Frost dates in Island Park, ID
The average last spring frost in Island Park is around June 15 and the first fall frost is around September 18. That gives Island Park an average growing season of about 95 days.
Last spring frost
| Early (10% chance after) | May 16 |
|---|---|
| Average (50%) | June 15 |
| Late (90%) | June 22 |
First fall frost
| Early (10%) | September 4 |
|---|---|
| Average (50%) | September 18 |
| Late (90% chance before) | October 5 |