Frost dates in Shelley, ID
The average last spring frost in Shelley is around May 25 and the first fall frost is around September 19. That gives Shelley an average growing season of about 117 days.
Last spring frost
| Early (10% chance after) | May 2 |
|---|---|
| Average (50%) | May 25 |
| Late (90%) | June 16 |
First fall frost
| Early (10%) | September 4 |
|---|---|
| Average (50%) | September 19 |
| Late (90% chance before) | October 6 |