Frost dates in Hennessey, OK
The average last spring frost in Hennessey is around April 9 and the first fall frost is around October 31. That gives Hennessey an average growing season of about 205 days.
Last spring frost
| Early (10% chance after) | March 23 |
|---|---|
| Average (50%) | April 9 |
| Late (90%) | April 19 |
First fall frost
| Early (10%) | October 16 |
|---|---|
| Average (50%) | October 31 |
| Late (90% chance before) | November 15 |