Kingsford, MI 54120 Frost Dates
54120, near Kingsford, MI: the frost window
Around 05/24 is the usual last spring frost, about 269 days away. Fall's first freeze usually shows up around 09/25, roughly 121 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Kingsford in Zone 4b (-25 to -20°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
Kingsford's growing season runs out in roughly 4 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
05/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 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.
Kingsford against the rest of the dataset
Kingsford's growing season runs about 121 days, ranking 39,002 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,092 of 1,153.
Learn more
Two guides worth reading on 54120: local microclimates, on what one yard in Kingsford can differ from the 54120 normal, and zone vs. frost date, on why Zone 4b and Kingsford's frost date answer different questions.