NORTH IOWA – Cooler nights and shorter days are bringing welcome relief from one of summer’s biggest nuisances: mosquitoes.

According to entomologists, mosquito activity in Iowa typically winds down once the state experiences its first hard frost , when overnight temperatures dip below 28 degrees for several hours . That cold snap is enough to wipe out the adult mosquito population, signaling the end of their season.

In northern Iowa, the first frost often arrives in late September or early October , while central and southern parts of the state may not see it until the middle to late part of October . Until then, Iowans can expect to deal with the lingering buzz and bites, especially on warmer evenings.

Mosquitoes thrive in standing water and humid conditions, which means a wa

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