Frost dates in Cass Lake, MN
The average last spring frost in Cass Lake is around May 24 and the first fall frost is around September 19. That gives Cass Lake an average growing season of about 118 days.
Last spring frost
| Early (10% chance after) | May 9 |
|---|---|
| Average (50%) | May 24 |
| Late (90%) | June 9 |
First fall frost
| Early (10%) | August 31 |
|---|---|
| Average (50%) | September 19 |
| Late (90% chance before) | October 6 |