Cicada Map For 2024. Not to be redistributed or published without prior written permission. Scientists have found that periodical cicadas emerge when soil temperature at a depth of 8 inches exceeds 64˚f (18˚c).
Trillions of cicadas will emerge in 2024. The last time this occurred was 1803, the birth year of ralph waldo emerson, thomas jefferson’s third year as president of the united states, and the year of the louisiana purchase.