When will cicadas leave ofallon mo?

Answer 1

Cicadas typically emerge in O'Fallon, MO, during late spring to early summer, specifically around late May to early June, depending on the species and weather conditions. They usually stay active for several weeks, with their presence diminishing by mid to late July. After mating and laying eggs, the adult cicadas will die off, marking the end of their cycle until the next emergence in several years.