Frost dates in Lengby, MN
The average last spring frost in Lengby is around May 17 and the first fall frost is around September 20. That gives Lengby an average growing season of about 126 days.
Last spring frost
| Early (10% chance after) | May 6 |
|---|---|
| Average (50%) | May 17 |
| Late (90%) | June 3 |
First fall frost
| Early (10%) | September 4 |
|---|---|
| Average (50%) | September 20 |
| Late (90% chance before) | October 5 |