Frost dates in San Ramon, CA
The average last spring frost in San Ramon is around March 26 and the first fall frost is around November 30. That gives San Ramon an average growing season of about 249 days.
Last spring frost
| Early (10% chance after) | February 11 |
|---|---|
| Average (50%) | March 26 |
| Late (90%) | April 24 |
First fall frost
| Early (10%) | November 12 |
|---|---|
| Average (50%) | November 30 |
| Late (90% chance before) | December 23 |