Frost dates in Roscommon, MI
The average last spring frost in Roscommon is around May 20 and the first fall frost is around September 23. That gives Roscommon an average growing season of about 126 days.
Last spring frost
| Early (10% chance after) | May 5 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 4 |
First fall frost
| Early (10%) | September 4 |
|---|---|
| Average (50%) | September 23 |
| Late (90% chance before) | October 10 |