Frost dates in Heyburn, ID
The average last spring frost in Heyburn is around May 11 and the first fall frost is around September 29. That gives Heyburn an average growing season of about 141 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 11 |
| Late (90%) | May 29 |
First fall frost
| Early (10%) | September 13 |
|---|---|
| Average (50%) | September 29 |
| Late (90% chance before) | October 19 |