Frost dates in Armstrong, OK
The average last spring frost in Armstrong is around March 28 and the first fall frost is around November 5. That gives Armstrong an average growing season of about 222 days.
Last spring frost
| Early (10% chance after) | March 9 |
|---|---|
| Average (50%) | March 28 |
| Late (90%) | April 14 |
First fall frost
| Early (10%) | October 22 |
|---|---|
| Average (50%) | November 5 |
| Late (90% chance before) | November 24 |