Frost dates in Butternut, WI
The average last spring frost in Butternut is around May 22 and the first fall frost is around September 29. That gives Butternut an average growing season of about 130 days.
Last spring frost
| Early (10% chance after) | April 29 |
|---|---|
| Average (50%) | May 22 |
| Late (90%) | June 6 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 29 |
| Late (90% chance before) | October 21 |