Frost dates in Choteau, MT
The average last spring frost in Choteau is around May 25 and the first fall frost is around September 14. That gives Choteau an average growing season of about 112 days.
Last spring frost
| Early (10% chance after) | May 10 |
|---|---|
| Average (50%) | May 25 |
| Late (90%) | June 12 |
First fall frost
| Early (10%) | September 2 |
|---|---|
| Average (50%) | September 14 |
| Late (90% chance before) | September 29 |