Frost dates in White River, SD
The average last spring frost in White River is around May 11 and the first fall frost is around October 4. That gives White River an average growing season of about 146 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 11 |
| Late (90%) | May 21 |
First fall frost
| Early (10%) | September 21 |
|---|---|
| Average (50%) | October 4 |
| Late (90% chance before) | October 19 |