Frost dates in Roslyn, WA
The average last spring frost in Roslyn is around May 6 and the first fall frost is around October 12. That gives Roslyn an average growing season of about 159 days.
Last spring frost
| Early (10% chance after) | March 31 |
|---|---|
| Average (50%) | May 6 |
| Late (90%) | June 6 |
First fall frost
| Early (10%) | September 25 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | November 5 |