Grandville, MI 49418 Frost Dates
Frost dates for Grandville, MI, ZIP 49418
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/10, about 157 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 Grandville, not a forecast for this year.
What to do before the first frost
Zone 6a around Grandville 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.
The actual range around Grandville's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grandville compares
At roughly 157 frost-free days, Grandville places 33,252 of 40,283 ZIP codes in this dataset. Within MI, it ranks 699 of 1,153.
Learn more
local microclimates explains what one yard in Grandville can differ from the 49418 normal, and zone vs. frost date explains why Zone 6a and Grandville's frost date answer different questions.