Frost dates in Howell, MI
The average last spring frost in Howell is around May 10 and the first fall frost is around October 4. That gives Howell an average growing season of about 147 days.
Last spring frost
| Early (10% chance after) | April 24 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 19 |
|---|---|
| Average (50%) | October 4 |
| Late (90% chance before) | October 21 |