Frost dates in Coleharbor, ND
The average last spring frost in Coleharbor is around May 15 and the first fall frost is around September 24. That gives Coleharbor an average growing season of about 132 days.
Last spring frost
| Early (10% chance after) | April 28 |
|---|---|
| Average (50%) | May 15 |
| Late (90%) | May 25 |
First fall frost
| Early (10%) | September 11 |
|---|---|
| Average (50%) | September 24 |
| Late (90% chance before) | October 9 |