Frost dates in Washburn, WI
The average last spring frost in Washburn is around May 30 and the first fall frost is around September 21. That gives Washburn an average growing season of about 114 days.
Last spring frost
| Early (10% chance after) | May 16 |
|---|---|
| Average (50%) | May 30 |
| Late (90%) | June 20 |
First fall frost
| Early (10%) | September 3 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 3 |