Frost dates in Washington County, Iowa
The average last spring frost in Washington County falls Apr 26 to Apr 29 and the average first fall frost Oct 9 to Oct 11, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b. Places: Ainsworth, Crawfordsville, Keota, Riverside, Washington, Wellman. 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 |
|---|---|---|---|---|
| 52201 | Ainsworth | Apr 28 | Oct 11 | 5b |
| 52248 | Keota | Apr 28 | Oct 11 | 5b |
| 52327 | Riverside | Apr 29 | Oct 9 | 5b |
| 52353 | Washington | Apr 28 | Oct 11 | 5b |
| 52356 | Wellman | Apr 28 | Oct 11 | 5b |
| 52359 | West Chester | Apr 28 | Oct 11 | 5b |
| 52621 | Crawfordsville | Apr 26 | Oct 10 | 5b |
Nearby counties
Johnson County Louisa County Henry County Jefferson County Keokuk County Iowa County
All Iowa counties · Download Iowa frost dates (CSV)
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