Frost dates in Porterville, CA
The average last spring frost in Porterville is around March 1 and the first fall frost is around November 28. That gives Porterville an average growing season of about 272 days.
Last spring frost
| Early (10% chance after) | January 22 |
|---|---|
| Average (50%) | March 1 |
| Late (90%) | April 9 |
First fall frost
| Early (10%) | November 12 |
|---|---|
| Average (50%) | November 28 |
| Late (90% chance before) | December 16 |