Frost dates in Knox, IN
The average last spring frost in Knox is around April 28 and the first fall frost is around October 17. That gives Knox an average growing season of about 172 days.
Last spring frost
| Early (10% chance after) | April 19 |
|---|---|
| Average (50%) | April 28 |
| Late (90%) | May 14 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 28 |