Frost dates in Walnut Grove, MN
The average last spring frost in Walnut Grove is around May 3 and the first fall frost is around September 30. That gives Walnut Grove an average growing season of about 150 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 3 |
| Late (90%) | May 17 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | September 30 |
| Late (90% chance before) | October 15 |