Frost dates in St. Thomas, MO
The average last spring frost in St. Thomas is around April 14 and the first fall frost is around October 21. That gives St. Thomas an average growing season of about 190 days.
Last spring frost
| Early (10% chance after) | March 29 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | May 1 |
First fall frost
| Early (10%) | October 2 |
|---|---|
| Average (50%) | October 21 |
| Late (90% chance before) | November 6 |