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

See the St. Thomas planting calendar →