Frost dates in Osceola County, Iowa
The average last spring frost in Osceola County falls Apr 30 to May 5 and the average first fall frost Oct 3 to Oct 10, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Ashton, Harris, Melvin, Ocheyedan, Sibley. 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 |
|---|---|---|---|---|
| 51232 | Ashton | May 5 | Oct 3 | 5a |
| 51249 | Sibley | May 5 | Oct 3 | 4b |
| 51345 | Harris | Apr 30 | Oct 10 | 5a |
| 51350 | Melvin | May 1 | Oct 7 | 5a |
| 51354 | Ocheyedan | May 5 | Oct 3 | 5a |
Nearby counties
O'Brien County Dickinson County Lyon County Clay County Sioux County Cherokee County
All Iowa counties · Download Iowa frost dates (CSV)
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