Frost dates in Thurman, IA
The average last spring frost in Thurman is around April 17 and the first fall frost is around October 17. That gives Thurman an average growing season of about 183 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 17 |
| Late (90%) | May 1 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 29 |