Frost dates in Superior, AZ
The average last spring frost in Superior is around February 21 and the first fall frost is around December 10. That gives Superior an average growing season of about 293 days.
Last spring frost
| Early (10% chance after) | January 20 |
|---|---|
| Average (50%) | February 21 |
| Late (90%) | April 5 |
First fall frost
| Early (10%) | November 19 |
|---|---|
| Average (50%) | December 10 |
| Late (90% chance before) | December 26 |