Ishpeming, MI 49849 Frost Dates
When can you plant in Ishpeming, MI?
The last spring frost here typically falls around 05/26, about 271 days from today. The first fall frost typically arrives around 09/25, about 119 frost-free days later.
Ishpeming sits in USDA Zone 4b (-25 to -20°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
About 4 weeks of growing season left in Ishpeming before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Ishpeming's last frost
05/26 is the middle of 30 years of NOAA records, not a promise. Plant by 05/10 and you're betting against frost in roughly 9 years out of 10. 06/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ishpeming compares
At roughly 119 frost-free days, Ishpeming places 39,136 of 40,283 ZIP codes in this dataset. Within MI, it ranks 1,097 of 1,153.
Learn more
the frost range covers how to read the range around Ishpeming's dates instead of trusting one. local microclimates covers what one yard in Ishpeming can differ from the 49849 normal.