Frost dates in Miles City, MT
The average last spring frost in Miles City is around May 10 and the first fall frost is around October 1. That gives Miles City an average growing season of about 144 days.
Last spring frost
| Early (10% chance after) | April 24 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 26 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 16 |