Frost dates in Shelby County, Iowa
The average last spring frost in Shelby County falls Apr 27 to May 2 and the average first fall frost Oct 3 to Oct 9, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Defiance, Earling, Elk Horn, Harlan, Irwin, Kirkman. 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 |
|---|---|---|---|---|
| 51446 | Irwin | Apr 27 | Oct 9 | 5a |
| 51447 | Kirkman | Apr 27 | Oct 9 | 5a |
| 51527 | Defiance | Apr 27 | Oct 9 | 5a |
| 51530 | Earling | Apr 27 | Oct 9 | 5b |
| 51531 | Elk Horn | May 2 | Oct 3 | 5a |
| 51537 | Harlan | Apr 27 | Oct 9 | 5b |
| 51562 | Panama | Apr 27 | Oct 9 | 5b |
| 51565 | Portsmouth | Apr 27 | Oct 9 | 5b |
| 51570 | Shelby | Apr 27 | Oct 9 | 5b |
| 51578 | Westphalia | Apr 27 | Oct 9 | 5b |
Nearby counties
Audubon County Crawford County Harrison County Pottawattamie County Cass County Carroll County
All Iowa counties · Download Iowa frost dates (CSV)
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