Frost dates in Washington County, Missouri
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The average last spring frost in Washington County falls Apr 11 and the average first fall frost Oct 28, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6b. Places: Caledonia, Irondale, Mineral Point, Potosi. 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 |
|---|---|---|---|---|
| 63030 | Apr 11 | Oct 28 | 6b | |
| 63071 | Apr 11 | Oct 28 | 6b | |
| 63622 | Apr 11 | Oct 28 | 6b | |
| 63626 | Apr 11 | Oct 28 | 6b | |
| 63630 | Apr 11 | Oct 28 | 6b | |
| 63631 | Caledonia | Apr 11 | Oct 28 | 6b |
| 63648 | Irondale | Apr 11 | Oct 28 | 6b |
| 63660 | Mineral Point | Apr 11 | Oct 28 | 6b |
| 63664 | Potosi | Apr 11 | Oct 28 | 6b |
| 63674 | Apr 11 | Oct 28 | 6b |
Nearby counties
St. Francois County Jefferson County Crawford County Iron County Franklin County Ste. Genevieve County
All Missouri counties · Download Missouri frost dates (CSV)
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