Frost dates in Iosco County, Michigan
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The average last spring frost in Iosco County falls May 8 to May 23 and the average first fall frost Sep 26 to Oct 5, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Au Sable, East Tawas, Sand Lake, Tawas City, Whittemore. 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 |
|---|---|---|---|---|
| 48730 | East Tawas | May 8 | Oct 5 | 5b |
| 48739 | May 16 | Oct 5 | 5a | |
| 48743 | May 16 | Oct 5 | 5a | |
| 48748 | Sand Lake | May 16 | Oct 5 | 5b |
| 48750 | Au Sable | May 8 | Oct 5 | 5b |
| 48763 | Tawas City | May 8 | Oct 5 | 5b |
| 48770 | Whittemore | May 23 | Sep 26 | 5a |
Nearby counties
Ogemaw County Arenac County Alcona County Oscoda County Gladwin County Alpena County
All Michigan counties · Download Michigan frost dates (CSV)
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