Frost dates in Harrison County, Iowa
The average last spring frost in Harrison County falls Apr 22 to May 1 and the average first fall frost Oct 3 to Oct 17, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Dunlap, Logan, Magnolia, Missouri Valley, Modale, Mondamin. 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 |
|---|---|---|---|---|
| 51529 | Dunlap | Apr 29 | Oct 8 | 5b |
| 51545 | River Sioux | May 1 | Oct 3 | 5a |
| 51546 | Logan | Apr 29 | Oct 8 | 5b |
| 51550 | Magnolia | Apr 29 | Oct 8 | 5b |
| 51555 | Missouri Valley | Apr 29 | Oct 8 | 5b |
| 51556 | Modale | Apr 22 | Oct 17 | 5b |
| 51557 | Mondamin | May 1 | Oct 3 | 5b |
| 51563 | Persia | Apr 29 | Oct 8 | 5b |
| 51564 | Pisgah | May 1 | Oct 3 | 5b |
| 51579 | Woodbine | Apr 29 | Oct 8 | 5b |
Nearby counties
Monona County Shelby County Pottawattamie County Crawford County Mills County Audubon County
All Iowa counties · Download Iowa frost dates (CSV)
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