Frost dates in Keweenaw County, Michigan
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The average last spring frost in Keweenaw County falls May 10 to May 20 and the average first fall frost Oct 1 to Oct 21, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b to 6a. Places: Ahmeek, Copper Harbor, Eagle River. 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 |
|---|---|---|---|---|
| 49805 | May 17 | Oct 1 | 5b | |
| 49901 | Ahmeek | May 17 | Oct 1 | 5b |
| 49918 | Copper Harbor | May 20 | Oct 15 | 6a |
| 49950 | Eagle River | May 10 | Oct 21 | 5b |
Nearby counties
Houghton County Baraga County Ontonagon County Marquette County Iron County Alger County
All Michigan counties · Download Michigan frost dates (CSV)
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