Frost dates in Watertown, WI
The average last spring frost in Watertown is around May 3 and the first fall frost is around October 8. That gives Watertown an average growing season of about 158 days.
Last spring frost
| Early (10% chance after) | April 17 |
|---|---|
| Average (50%) | May 3 |
| Late (90%) | May 22 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 8 |
| Late (90% chance before) | October 23 |