Frost dates in College Place, WA
The average last spring frost in College Place is around May 9 and the first fall frost is around September 24. That gives College Place an average growing season of about 138 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 9 |
| Late (90%) | May 21 |
First fall frost
| Early (10%) | September 13 |
|---|---|
| Average (50%) | September 24 |
| Late (90% chance before) | October 15 |