Frost dates in Three Forks, MT
The average last spring frost in Three Forks is around May 16 and the first fall frost is around September 19. That gives Three Forks an average growing season of about 126 days.
Last spring frost
| Early (10% chance after) | May 2 |
|---|---|
| Average (50%) | May 16 |
| Late (90%) | June 3 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 19 |
| Late (90% chance before) | October 4 |