Frost dates in Brown County, South Dakota
The average last spring frost in Brown County falls May 6 to May 11 and the average first fall frost Sep 26 to Oct 4, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 4b. Places: Aberdeen, Bath, Columbia, Ferney, Frederick, Groton. 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 |
|---|---|---|---|---|
| 57401 | Aberdeen | May 9 | Sep 26 | 4a |
| 57426 | May 7 | Sep 29 | 4a | |
| 57427 | Bath | May 9 | Sep 26 | 4a |
| 57432 | Newport Colony | May 7 | Sep 29 | 4a |
| 57433 | Columbia | May 7 | Sep 29 | 4a |
| 57439 | Ferney | May 6 | Oct 4 | 4a |
| 57441 | Frederick | May 7 | Sep 29 | 4b |
| 57445 | Groton | May 6 | Oct 4 | 4a |
| 57446 | Hecla | May 7 | Sep 29 | 4a |
| 57449 | May 7 | Sep 29 | 4a | |
| 57460 | Mansfield | May 11 | Sep 27 | 4b |
| 57474 | Stratford | May 6 | Sep 29 | 4a |
| 57479 | Warner | May 9 | Sep 26 | 4a |
| 57481 | Long Lake Colony | May 9 | Sep 28 | 4b |
Nearby counties
Day County Marshall County Spink County Edmunds County McPherson County Faulk County
All South Dakota counties · Download South Dakota frost dates (CSV)
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