Frost dates in Rainier, WA
The average last spring frost in Rainier is around May 6 and the first fall frost is around October 11. That gives Rainier an average growing season of about 158 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 6 |
| Late (90%) | May 23 |
First fall frost
| Early (10%) | September 20 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 29 |