Frost dates in American Falls, ID
The average last spring frost in American Falls is around May 10 and the first fall frost is around October 9. That gives American Falls an average growing season of about 152 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 23 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 9 |
| Late (90% chance before) | October 24 |