Frost dates in Clayton, IA
The average last spring frost in Clayton is around April 20 and the first fall frost is around October 13. That gives Clayton an average growing season of about 176 days.
Last spring frost
| Early (10% chance after) | April 9 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 5 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 13 |
| Late (90% chance before) | November 1 |