Frost dates in Merrill, WI
The average last spring frost in Merrill is around May 20 and the first fall frost is around September 24. That gives Merrill an average growing season of about 127 days.
Last spring frost
| Early (10% chance after) | May 6 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 4 |
First fall frost
| Early (10%) | September 10 |
|---|---|
| Average (50%) | September 24 |
| Late (90% chance before) | October 8 |