Frost dates in Roy, WA
The average last spring frost in Roy is around April 22 and the first fall frost is around October 21. That gives Roy an average growing season of about 182 days.
Last spring frost
| Early (10% chance after) | March 27 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 15 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 21 |
| Late (90% chance before) | November 11 |