Munising, MI 49862 Frost Dates
49862, near Munising, MI: the frost window
Typically, the last spring freeze lands around 05/23, roughly 268 days out. Fall's first freeze usually shows up around 10/10, roughly 138 days after the last spring frost.
Munising 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
Munising'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
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/08 and only about 1 year in 10 sees frost after that.
Munising against the rest of the dataset
About 138 days separate Munising's last and first frost, putting it 37,403 of 40,283 ZIP codes nationally. Within MI, it ranks 924 of 1,153.
Learn more
Two guides worth reading on 49862: the frost range, on how to read the range around Munising's dates instead of trusting one, and local microclimates, on what one yard in Munising can differ from the 49862 normal.