Frost dates in Montesano, WA
The average last spring frost in Montesano is around May 6 and the first fall frost is around October 17. That gives Montesano an average growing season of about 164 days.
Last spring frost
| Early (10% chance after) | April 15 |
|---|---|
| Average (50%) | May 6 |
| Late (90%) | May 24 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | November 10 |