When Do Cicadas Come Out 2024 Illinois. Trillions of periodical cicadas are already. About six to 10 weeks after they are laid, the eggs will begin to hatch.

In spring 2024, a double brood of periodical cicadas will emerge from the ground, molt, and take to the trees to serenade areas in 17 states across the southeast and midwest. Cicadas have started popping out of the soil in the chicago area and across illinois.