Mount Clemens, MI 48090 Frost Dates
Frost dates for Mount Clemens, MI, ZIP 48090
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/24, about 174 frost-free days later.
Zone 6b (-5 to 0°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 Mount Clemens, not a forecast for this year.
What to do before the first frost
Zone 6b around Mount Clemens 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.
The actual range around Mount Clemens'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. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Clemens compares
Mount Clemens's growing season runs about 174 days, ranking 27,392 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 172 of 1,153.
Learn more
zone vs. frost date explains why Zone 6b and Mount Clemens's frost date answer different questions, and the frost range explains how to read the range around Mount Clemens's dates instead of trusting one.