Which season sees the highest mosquito activity in Illinois?

Summer is the season that sees the highest mosquito activity in Illinois due to several environmental factors that enhance mosquito breeding and survival. Warmer temperatures during the summer foster ideal conditions for mosquito reproduction, as many species thrive in temperatures ranging from 70°F to 90°F.

Additionally, summer typically brings increased rainfall and humidity, which create standing water that serves as prime breeding grounds for mosquitoes. Bodies of water such as ponds, puddles, and even containers left outside accumulate rainwater and can quickly become habitats for mosquito larvae.

Moreover, summer often includes more opportunities for humans to be outdoors, increasing interactions with mosquitoes that may carry diseases such as West Nile virus. This heightened activity during the summer allows for a more extended breeding season, leading to higher populations by the end of the season.

Other seasons, like spring and fall, may see mosquito activity as well but generally do not match the intensity and volume of summer populations. Winter, conversely, sees a significant decline in mosquito presence due to cold temperatures that are not conducive to their survival.