Berrien Springs, MI 49103 Frost Dates
49103, near Berrien Springs, MI: the frost window
Typically, the last spring freeze lands around 04/22, roughly 237 days out. Fall's first freeze usually shows up around 10/30, roughly 189 days after the last spring frost.
Berrien Springs sits in USDA Zone 6a (-10 to -5°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
Berrien Springs's growing season runs out in roughly 9 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
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Berrien Springs against the rest of the dataset
At roughly 189 frost-free days, Berrien Springs places 21,615 of 40,283 ZIP codes in this dataset. Within MI, it ranks 44 of 1,153.
Learn more
Two guides worth reading on 49103: local microclimates, on what one yard in Berrien Springs can differ from the 49103 normal, and zone vs. frost date, on why Zone 6a and Berrien Springs's frost date answer different questions.