Cheboygan, MI 49721 Frost Dates
49721, near Cheboygan, MI: the frost window
Around 05/11 is the usual last spring frost, about 256 days away. Fall's first freeze usually shows up around 10/11, roughly 152 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cheboygan in Zone 5a (-20 to -15°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
Cheboygan's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Cheboygan's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Cheboygan against the rest of the dataset
At roughly 152 frost-free days, Cheboygan places 34,753 of 40,283 ZIP codes in this dataset. Within MI, it ranks 800 of 1,153.
Learn more
Two guides worth reading on 49721: zone vs. frost date, on why Zone 5a and Cheboygan's frost date answer different questions, and the frost range, on how to read the range around Cheboygan's dates instead of trusting one.