Frost dates in Phoenix, AZ
The average last spring frost in Phoenix is around January 20 and the first fall frost is around December 21. That gives Phoenix an average growing season of about 336 days.
Last spring frost
| Early (10% chance after) | January 4 |
|---|---|
| Average (50%) | January 20 |
| Late (90%) | February 19 |
First fall frost
| Early (10%) | December 2 |
|---|---|
| Average (50%) | December 21 |
| Late (90% chance before) | December 29 |