Killen, AL 35645 Frost Dates
Killen, AL: when does the frost end?
Typically, the last spring freeze lands around 03/29, roughly 213 days out. Fall's first freeze usually shows up around 11/04, roughly 219 days after the last spring frost.
Zone 8a (10 to 15°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 Killen, not a forecast for this year.
Stretching the season past the first frost
With roughly 10 weeks until Killen's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/29 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 04/15 and only about 1 year in 10 sees frost after that.
Killen against the rest of the dataset
Killen's growing season runs about 219 days, ranking 13,069 of 40,283 US ZIP codes measured here, longest to shortest. Within AL, it ranks 654 of 809.
Learn more
Before leaning on 35645's figures: zone vs. frost date explains why Zone 8a and Killen's frost date answer different questions, while the frost range explains how to read the range around Killen's dates instead of trusting one.