Frost dates in Ontonagon County, Michigan
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The average last spring frost in Ontonagon County falls May 23 to May 31 and the average first fall frost Sep 19 to Oct 1, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Bruce Crossing, Ewen, Greenland, Lake Gogebic, Mass City, Ontonagon. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 49910 | Lake Gogebic | May 26 | Sep 27 | 4b |
| 49912 | Bruce Crossing | May 31 | Sep 19 | 4b |
| 49925 | Ewen | May 26 | Sep 27 | 4b |
| 49929 | Greenland | May 23 | Oct 1 | 5a |
| 49948 | Mass City | May 23 | Oct 1 | 4b |
| 49953 | Ontonagon | May 27 | Oct 1 | 5a |
| 49960 | Rockland | May 27 | Oct 1 | 4b |
| 49971 | White Pine | May 26 | Sep 27 | 4b |
Nearby counties
Gogebic County Houghton County Baraga County Iron County Keweenaw County Dickinson County
All Michigan counties · Download Michigan frost dates (CSV)
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