Frost dates in Howard, SD
The average last spring frost in Howard is around May 12 and the first fall frost is around September 27. That gives Howard an average growing season of about 138 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 12 |
| Late (90%) | May 28 |
First fall frost
| Early (10%) | September 11 |
|---|---|
| Average (50%) | September 27 |
| Late (90% chance before) | October 13 |