Frost dates in Hermosa, SD
The average last spring frost in Hermosa is around May 14 and the first fall frost is around September 23. That gives Hermosa an average growing season of about 132 days.
Last spring frost
| Early (10% chance after) | May 8 |
|---|---|
| Average (50%) | May 14 |
| Late (90%) | June 5 |
First fall frost
| Early (10%) | September 5 |
|---|---|
| Average (50%) | September 23 |
| Late (90% chance before) | October 5 |