Negaunee, MI 49841 Frost Dates
Frost dates for Negaunee, MI, ZIP 49841
Around 05/13 is the usual last spring frost, about 258 days away. The first fall frost typically arrives around 10/02, about 141 frost-free days later.
Negaunee sits in USDA Zone 5a (-20 to -15°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.
What to do before the first frost
Zone 5a around Negaunee has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Negaunee compares
About 141 days separate Negaunee's last and first frost, putting it 36,903 of 40,283 ZIP codes nationally. Within MI, it ranks 907 of 1,153.
Learn more
local microclimates explains what one yard in Negaunee can differ from the 49841 normal, and zone vs. frost date explains why Zone 5a and Negaunee's frost date answer different questions.