Mount Clemens, MI 48318 Frost Dates
48318, near Mount Clemens, MI: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/24, roughly 174 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mount Clemens in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Mount Clemens's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Mount Clemens against the rest of the dataset
About 174 days separate Mount Clemens's last and first frost, putting it 27,394 of 40,283 ZIP codes nationally. Within MI, it ranks 174 of 1,153.
Learn more
Two guides worth reading on 48318: the frost range, on how to read the range around Mount Clemens's dates instead of trusting one, and local microclimates, on what one yard in Mount Clemens can differ from the 48318 normal.