Frost dates in Washburn, ND
The average last spring frost in Washburn is around May 15 and the first fall frost is around September 25. That gives Washburn an average growing season of about 133 days.
Last spring frost
| Early (10% chance after) | April 25 |
|---|---|
| Average (50%) | May 15 |
| Late (90%) | June 4 |
First fall frost
| Early (10%) | September 7 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 11 |