Frost dates in Philomath, OR
The average last spring frost in Philomath is around April 28 and the first fall frost is around October 30. That gives Philomath an average growing season of about 185 days.
Last spring frost
| Early (10% chance after) | April 8 |
|---|---|
| Average (50%) | April 28 |
| Late (90%) | May 20 |
First fall frost
| Early (10%) | October 11 |
|---|---|
| Average (50%) | October 30 |
| Late (90% chance before) | November 21 |