Frost dates in Boone, IA
The average last spring frost in Boone is around May 2 and the first fall frost is around October 6. That gives Boone an average growing season of about 157 days.
Last spring frost
| Early (10% chance after) | April 14 |
|---|---|
| Average (50%) | May 2 |
| Late (90%) | May 17 |
First fall frost
| Early (10%) | September 22 |
|---|---|
| Average (50%) | October 6 |
| Late (90% chance before) | October 22 |