Frost dates in Pullman, WA
The average last spring frost in Pullman is around May 12 and the first fall frost is around September 27. That gives Pullman an average growing season of about 138 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 12 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 10 |
|---|---|
| Average (50%) | September 27 |
| Late (90% chance before) | October 23 |