Frost dates in Frannie, WY
The average last spring frost in Frannie is around May 18 and the first fall frost is around September 21. That gives Frannie an average growing season of about 126 days.
Last spring frost
| Early (10% chance after) | May 2 |
|---|---|
| Average (50%) | May 18 |
| Late (90%) | June 5 |
First fall frost
| Early (10%) | September 6 |
|---|---|
| Average (50%) | September 21 |
| Late (90% chance before) | October 4 |