MONROE - As temperatures rise in Wisconsin, so do the number of mosquitoes breeding throughout the state. Summer is peak mosquito breeding season, with the insects taking advantage of the warmer weather and standing water to draw blood and lay eggs. However, despite a typically wet spring, Susan Paskewitz, professor at the University of Wisconsin-Madison's Department of Entomology, said mosquito populations have failed to climb as high as they usually do by the end of June.