Moles are most active during the spring and fall seasons following a rain shower or during damp periods. Moles are also most active during morning hours, but they are active during both the night and day, according to Purdue Wildlife Conflicts.
Humans notice less mole activity during periods when the ground is frozen or hard, such as winter months or during dry periods. This causes moles to burrow more deeply into the ground. Mating typically occurs during February and March, with gestation lasting 42 days. Mole populations increase rapidly during this time, as litters consist of three to five babies and young moles leave the nest only one month after birth, according to Purdue Wildlife Conflicts.