Frost dates in Seneca, OR
The average last spring frost in Seneca is around July 25 and the first fall frost is around August 6. That gives Seneca an average growing season of about 12 days.
Last spring frost
| Early (10% chance after) | June 28 |
|---|---|
| Average (50%) | July 25 |
| Late (90%) | July 31 |
First fall frost
| Early (10%) | August 1 |
|---|---|
| Average (50%) | August 6 |
| Late (90% chance before) | August 20 |