Frost dates in Alta, UT
The average last spring frost in Alta is around June 9 and the first fall frost is around September 19. That gives Alta an average growing season of about 102 days.
Last spring frost
| Early (10% chance after) | April 15 |
|---|---|
| Average (50%) | June 9 |
| Late (90%) | June 28 |
First fall frost
| Early (10%) | September 2 |
|---|---|
| Average (50%) | September 19 |
| Late (90% chance before) | November 9 |