Copemish, MI 49625 Frost Dates
Frost dates for Copemish, MI, ZIP 49625
Typically, the last spring freeze lands around 05/07, roughly 252 days out. The first fall frost typically arrives around 10/20, about 163 frost-free days later.
Zone 5b (-15 to -10°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 Copemish, not a forecast for this year.
What to do before the first frost
Zone 5b around Copemish has about 8 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 05/07 isn't a guarantee
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Copemish compares
Copemish's growing season runs about 163 days, ranking 31,541 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 525 of 1,153.
Learn more
zone vs. frost date explains why Zone 5b and Copemish's frost date answer different questions, and the frost range explains how to read the range around Copemish's dates instead of trusting one.