Frost dates in Riverton, IA
The average last spring frost in Riverton is around April 17 and the first fall frost is around October 17. That gives Riverton an average growing season of about 183 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 17 |
| Late (90%) | May 1 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 29 |