Frost dates in Howell, UT
The average last spring frost in Howell is around May 21 and the first fall frost is around September 21. That gives Howell an average growing season of about 123 days.
Last spring frost
| Early (10% chance after) | May 4 |
|---|---|
| Average (50%) | May 21 |
| Late (90%) | June 20 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 9 |