Frost dates in Iron Junction, MN
The average last spring frost in Iron Junction is around May 17 and the first fall frost is around October 1. That gives Iron Junction an average growing season of about 137 days.
Last spring frost
| Early (10% chance after) | April 30 |
|---|---|
| Average (50%) | May 17 |
| Late (90%) | May 29 |
First fall frost
| Early (10%) | September 20 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 17 |