Frost dates in Alpena County, Michigan
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The average last spring frost in Alpena County falls May 5 to May 17 and the average first fall frost Oct 1 to Oct 17, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 6a. Places: Alpena, Ossineke. 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 |
|---|---|---|---|---|
| 49707 | Alpena | May 5 | Oct 17 | 5b |
| 49744 | May 17 | Oct 1 | 5a | |
| 49753 | May 17 | Oct 1 | 5a | |
| 49766 | Ossineke | May 5 | Oct 17 | 6a |
Nearby counties
Alcona County Montmorency County Presque Isle County Oscoda County Iosco County Otsego County
All Michigan counties · Download Michigan frost dates (CSV)
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