Birmingham, MI 48084 Frost Dates
Frost dates for Birmingham, MI, ZIP 48084
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/17, about 165 frost-free days later.
The USDA Plant Hardiness Zone Map puts Birmingham in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Birmingham has about 7 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.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Birmingham compares
About 165 days separate Birmingham's last and first frost, putting it 30,512 of 40,283 ZIP codes nationally. Within MI, it ranks 440 of 1,153.
Learn more
zone vs. frost date explains why Zone 6b and Birmingham's frost date answer different questions, and the frost range explains how to read the range around Birmingham's dates instead of trusting one.