Frost dates in Hardin, MT
The average last spring frost in Hardin is around May 13 and the first fall frost is around September 23. That gives Hardin an average growing season of about 133 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 13 |
| Late (90%) | June 5 |
First fall frost
| Early (10%) | September 10 |
|---|---|
| Average (50%) | September 23 |
| Late (90% chance before) | October 12 |