South Dakota Frost Dates
Across South Dakota, the average last spring frost ranges from Apr 26 in Sioux Falls to May 12 in Spearfish. Find your town below, or enter your ZIP code for the nearest station.
Largest cities
Average frost dates in South Dakota towns
Average (50%) dates of the last 32°F frost in spring and the first in fall, from the nearest NOAA station. Towns with 5,000+ residents.
| Town | Last frost | First frost | Season (days) |
|---|---|---|---|
| Aberdeen | May 8 | Sep 29 | 144 |
| Belle Fourche | May 10 | Sep 30 | 143 |
| Box Elder | May 12 | Oct 1 | 139 |
| Brandon | May 1 | Oct 6 | 157 |
| Brookings | May 6 | Oct 1 | 145 |
| Harrisburg | May 2 | Oct 2 | 151 |
| Huron | May 6 | Oct 2 | 146 |
| Madison | May 5 | Sep 30 | 148 |
| Mitchell | May 2 | Oct 6 | 156 |
| Pierre | May 6 | Oct 3 | 148 |
| Rapid City | May 3 | Oct 8 | 157 |
| Sioux Falls | Apr 26 | Oct 13 | 169 |
| Spearfish | May 12 | Oct 2 | 143 |
| Sturgis | May 8 | Oct 3 | 147 |
| Tea | Apr 26 | Oct 13 | 169 |
| Vermillion | May 3 | Oct 3 | 153 |
| Watertown | May 7 | Sep 30 | 145 |
| Yankton | Apr 27 | Oct 11 | 164 |