Carbon Hill, AL 35573 Frost Dates
35573, near Carbon Hill, AL: the frost window
Typically, the last spring freeze lands around 03/30, roughly 214 days out. Fall's first freeze usually shows up around 11/04, roughly 220 days after the last spring frost.
Carbon Hill 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
Carbon 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.
How much risk comes with planting early here
03/30 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.
Carbon Hill against the rest of the dataset
At roughly 220 frost-free days, Carbon Hill places 12,835 of 40,283 ZIP codes in this dataset. Within AL, it ranks 641 of 809.
Learn more
Two guides worth reading on 35573: zone vs. frost date, on why Zone 8a and Carbon Hill's frost date answer different questions, and the frost range, on how to read the range around Carbon Hill's dates instead of trusting one.