Frost dates in New Vienna, IA
The average last spring frost in New Vienna is around April 20 and the first fall frost is around October 13. That gives New Vienna an average growing season of about 176 days.
Last spring frost
| Early (10% chance after) | April 9 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 5 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 13 |
| Late (90% chance before) | November 1 |