Free Soil, MI 49411 Frost Dates
Free Soil, MI: when does the frost end?
Around 05/14 is the usual last spring frost, about 259 days away. Fall's first freeze usually shows up around 10/12, roughly 151 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Free Soil 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
With roughly 6 weeks until Free Soil's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/14 isn't a guarantee
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 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.
Free Soil against the rest of the dataset
At roughly 151 frost-free days, Free Soil places 35,185 of 40,283 ZIP codes in this dataset. Within MI, it ranks 821 of 1,153.
Learn more
Before leaning on 49411's figures: the frost range explains how to read the range around Free Soil's dates instead of trusting one, while local microclimates explains what one yard in Free Soil can differ from the 49411 normal.