Frost dates in Vernal, UT
The average last spring frost in Vernal is around May 21 and the first fall frost is around September 24. That gives Vernal an average growing season of about 126 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 21 |
| Late (90%) | June 18 |
First fall frost
| Early (10%) | September 10 |
|---|---|
| Average (50%) | September 24 |
| Late (90% chance before) | October 15 |