Frost dates in Glenwood, IA
The average last spring frost in Glenwood is around April 26 and the first fall frost is around October 7. That gives Glenwood an average growing season of about 164 days.
Last spring frost
| Early (10% chance after) | April 11 |
|---|---|
| Average (50%) | April 26 |
| Late (90%) | May 14 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 7 |
| Late (90% chance before) | October 26 |