Frost dates in Twisp, WA
The average last spring frost in Twisp is around May 20 and the first fall frost is around September 20. That gives Twisp an average growing season of about 123 days.
Last spring frost
| Early (10% chance after) | May 3 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 10 |
First fall frost
| Early (10%) | September 5 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 5 |