Frost dates in Lead, SD
The average last spring frost in Lead is around May 22 and the first fall frost is around September 21. That gives Lead an average growing season of about 122 days.
Last spring frost
| Early (10% chance after) | May 9 |
|---|---|
| Average (50%) | May 22 |
| Late (90%) | June 12 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 7 |