Frost dates in Copper City, MI
The average last spring frost in Copper City is around May 16 and the first fall frost is around October 1. That gives Copper City an average growing season of about 138 days.
Last spring frost
| Early (10% chance after) | May 2 |
|---|---|
| Average (50%) | May 16 |
| Late (90%) | June 2 |
First fall frost
| Early (10%) | September 15 |
|---|---|
| Average (50%) | October 1 |
| Late (90% chance before) | October 19 |