Frost dates in Mackinac County, Michigan
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The average last spring frost in Mackinac County falls May 7 to May 31 and the average first fall frost Sep 25 to Oct 23, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Mackinac Island, Naubinway, St. Ignace. 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 |
|---|---|---|---|---|
| 49719 | May 31 | Sep 25 | 5a | |
| 49745 | May 23 | Sep 30 | 5a | |
| 49757 | Mackinac Island | May 7 | Oct 23 | 5b |
| 49760 | May 23 | Sep 30 | 5a | |
| 49762 | Naubinway | May 21 | Oct 1 | 5a |
| 49775 | May 11 | Oct 11 | 5b | |
| 49781 | St. Ignace | May 23 | Sep 30 | 5b |
| 49820 | May 26 | Sep 30 | 5a | |
| 49827 | May 26 | Sep 30 | 5a | |
| 49838 | May 26 | Sep 30 | 5b |
Nearby counties
Chippewa County Emmet County Luce County Cheboygan County Charlevoix County Schoolcraft County
All Michigan counties · Download Michigan frost dates (CSV)
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