Petoskey, MI 49770 Frost Dates
49770, near Petoskey, MI: the frost window
Typically, the last spring freeze lands around 05/16, roughly 261 days out. Fall's first freeze usually shows up around 10/09, roughly 147 days after the last spring frost.
Petoskey sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Petoskey'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.
How much risk comes with planting early here
05/16 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 05/31 and only about 1 year in 10 sees frost after that.
Petoskey against the rest of the dataset
At roughly 147 frost-free days, Petoskey places 35,895 of 40,283 ZIP codes in this dataset. Within MI, it ranks 860 of 1,153.
Learn more
Two guides worth reading on 49770: the frost range, on how to read the range around Petoskey's dates instead of trusting one, and local microclimates, on what one yard in Petoskey can differ from the 49770 normal.