instead of trusting one, while local microclimates explains what one yard in Harpersville can differ from the 35078 normal.