Frost dates in Fortuna, CA
The average last spring frost in Fortuna is around February 18 and the first fall frost is around December 7. That gives Fortuna an average growing season of about 293 days.
Last spring frost
| Early (10% chance after) | January 15 |
|---|---|
| Average (50%) | February 18 |
| Late (90%) | March 17 |
First fall frost
| Early (10%) | November 12 |
|---|---|
| Average (50%) | December 7 |
| Late (90% chance before) | December 21 |