Frost dates in Chehalis, WA
The average last spring frost in Chehalis is around April 26 and the first fall frost is around October 24. That gives Chehalis an average growing season of about 181 days.
Last spring frost
| Early (10% chance after) | April 3 |
|---|---|
| Average (50%) | April 26 |
| Late (90%) | May 19 |
First fall frost
| Early (10%) | September 30 |
|---|---|
| Average (50%) | October 24 |
| Late (90% chance before) | November 18 |