Frost dates in Dillon, MT
The average last spring frost in Dillon is around June 6 and the first fall frost is around September 9. That gives Dillon an average growing season of about 95 days.
Last spring frost
| Early (10% chance after) | May 14 |
|---|---|
| Average (50%) | June 6 |
| Late (90%) | June 30 |
First fall frost
| Early (10%) | August 20 |
|---|---|
| Average (50%) | September 9 |
| Late (90% chance before) | September 23 |