Frost dates in Alton, UT
The average last spring frost in Alton is around June 5 and the first fall frost is around September 25. That gives Alton an average growing season of about 112 days.
Last spring frost
| Early (10% chance after) | May 22 |
|---|---|
| Average (50%) | June 5 |
| Late (90%) | June 19 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 25 |
| Late (90% chance before) | October 13 |