Frost dates in Cottonwood, SD
The average last spring frost in Cottonwood is around May 16 and the first fall frost is around September 21. That gives Cottonwood an average growing season of about 128 days.
Last spring frost
| Early (10% chance after) | May 3 |
|---|---|
| Average (50%) | May 16 |
| Late (90%) | May 30 |
First fall frost
| Early (10%) | September 11 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 6 |