Frost dates in Petaluma, CA
The average last spring frost in Petaluma is around March 11 and the first fall frost is around November 20. That gives Petaluma an average growing season of about 254 days.
Last spring frost
| Early (10% chance after) | January 31 |
|---|---|
| Average (50%) | March 11 |
| Late (90%) | April 22 |
First fall frost
| Early (10%) | November 1 |
|---|---|
| Average (50%) | November 20 |
| Late (90% chance before) | December 18 |