Frost dates in De Smet, SD
The average last spring frost in De Smet is around May 10 and the first fall frost is around September 29. That gives De Smet an average growing season of about 142 days.
Last spring frost
| Early (10% chance after) | April 18 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | September 29 |
| Late (90% chance before) | October 15 |