Frost dates in Jefferson, OK
The average last spring frost in Jefferson is around April 15 and the first fall frost is around October 23. That gives Jefferson an average growing season of about 191 days.
Last spring frost
| Early (10% chance after) | April 2 |
|---|---|
| Average (50%) | April 15 |
| Late (90%) | May 1 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 23 |
| Late (90% chance before) | November 5 |