Frost dates in Plymouth County, Iowa
The average last spring frost in Plymouth County falls Apr 29 to May 3 and the average first fall frost Oct 3 to Oct 7, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Akron, Brunsville, Hinton, Kingsley, Le Mars, Merrill. 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 |
|---|---|---|---|---|
| 51001 | Akron | May 1 | Oct 4 | 5a |
| 51008 | Brunsville | Apr 30 | Oct 4 | 5a |
| 51024 | Hinton | Apr 30 | Oct 4 | 5a |
| 51028 | Kingsley | Apr 30 | Oct 4 | 5a |
| 51031 | Le Mars | Apr 30 | Oct 4 | 5a |
| 51038 | Merrill | Apr 30 | Oct 4 | 5a |
| 51045 | Oyens | Apr 30 | Oct 4 | 5a |
| 51050 | Remsen | Apr 30 | Oct 4 | 5a |
| 51062 | Westfield | May 3 | Oct 3 | 5a |
| 51108 | Sioux City | Apr 29 | Oct 7 | 5a |
| 51109 | Sioux City | Apr 29 | Oct 7 | 5a |
Nearby counties
Woodbury County Sioux County Cherokee County O'Brien County Ida County Lyon County
All Iowa counties · Download Iowa frost dates (CSV)
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