Frost dates in Sister Bay, WI
The average last spring frost in Sister Bay is around May 13 and the first fall frost is around October 19. That gives Sister Bay an average growing season of about 159 days.
Last spring frost
| Early (10% chance after) | April 29 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | May 25 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | November 3 |