Frost dates in St. Stephen, MN
The average last spring frost in St. Stephen is around May 12 and the first fall frost is around October 5. That gives St. Stephen an average growing season of about 146 days.
Last spring frost
| Early (10% chance after) | April 25 |
|---|---|
| Average (50%) | May 12 |
| Late (90%) | May 19 |
First fall frost
| Early (10%) | September 13 |
|---|---|
| Average (50%) | October 5 |
| Late (90% chance before) | October 12 |