Frost dates in West Allis, WI
The average last spring frost in West Allis is around April 22 and the first fall frost is around October 24. That gives West Allis an average growing season of about 185 days.
Last spring frost
| Early (10% chance after) | April 10 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 2 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 24 |
| Late (90% chance before) | November 5 |