Frost dates in Barnum, MN
The average last spring frost in Barnum is around May 24 and the first fall frost is around September 20. That gives Barnum an average growing season of about 119 days.
Last spring frost
| Early (10% chance after) | May 4 |
|---|---|
| Average (50%) | May 24 |
| Late (90%) | June 12 |
First fall frost
| Early (10%) | August 31 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 7 |