Frost dates in St. Mary, MO

The average last spring frost in St. Mary is around April 7 and the first fall frost is around November 2. That gives St. Mary an average growing season of about 209 days.

Last spring frost

Early (10% chance after)March 1
Average (50%)April 7
Late (90%)April 17

First fall frost

Early (10%)October 29
Average (50%)November 2
Late (90% chance before)November 22

See the St. Mary planting calendar →