Today's score
Mosquitoes in Winthrop Harbor, IL
Lake County
Moderate risk
Mosquitoes are active, especially at dawn and dusk. Use repellent and empty any standing water around the yard.
Updated July 15, 2026
- Season
- Ramping up
- Water/wetland
- 0%
- Top species
- Cattail mosquito
Right now
Latest reading- 76°
- Temperature
- 83%
- Humidity
- 0.0"
- Recent rain
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7-day outlook
Risk recalculates daily from the local forecast.
What's active right now
Floodwater and container mosquitoes are active and building toward the summer peak. Aedes vexans (the floodwater biter) surges about a week after heavy rain, and the Asian tiger mosquito is out biting during the day around homes. Early summer is when nuisance biting takes off.
Local mosquito habitat
Mosquitoes breed in standing water, so a town's risk tracks how much of that it holds. Winthrop Harbor is 0% wetland and marsh, 0% open water, and 11% developed across its 4.64 sq mi, home to about 6,594 people. That makes it the 45th-wettest of the 46 towns in Lake County. Marshes and floodplains breed the floodwater and cattail mosquitoes; developed areas breed the house mosquito in storm-drain catch basins and backyard containers.
The single biggest thing a homeowner controls is standing water: empty anything that holds it, keep gutters clear, and change bird baths weekly. A licensed mosquito service handles the breeding sites you can't reach and treats the shady resting spots where adults wait out the day.
Mosquito control in Winthrop Harbor, IL
Do I need mosquito control in Winthrop Harbor?
Mosquito activity in Winthrop Harbor is moderate today (63/100). Mosquitoes are out, especially at dawn and dusk and in shady, humid corners. A seasonal treatment plan keeps numbers down before peak weeks hit.
Professional mosquito control in Winthrop Harbor usually pairs a barrier treatment, misted onto shrubs, tall grass, and shady borders where adults rest, with larval control that targets standing water and catch basins so new broods never hatch. Treatments are typically applied every three to four weeks through the season by a licensed company.
How much does mosquito control cost in Winthrop Harbor?
Most homeowners pay about $80 to $150 per visit for professional mosquito barrier spraying, or roughly $350 to $600 for a full season of treatments, depending on lot size and how much shade and standing water the property has. Quotes are free, so it costs nothing to get a real number for your yard.
From a vetted local mosquito control company serving Winthrop Harbor. No cost, no obligation.
Are mosquitoes bad in Winthrop Harbor right now?
Floodwater and container mosquitoes are active and building toward the summer peak. In Winthrop Harbor, today's mosquito risk reads moderate (63/100). Mosquitoes are active, especially at dawn and dusk. Use repellent and empty any standing water around the yard.
Nearby towns
Mosquito pressure is local. Check the towns around you.