Frost dates in Cottage Grove, OR
The average last spring frost in Cottage Grove is around May 5 and the first fall frost is around October 18. That gives Cottage Grove an average growing season of about 166 days.
Last spring frost
| Early (10% chance after) | April 11 |
|---|---|
| Average (50%) | May 5 |
| Late (90%) | May 30 |
First fall frost
| Early (10%) | September 17 |
|---|---|
| Average (50%) | October 18 |
| Late (90% chance before) | November 15 |