Frost dates in Sister Bay, WI

The average last spring frost in Sister Bay is around May 13 and the first fall frost is around October 19. That gives Sister Bay an average growing season of about 159 days.

Last spring frost

Early (10% chance after)April 29
Average (50%)May 13
Late (90%)May 25

First fall frost

Early (10%)October 4
Average (50%)October 19
Late (90% chance before)November 3

See the Sister Bay planting calendar →