Madison Heights, MI 48071 Frost Dates
Frost dates for Madison Heights, MI, ZIP 48071
Typically, the last spring freeze lands around 04/21, roughly 236 days out. The first fall frost typically arrives around 10/31, about 190 frost-free days later.
Zone 6b (-5 to 0°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 Madison Heights, not a forecast for this year.
What to do before the first frost
Zone 6b around Madison Heights has about 9 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.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Madison Heights compares
At roughly 190 frost-free days, Madison Heights places 21,047 of 40,283 ZIP codes in this dataset. Within MI, it ranks 22 of 1,153.
Learn more
local microclimates explains what one yard in Madison Heights can differ from the 48071 normal, and zone vs. frost date explains why Zone 6b and Madison Heights's frost date answer different questions.