Castleberry, AL 36432 Frost Dates
36432, near Castleberry, AL: the frost window
The last spring frost here typically falls around 03/10, about 194 days from today. Fall's first freeze usually shows up around 11/17, roughly 251 days after the last spring frost.
Zone 8b (15 to 20°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 Castleberry, not a forecast for this year.
Stretching the season past the first frost
Castleberry's growing season runs out in roughly 12 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
03/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/31 and only about 1 year in 10 sees frost after that.
Castleberry against the rest of the dataset
About 251 days separate Castleberry's last and first frost, putting it 7,392 of 40,283 ZIP codes nationally. Within AL, it ranks 201 of 809.
Learn more
Two guides worth reading on 36432: zone vs. frost date, on why Zone 8b and Castleberry's frost date answer different questions, and the frost range, on how to read the range around Castleberry's dates instead of trusting one.