Colon, MI 49040 Frost Dates
Frost dates for Colon, MI, ZIP 49040
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/19, about 170 frost-free days later.
Zone 6a (-10 to -5°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 Colon, not a forecast for this year.
What to do before the first frost
Zone 6a around Colon 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 Colon's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Colon compares
At roughly 170 frost-free days, Colon places 29,100 of 40,283 ZIP codes in this dataset. Within MI, it ranks 331 of 1,153.
Learn more
local microclimates explains what one yard in Colon can differ from the 49040 normal, and zone vs. frost date explains why Zone 6a and Colon's frost date answer different questions.