Mount Pleasant, MI 48859 Frost Dates
Frost dates for Mount Pleasant, MI, ZIP 48859
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/20, about 171 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mount Pleasant 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 Mount Pleasant 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.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Pleasant compares
At roughly 171 frost-free days, Mount Pleasant places 28,601 of 40,283 ZIP codes in this dataset. Within MI, it ranks 288 of 1,153.
Learn more
the frost range explains how to read the range around Mount Pleasant's dates instead of trusting one, and local microclimates explains what one yard in Mount Pleasant can differ from the 48859 normal.