Frost dates in Washtenaw County, Michigan
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The average last spring frost in Washtenaw County falls Apr 24 to May 8 and the average first fall frost Oct 4 to Oct 24, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6a. Places: Ann Arbor, Chelsea, Dexter, Manchester, Saline, Whitmore Lake. 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 |
|---|---|---|---|---|
| 48103 | Ann Arbor | May 8 | Oct 4 | 6a |
| 48104 | Ann Arbor | May 5 | Oct 10 | 6a |
| 48105 | Ann Arbor | May 3 | Oct 13 | 6a |
| 48108 | Ann Arbor | May 8 | Oct 4 | 6a |
| 48109 | Ann Arbor | May 3 | Oct 13 | 6a |
| 48118 | Chelsea | Apr 30 | Oct 12 | 6a |
| 48130 | Dexter | Apr 30 | Oct 12 | 6a |
| 48158 | Manchester | Apr 30 | Oct 14 | 6a |
| 48176 | Saline | May 2 | Oct 11 | 6a |
| 48189 | Whitmore Lake | May 5 | Oct 13 | 6a |
| 48190 | May 3 | Oct 10 | 6a | |
| 48191 | May 3 | Oct 10 | 6a | |
| 48197 | Ypsilanti | May 5 | Oct 10 | 6a |
| 48198 | Apr 24 | Oct 24 | 6a |
Nearby counties
Livingston County Monroe County Lenawee County Wayne County Oakland County Jackson County
All Michigan counties · Download Michigan frost dates (CSV)
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