Frost dates in Harrah, WA
The average last spring frost in Harrah is around April 24 and the first fall frost is around October 16. That gives Harrah an average growing season of about 175 days.
Last spring frost
| Early (10% chance after) | April 2 |
|---|---|
| Average (50%) | April 24 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | September 28 |
|---|---|
| Average (50%) | October 16 |
| Late (90% chance before) | October 26 |