Frost dates in Koosharem, UT
The average last spring frost in Koosharem is around June 13 and the first fall frost is around September 11. That gives Koosharem an average growing season of about 90 days.
Last spring frost
| Early (10% chance after) | May 12 |
|---|---|
| Average (50%) | June 13 |
| Late (90%) | July 1 |
First fall frost
| Early (10%) | August 24 |
|---|---|
| Average (50%) | September 11 |
| Late (90% chance before) | September 27 |