Lake Ann, MI 49650 Frost Dates
49650, near Lake Ann, MI: the frost window
The last spring frost here typically falls around 05/22, about 267 days from today. Fall's first freeze usually shows up around 10/09, roughly 140 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lake Ann 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
Lake Ann'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.
Why 05/22 isn't a guarantee
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Lake Ann against the rest of the dataset
At roughly 140 frost-free days, Lake Ann places 37,159 of 40,283 ZIP codes in this dataset. Within MI, it ranks 916 of 1,153.
Learn more
Two guides worth reading on 49650: the frost range, on how to read the range around Lake Ann's dates instead of trusting one, and local microclimates, on what one yard in Lake Ann can differ from the 49650 normal.