Frost dates in Cerro Gordo County, Iowa
The average last spring frost in Cerro Gordo County falls Apr 29 to May 3 and the average first fall frost Oct 1 to Oct 9, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Clear Lake, Dougherty, Mason City, Plymouth, Rock Falls, Rockwell. 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 |
|---|---|---|---|---|
| 50401 | Mason City | Apr 29 | Oct 7 | 5a |
| 50428 | Clear Lake | May 3 | Oct 1 | 5a |
| 50433 | Dougherty | Apr 29 | Oct 9 | 5a |
| 50464 | Plymouth | Apr 29 | Oct 7 | 5a |
| 50467 | Rock Falls | Apr 29 | Oct 7 | 5a |
| 50469 | Rockwell | Apr 29 | Oct 7 | 5a |
| 50477 | Swaledale | May 3 | Oct 1 | 5a |
| 50479 | Thornton | May 3 | Oct 1 | 5a |
| 50482 | Ventura | May 3 | Oct 1 | 5a |
Nearby counties
Worth County Floyd County Franklin County Hancock County Mitchell County Winnebago County
All Iowa counties · Download Iowa frost dates (CSV)
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