Frost dates in Rothbury, MI
The average last spring frost in Rothbury is around May 20 and the first fall frost is around October 3. That gives Rothbury an average growing season of about 136 days.
Last spring frost
| Early (10% chance after) | May 3 |
|---|---|
| Average (50%) | May 20 |
| Late (90%) | June 5 |
First fall frost
| Early (10%) | September 13 |
|---|---|
| Average (50%) | October 3 |
| Late (90% chance before) | October 23 |