Frost dates in Ketchikan, AK
The average last spring frost in Ketchikan is around April 20 and the first fall frost is around October 31. That gives Ketchikan an average growing season of about 194 days.
Last spring frost
| Early (10% chance after) | March 30 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | October 10 |
|---|---|
| Average (50%) | October 31 |
| Late (90% chance before) | November 24 |