Cicadas 2025 Wisconsin. Seventeen years ago, parts of wisconsin were suddenly swarming with cicadas and their loud humming song for a few brief weeks. Tons of cicadas will emerge in wisconsin soon.

There are annual cicadas, known as the “dog day cicada” in wisconsin, which normally emerge above ground in july and august. Cicadas spend most of their lives underground as immature nymphs, who surface en masse every 13 or 17 years.