Frost dates in Effie, MN
The average last spring frost in Effie is around May 15 and the first fall frost is around October 1. That gives Effie an average growing season of about 139 days.
Last spring frost
| Early (10% chance after) | May 4 |
|---|---|
| Average (50%) | May 15 |
| Late (90%) | May 26 |
First fall frost
| Early (10%) | September 20 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 10 |