Cicadas typically stop making noise and become quiet after about 4 to 6 weeks of activity. Most annual cicadas start singing in late June or July and continue for this period, while periodical cicadas emerge in May or early June and also keep up their noisy choruses for around 4 to 6 weeks. The noise usually diminishes after mating is completed and the adults die, which marks the end of their noisy presence until the next generation emerges years later. They are most active and loud during hot, sunny days and during the warmest parts of the day. When the weather cools, the cicadas' noise will lessen and eventually stop.
In summary, cicadas stop making noise typically by late summer, after a few weeks of intense singing during their adult phase, often around August or early September depending on the species and local climate.
