Frost dates in Silverton, OR
The average last spring frost in Silverton is around April 3 and the first fall frost is around November 8. That gives Silverton an average growing season of about 219 days.
Last spring frost
| Early (10% chance after) | March 5 |
|---|---|
| Average (50%) | April 3 |
| Late (90%) | April 24 |
First fall frost
| Early (10%) | October 20 |
|---|---|
| Average (50%) | November 8 |
| Late (90% chance before) | November 27 |