Frost dates in Shell Lake, WI
The average last spring frost in Shell Lake is around May 20 and the first fall frost is around September 23. That gives Shell Lake an average growing season of about 126 days.
Last spring frost
| Early (10% chance after) | May 6 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 10 |
First fall frost
| Early (10%) | September 5 |
|---|---|
| Average (50%) | September 23 |
| Late (90% chance before) | October 7 |