Negaunee, MI 49865 Frost Dates
When can you plant in Negaunee, MI?
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 09/29, about 129 frost-free days later.
The USDA Plant Hardiness Zone Map puts Negaunee in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 5 weeks of growing season left in Negaunee before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/22 isn't a guarantee
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/06 and you're betting against frost in roughly 9 years out of 10. 06/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Negaunee compares
At roughly 129 frost-free days, Negaunee places 38,456 of 40,283 ZIP codes in this dataset. Within MI, it ranks 1,037 of 1,153.
Learn more
local microclimates covers what one yard in Negaunee can differ from the 49865 normal. zone vs. frost date covers why Zone 4b and Negaunee's frost date answer different questions.