Frost dates in Sioux County, Iowa
The average last spring frost in Sioux County falls Apr 30 to May 5 and the average first fall frost Sep 28 to Oct 4, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Alton, Boyden, Chatsworth, Hawarden, Hospers, Hull. 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 |
|---|---|---|---|---|
| 51003 | Alton | Apr 30 | Oct 3 | 5a |
| 51011 | Chatsworth | May 1 | Oct 4 | 5a |
| 51023 | Hawarden | May 1 | Oct 4 | 5a |
| 51027 | Ireton | May 1 | Oct 4 | 5a |
| 51036 | Maurice | Apr 30 | Oct 3 | 5a |
| 51041 | Orange City | Apr 30 | Oct 3 | 5a |
| 51201 | Sheldon | May 5 | Sep 28 | 5a |
| 51234 | Boyden | May 5 | Sep 28 | 5a |
| 51238 | Hospers | May 5 | Sep 28 | 5a |
| 51239 | Hull | Apr 30 | Oct 3 | 5a |
| 51244 | Matlock | May 5 | Sep 28 | 5a |
| 51247 | Rock Valley | Apr 30 | Oct 3 | 5a |
| 51250 | Sioux Center | Apr 30 | Oct 3 | 5a |
Nearby counties
Lyon County Plymouth County O'Brien County Osceola County Cherokee County Woodbury County
All Iowa counties · Download Iowa frost dates (CSV)
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