Frost dates in Willow River, MN

The average last spring frost in Willow River is around May 24 and the first fall frost is around September 20. That gives Willow River an average growing season of about 119 days.

Last spring frost

Early (10% chance after)May 4
Average (50%)May 24
Late (90%)June 12

First fall frost

Early (10%)August 31
Average (50%)September 20
Late (90% chance before)October 7

See the Willow River planting calendar →