Frost dates in Johnson, MN
The average last spring frost in Johnson is around May 8 and the first fall frost is around October 1. That gives Johnson an average growing season of about 146 days.
Last spring frost
| Early (10% chance after) | April 22 |
|---|---|
| Average (50%) | May 8 |
| Late (90%) | May 24 |
First fall frost
| Early (10%) | September 19 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 16 |