Frost dates in Merrill, WI

The average last spring frost in Merrill is around May 20 and the first fall frost is around September 24. That gives Merrill an average growing season of about 127 days.

Last spring frost

Early (10% chance after)May 6
Average (50%)May 20
Late (90%)June 4

First fall frost

Early (10%)September 10
Average (50%)September 24
Late (90% chance before)October 8

See the Merrill planting calendar →