Frost dates in Grain Valley, MO
The average last spring frost in Grain Valley is around April 10 and the first fall frost is around October 29. That gives Grain Valley an average growing season of about 202 days.
Last spring frost
| Early (10% chance after) | March 23 |
|---|---|
| Average (50%) | April 10 |
| Late (90%) | April 23 |
First fall frost
| Early (10%) | October 14 |
|---|---|
| Average (50%) | October 29 |
| Late (90% chance before) | November 11 |