Bug Bite Forecast: Wisconsin — Week of June 29, 2026

Expect high mosquito activity near the Chippewa and Eau Claire Rivers, especially during evening strolls or outdoor dining. Deer flies and gnats will also be prevalent in shaded park areas

With the Mississippi River and its backwaters, mosquitoes and biting midges will be extremely active. Anyone enjoying the riverfront or bluffs should prepare for significant insect encounters

Proximity to the Mississippi’s marshy edges means a very high risk of mosquito and biting fly annoyance

Expect significant mosquito activity, especially near the Fox River and bayou areas, making evening strolls or patio dining challenging

Mosquitoes will be present in parks and along the Fox River. Those enjoying outdoor dining or gardening should consider repellent

High humidity near Lake Winnebago and surrounding wetlands will fuel intense mosquito and biting fly activity, particularly for boaters and campers

Mosquitoes will be active in riverside parks and shaded areas

Mosquitoes will be extremely active near the lakeshores and in city parks during evening strolls. Expect significant biting pressure from mosquitoes and gnats, especially if enjoying outdoor patios or waterfront activities

With the Rock River and surrounding green spaces, mosquitoes and biting flies will be very aggressive. Anyone fishing, picnicking by the river, or working in gardens should prepare for frequent bites

Mosquito activity will be elevated in suburban backyards and community parks due to the warm,

Expect a significant presence of mosquitoes and gnats, particularly during dusk and near the Milwaukee River or lakefront parks. Outdoor dining and evening strolls will likely attract persistent biters

Mosquitoes will be very active near Lake Michigan and local wetlands; prepare for bites if enjoying lakeside parks or the harbor area, especially during early morning or late evening. Deer flies may also be present near taller grasses

High humidity and heat will fuel intense mosquito activity, particularly along the Root River and in waterfront parks. Anglers and picnickers should use repellent to deter persistent biters

Mosquito activity will be noticeable, especially near the Fox River and urban green spaces. Plan for repellent if spending extended time outdoors, particularly around dawn and dusk

The Rock River and surrounding parklands create ideal breeding grounds for mosquitoes; expect a high risk of bites, with gnats also a nuisance during outdoor activities in the arboretum

Mosquitoes will be active in residential areas and local parks, making evening activities like gardening or backyard barbecues prone to bites. Some gnats may also be present

Elevated mosquito activity is expected, especially near the Menomonee River Parkway and densely vegetated areas. Consider protective clothing for walks or park visits

With a mix of suburban and more open, wetland-adjacent areas, expect a high risk from mosquitoes and potentially some deer flies. Outdoor enthusiasts should take strong precautions

Mosquitoes will be present in suburban yards and golf courses, with activity peaking during the cooler parts of the day. Gnats might also be a minor annoyance

Expect active mosquitoes in local parks and along the Oak Leaf Trail. Evening walks or outdoor sports will require repellent to minimize bites

The blend of suburban development and natural areas, including wetlands, creates a high risk for mosquito and biting fly activity. Use strong repellents for any outdoor ventures

Mosquitoes will be common near the Menomonee River and throughout residential neighborhoods. Evening outdoor plans may be interrupted by persistent biters

Mosquitoes will be active, especially near wooded areas and parks. Lake Michigan breezes may offer some relief, but inland areas will see more activity

The Kettle Moraine geography and proximity to the Milwaukee River mean a high risk of mosquito, deer fly, and horsefly bites. Hikers and those near water should be well-prepared

With agricultural fields and some wetlands, mosquitoes and deer flies will be highly active. Protect yourself if working or recreating outdoors

Lake Muskego and surrounding wetlands provide prime breeding grounds; expect a very high risk of mosquito and biting fly encounters, especially near the water and wooded trails

Rural and agricultural landscapes mean a high likelihood of encounters with mosquitoes, deer flies, and horseflies. Outdoor work or recreation will require significant protection

The Rock River and numerous wetlands contribute to a high mosquito and biting fly risk. Fishing, boating, and park visits will necessitate strong bug spray

Mosquitoes will be active in residential areas with larger lots and near the Milwaukee River. Ticks might also be a concern in wooded and grassy areas

Mosquito activity will be noticeable, especially in Grant Park and residential areas with lush vegetation. Lake breezes may offer some relief on the immediate lakefront

Wetlands and open spaces contribute to a high risk of mosquito and deer fly bites. Outdoor activities, especially near natural areas, should be approached with caution and repellent

Expect active mosquitoes in suburban yards and along local streams. Evening outdoor gatherings will be

Mosquitoes will be very active near the Mukwonago River and Phantom Lake, making evening walks and backyard gatherings quite buggy. Expect persistent biting insects in shaded areas

With the hot, humid air, expect a moderate presence of mosquitoes, especially along the shores of Nagawicka and Pewaukee Lakes. Gardeners and those enjoying patios might encounter gnats

Mosquito activity will be moderate tonight, particularly in green spaces and near any drainage areas within residential zones