Frost dates in Harvey, IA
The average last spring frost in Harvey is around April 29 and the first fall frost is around October 6. That gives Harvey an average growing season of about 160 days.
Last spring frost
| Early (10% chance after) | April 16 |
|---|---|
| Average (50%) | April 29 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | September 21 |
|---|---|
| Average (50%) | October 6 |
| Late (90% chance before) | October 23 |