Frost dates in Sioux Center, IA
The average last spring frost in Sioux Center is around May 4 and the first fall frost is around October 1. That gives Sioux Center an average growing season of about 150 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 4 |
| Late (90%) | May 17 |
First fall frost
| Early (10%) | September 18 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 17 |