Coloma, MI 49039 Frost Dates
Frost dates for Coloma, MI, ZIP 49039
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/15, about 161 frost-free days later.
The USDA Plant Hardiness Zone Map puts Coloma 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 Coloma 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.
The actual range around Coloma's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Coloma compares
About 161 days separate Coloma's last and first frost, putting it 32,082 of 40,283 ZIP codes nationally. Within MI, it ranks 583 of 1,153.
Learn more
local microclimates explains what one yard in Coloma can differ from the 49039 normal, and zone vs. frost date explains why Zone 6b and Coloma's frost date answer different questions.