Frost dates in Riley, IN
The average last spring frost in Riley is around April 15 and the first fall frost is around October 18. That gives Riley an average growing season of about 186 days.
Last spring frost
| Early (10% chance after) | April 5 |
|---|---|
| Average (50%) | April 15 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 5 |
|---|---|
| Average (50%) | October 18 |
| Late (90% chance before) | October 31 |