Frost dates in Tieton, WA
The average last spring frost in Tieton is around April 20 and the first fall frost is around October 24. That gives Tieton an average growing season of about 187 days.
Last spring frost
| Early (10% chance after) | April 14 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 7 |
First fall frost
| Early (10%) | October 13 |
|---|---|
| Average (50%) | October 24 |
| Late (90% chance before) | October 27 |