Frost dates in Royal City, WA
The average last spring frost in Royal City is around April 24 and the first fall frost is around October 6. That gives Royal City an average growing season of about 165 days.
Last spring frost
| Early (10% chance after) | April 9 |
|---|---|
| Average (50%) | April 24 |
| Late (90%) | May 12 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 6 |
| Late (90% chance before) | October 22 |