Frost dates in Lyon County, Iowa
The average last spring frost in Lyon County falls May 1 to May 5 and the average first fall frost Oct 2 to Oct 4, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Alvord, Doon, George, Inwood, Larchwood, Lester. 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 |
|---|---|---|---|---|
| 51230 | Alvord | May 1 | Oct 4 | 5a |
| 51235 | Doon | May 1 | Oct 4 | 5a |
| 51237 | George | May 1 | Oct 4 | 5a |
| 51240 | Inwood | May 2 | Oct 2 | 5a |
| 51241 | Larchwood | May 2 | Oct 2 | 5a |
| 51242 | Lester | May 1 | Oct 4 | 5a |
| 51243 | Little Rock | May 5 | Oct 3 | 5a |
| 51246 | Rock Rapids | May 1 | Oct 4 | 5a |
Nearby counties
Sioux County Osceola County O'Brien County Plymouth County Cherokee County Dickinson County
All Iowa counties · Download Iowa frost dates (CSV)
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