Frost dates in Portland, AR
The average last spring frost in Portland is around March 16 and the first fall frost is around November 9. That gives Portland an average growing season of about 238 days.
Last spring frost
| Early (10% chance after) | February 26 |
|---|---|
| Average (50%) | March 16 |
| Late (90%) | April 3 |
First fall frost
| Early (10%) | October 22 |
|---|---|
| Average (50%) | November 9 |
| Late (90% chance before) | November 27 |