Marcellus, MI 49067 Frost Dates
Frost dates for Marcellus, MI, ZIP 49067
Around 05/04 is the usual last spring frost, about 249 days away. The first fall frost typically arrives around 10/11, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts Marcellus in Zone 6a (-10 to -5°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 6a around Marcellus has about 6 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 05/04 isn't a guarantee
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marcellus compares
About 158 days separate Marcellus's last and first frost, putting it 33,066 of 40,283 ZIP codes nationally. Within MI, it ranks 673 of 1,153.
Learn more
local microclimates explains what one yard in Marcellus can differ from the 49067 normal, and zone vs. frost date explains why Zone 6a and Marcellus's frost date answer different questions.