Frost dates in Sedro-Woolley, WA
The average last spring frost in Sedro-Woolley is around April 14 and the first fall frost is around October 27. That gives Sedro-Woolley an average growing season of about 196 days.
Last spring frost
| Early (10% chance after) | March 17 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | October 2 |
|---|---|
| Average (50%) | October 27 |
| Late (90% chance before) | November 20 |