Cicadas 2024 Chicago Area. What you need to know about the illinois 2024 double brood emergence. 2024 is a big year for periodical cicadas in illinois, where broods xiii and xix will be emerging throughout much of the state at the same time.

Their lifespan, how long they stay out and their range. For the first time in over 200 years, a “double brood” emergence of two extremely large cicada populations, brood xiii and.