Frost dates in Kelso, WA
The average last spring frost in Kelso is around April 20 and the first fall frost is around November 2. That gives Kelso an average growing season of about 196 days.
Last spring frost
| Early (10% chance after) | March 19 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 15 |
First fall frost
| Early (10%) | October 10 |
|---|---|
| Average (50%) | November 2 |
| Late (90% chance before) | November 25 |