Frost dates in Williams Bay, WI
The average last spring frost in Williams Bay is around May 2 and the first fall frost is around October 11. That gives Williams Bay an average growing season of about 162 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 2 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | September 29 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 26 |