Ishpeming, MI 49879 Frost Dates
49879, near Ishpeming, MI: the frost window
The NOAA station nearest to 49879 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 4a (-30 to -25°F average annual minimum).
Ishpeming against the rest of the dataset
Ishpeming's growing season runs about 96 days, ranking 39,794 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,142 of 1,153.
Learn more
Two guides worth reading on 49879: zone vs. frost date, on why Zone 4a and Ishpeming's frost date answer different questions, and local microclimates, on what one yard in Ishpeming can differ from the 49879 normal.