Frost dates in Alberton, MT
The average last spring frost in Alberton is around May 23 and the first fall frost is around September 20. That gives Alberton an average growing season of about 120 days.
Last spring frost
| Early (10% chance after) | May 1 |
|---|---|
| Average (50%) | May 23 |
| Late (90%) | June 14 |
First fall frost
| Early (10%) | September 3 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 9 |