Frost dates in Santa Rosa, CA
The average last spring frost in Santa Rosa is around March 22 and the first fall frost is around November 16. That gives Santa Rosa an average growing season of about 239 days.
Last spring frost
| Early (10% chance after) | January 31 |
|---|---|
| Average (50%) | March 22 |
| Late (90%) | May 3 |
First fall frost
| Early (10%) | October 24 |
|---|---|
| Average (50%) | November 16 |
| Late (90% chance before) | December 10 |