Frost dates in Mercer, ND
The average last spring frost in Mercer is around May 16 and the first fall frost is around September 23. That gives Mercer an average growing season of about 130 days.
Last spring frost
| Early (10% chance after) | May 2 |
|---|---|
| Average (50%) | May 16 |
| Late (90%) | June 2 |
First fall frost
| Early (10%) | September 9 |
|---|---|
| Average (50%) | September 23 |
| Late (90% chance before) | October 7 |