Frost dates in Clark, SD
The average last spring frost in Clark is around May 6 and the first fall frost is around October 9. That gives Clark an average growing season of about 156 days.
Last spring frost
| Early (10% chance after) | April 24 |
|---|---|
| Average (50%) | May 6 |
| Late (90%) | May 18 |
First fall frost
| Early (10%) | September 26 |
|---|---|
| Average (50%) | October 9 |
| Late (90% chance before) | October 19 |