Frost dates in Sunnyvale, CA
The average last spring frost in Sunnyvale is around January 28 and the first fall frost is around December 12. That gives Sunnyvale an average growing season of about 319 days.
Last spring frost
| Early (10% chance after) | January 4 |
|---|---|
| Average (50%) | January 28 |
| Late (90%) | March 12 |
First fall frost
| Early (10%) | November 18 |
|---|---|
| Average (50%) | December 12 |
| Late (90% chance before) | December 22 |