Frost dates in Napoleon, MO
The average last spring frost in Napoleon is around April 22 and the first fall frost is around October 27. That gives Napoleon an average growing season of about 188 days.
Last spring frost
| Early (10% chance after) | April 7 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 6 |
First fall frost
| Early (10%) | October 9 |
|---|---|
| Average (50%) | October 27 |
| Late (90% chance before) | November 5 |