Frost dates in Washington, MO
The average last spring frost in Washington is around April 16 and the first fall frost is around October 22. That gives Washington an average growing season of about 189 days.
Last spring frost
| Early (10% chance after) | March 25 |
|---|---|
| Average (50%) | April 16 |
| Late (90%) | April 23 |
First fall frost
| Early (10%) | October 11 |
|---|---|
| Average (50%) | October 22 |
| Late (90% chance before) | November 6 |