Frost dates in Butler, WI
The average last spring frost in Butler is around April 30 and the first fall frost is around October 20. That gives Butler an average growing season of about 173 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | June 17 |
First fall frost
| Early (10%) | September 30 |
|---|---|
| Average (50%) | October 20 |
| Late (90% chance before) | October 26 |