Frost dates in Chester, MT
The average last spring frost in Chester is around May 24 and the first fall frost is around September 13. That gives Chester an average growing season of about 112 days.
Last spring frost
| Early (10% chance after) | May 11 |
|---|---|
| Average (50%) | May 24 |
| Late (90%) | June 22 |
First fall frost
| Early (10%) | August 24 |
|---|---|
| Average (50%) | September 13 |
| Late (90% chance before) | October 1 |