Otsego, MI 49078 Frost Dates
49078, near Otsego, MI: the frost window
The last spring frost here typically falls around 05/04, about 249 days from today. Fall's first freeze usually shows up around 10/15, roughly 160 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Otsego in Zone 6a (-10 to -5°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
Otsego's growing season runs out in roughly 7 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 Otsego's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Otsego against the rest of the dataset
At roughly 160 frost-free days, Otsego places 32,303 of 40,283 ZIP codes in this dataset. Within MI, it ranks 627 of 1,153.
Learn more
Two guides worth reading on 49078: the frost range, on how to read the range around Otsego's dates instead of trusting one, and local microclimates, on what one yard in Otsego can differ from the 49078 normal.