Frost dates in Marietta, MN
The average last spring frost in Marietta is around May 6 and the first fall frost is around September 29. That gives Marietta an average growing season of about 146 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | May 6 |
| Late (90%) | May 19 |
First fall frost
| Early (10%) | September 16 |
|---|---|
| Average (50%) | September 29 |
| Late (90% chance before) | October 16 |