Frost dates in Mount Vernon, MO
The average last spring frost in Mount Vernon is around April 18 and the first fall frost is around October 13. That gives Mount Vernon an average growing season of about 178 days.
Last spring frost
| Early (10% chance after) | April 5 |
|---|---|
| Average (50%) | April 18 |
| Late (90%) | May 3 |
First fall frost
| Early (10%) | September 29 |
|---|---|
| Average (50%) | October 13 |
| Late (90% chance before) | October 29 |