Frost dates in Fennimore, WI
The average last spring frost in Fennimore is around May 8 and the first fall frost is around October 7. That gives Fennimore an average growing season of about 152 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | May 8 |
| Late (90%) | May 22 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 7 |
| Late (90% chance before) | October 18 |