Frost dates in Glenham, SD
The average last spring frost in Glenham is around May 12 and the first fall frost is around October 5. That gives Glenham an average growing season of about 146 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 12 |
| Late (90%) | May 20 |
First fall frost
| Early (10%) | September 22 |
|---|---|
| Average (50%) | October 5 |
| Late (90% chance before) | October 14 |