Frost dates in Rio Dell, CA
The average last spring frost in Rio Dell is around February 18 and the first fall frost is around December 7. That gives Rio Dell 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 |