Grosse Pointe Park, MI 48215 Frost Dates
Frost dates for Grosse Pointe Park, MI, ZIP 48215
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 Grosse Pointe Park, not a forecast for this year.
What to do before the first frost
Zone 6b around Grosse Pointe Park 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.
How much risk comes with planting early here
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 Grosse Pointe Park compares
At roughly 190 frost-free days, Grosse Pointe Park places 21,092 of 40,283 ZIP codes in this dataset. Within MI, it ranks 36 of 1,153.
Learn more
local microclimates explains what one yard in Grosse Pointe Park can differ from the 48215 normal, and zone vs. frost date explains why Zone 6b and Grosse Pointe Park's frost date answer different questions.