Frost dates in Lyman, WY

The average last spring frost in Lyman is around June 14 and the first fall frost is around September 13. That gives Lyman an average growing season of about 91 days.

Last spring frost

Early (10% chance after)May 31
Average (50%)June 14
Late (90%)June 28

First fall frost

Early (10%)August 25
Average (50%)September 13
Late (90% chance before)September 24

See the Lyman planting calendar →