Frost dates in Port Isabel, TX
The average last spring frost in Port Isabel is around January 23 and the first fall frost is around December 18. That gives Port Isabel an average growing season of about 330 days.
Last spring frost
| Early (10% chance after) | January 6 |
|---|---|
| Average (50%) | January 23 |
| Late (90%) | March 3 |
First fall frost
| Early (10%) | December 4 |
|---|---|
| Average (50%) | December 18 |
| Late (90% chance before) | December 23 |