Frost dates in Grundy County, Iowa
The average last spring frost in Grundy County falls Apr 29 to Apr 30 and the average first fall frost Oct 6 to Oct 9, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Beaman, Conrad, Dike, Grundy Center, Holland, Morrison. 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 |
|---|---|---|---|---|
| 50609 | Beaman | Apr 30 | Oct 6 | 5a |
| 50621 | Conrad | Apr 30 | Oct 6 | 5a |
| 50624 | Dike | Apr 29 | Oct 9 | 5a |
| 50638 | Grundy Center | Apr 29 | Oct 9 | 5a |
| 50642 | Holland | Apr 29 | Oct 9 | 5a |
| 50657 | Morrison | Apr 29 | Oct 9 | 5a |
| 50669 | Reinbeck | Apr 29 | Oct 9 | 5a |
| 50673 | Stout | Apr 29 | Oct 9 | 5a |
| 50680 | Wellsburg | Apr 29 | Oct 9 | 5a |
Nearby counties
Butler County Hardin County Tama County Black Hawk County Marshall County Franklin County
All Iowa counties · Download Iowa frost dates (CSV)
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