Frost dates in Marmarth, ND
The average last spring frost in Marmarth is around May 20 and the first fall frost is around September 12. That gives Marmarth an average growing season of about 115 days.
Last spring frost
| Early (10% chance after) | May 11 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 11 |
First fall frost
| Early (10%) | August 24 |
|---|---|
| Average (50%) | September 12 |
| Late (90% chance before) | October 4 |