Oak Hill, AL 36761 Frost Dates
36761, near Oak Hill, AL: the frost window
Around 03/21 is the usual last spring frost, about 205 days away. Fall's first freeze usually shows up around 11/07, roughly 233 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Oak Hill in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Oak Hill'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 03/21 isn't a guarantee
03/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Oak Hill against the rest of the dataset
Oak Hill's growing season runs about 233 days, ranking 10,013 of 40,283 US ZIP codes measured here, longest to shortest. Within AL, it ranks 454 of 809.
Learn more
Two guides worth reading on 36761: zone vs. frost date, on why Zone 8b and Oak Hill's frost date answer different questions, and the frost range, on how to read the range around Oak Hill's dates instead of trusting one.