Frost dates in Union Center, WI

The average last spring frost in Union Center is around May 12 and the first fall frost is around September 30. That gives Union Center an average growing season of about 141 days.

Last spring frost

Early (10% chance after)April 26
Average (50%)May 12
Late (90%)May 29

First fall frost

Early (10%)September 19
Average (50%)September 30
Late (90% chance before)October 11

See the Union Center planting calendar →