Frost dates in Opheim, MT
The average last spring frost in Opheim is around May 31 and the first fall frost is around September 4. That gives Opheim an average growing season of about 96 days.
Last spring frost
| Early (10% chance after) | May 18 |
|---|---|
| Average (50%) | May 31 |
| Late (90%) | June 25 |
First fall frost
| Early (10%) | August 12 |
|---|---|
| Average (50%) | September 4 |
| Late (90% chance before) | September 19 |