Roscommon, MI 48653 Frost Dates
48653, near Roscommon, MI: the frost window
Around 05/19 is the usual last spring frost, about 264 days away. Fall's first freeze usually shows up around 09/23, roughly 125 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Roscommon 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
Roscommon's growing season runs out in roughly 4 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 Roscommon's last frost
05/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Roscommon against the rest of the dataset
At roughly 125 frost-free days, Roscommon places 38,775 of 40,283 ZIP codes in this dataset. Within MI, it ranks 1,077 of 1,153.
Learn more
Two guides worth reading on 48653: zone vs. frost date, on why Zone 5a and Roscommon's frost date answer different questions, and the frost range, on how to read the range around Roscommon's dates instead of trusting one.