Frost dates in Green River, WY
The average last spring frost in Green River is around June 1 and the first fall frost is around September 13. That gives Green River an average growing season of about 104 days.
Last spring frost
| Early (10% chance after) | May 9 |
|---|---|
| Average (50%) | June 1 |
| Late (90%) | June 22 |
First fall frost
| Early (10%) | August 27 |
|---|---|
| Average (50%) | September 13 |
| Late (90% chance before) | October 7 |