Frost dates in Culbertson, MT
The average last spring frost in Culbertson is around May 20 and the first fall frost is around September 14. That gives Culbertson an average growing season of about 117 days.
Last spring frost
| Early (10% chance after) | May 9 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 8 |
First fall frost
| Early (10%) | August 28 |
|---|---|
| Average (50%) | September 14 |
| Late (90% chance before) | September 25 |