Dauphin Island, AL 36528 Frost Dates
Frost dates for Dauphin Island, AL, ZIP 36528
The last spring frost here typically falls around 01/31, about 156 days from today. The first fall frost typically arrives around 01/06, about 340 frost-free days later.
Zone 9b (25 to 30°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 Dauphin Island, not a forecast for this year.
What to do before the first frost
Zone 9b around Dauphin Island has about 19 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Dauphin Island's last frost
01/31 is the middle of 30 years of NOAA records, not a promise. Plant by 01/01 and you're betting against frost in roughly 9 years out of 10. 02/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dauphin Island compares
At roughly 340 frost-free days, Dauphin Island places 2,629 of 40,283 ZIP codes in this dataset. Within AL, it ranks 2 of 809.
Learn more
zone vs. frost date explains why Zone 9b and Dauphin Island's frost date answer different questions, and the frost range explains how to read the range around Dauphin Island's dates instead of trusting one.