Frost dates in Leavenworth, WA
The average last spring frost in Leavenworth is around May 13 and the first fall frost is around September 29. That gives Leavenworth an average growing season of about 139 days.
Last spring frost
| Early (10% chance after) | April 24 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | May 31 |
First fall frost
| Early (10%) | September 14 |
|---|---|
| Average (50%) | September 29 |
| Late (90% chance before) | October 16 |