Frost dates in Jackson, WY
The average last spring frost in Jackson is around July 7 and the first fall frost is around August 15. That gives Jackson an average growing season of about 39 days.
Last spring frost
| Early (10% chance after) | June 18 |
|---|---|
| Average (50%) | July 7 |
| Late (90%) | July 29 |
First fall frost
| Early (10%) | August 4 |
|---|---|
| Average (50%) | August 15 |
| Late (90% chance before) | September 5 |