Frost dates in Waterloo, WI
The average last spring frost in Waterloo is around May 1 and the first fall frost is around October 11. That gives Waterloo an average growing season of about 163 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 1 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | October 3 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 27 |