Why Do Stink Bugs Come Inside During Fall In Kansas City?
Learn Why Stink Bugs Invade Homes Every Fall, And How Gunter Pest & Lawn’s Residential Plus Service Keeps Them Out.

TLDR: Stink Bugs In Kansas City

As temperatures drop in Kansas City during fall, stink bugs look for warm indoor shelters like attics and wall voids. While they don’t bite or breed indoors, they create odor and nuisance problems. Homeowners can prevent infestations by sealing entry points, reducing outdoor lighting, and scheduling professional exterior treatments such as Gunter’s Residential Plus Pest Control Program.

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Every fall, homeowners across Kansas City and Johnson County start to notice the same thing: brown, shield-shaped “stink bugs” clinging to windows, walls, and light fixtures. If you’ve spotted them this week, you’re not alone. Stink bugs are especially active in September through November, when they begin seeking warm, protected places to spend the winter, like your home.

Our Pest Control Expert Speaking About Stink Bugs

So why do stink bugs invade homes in the fall, and how can you get rid of them? Here’s what the experts at Gunter Pest & Lawn want Kansas City homeowners to know.

Why Stink Bugs Come Inside in Fall

When outdoor temperatures drop below 60°F, stink bugs start searching for shelter to survive winter.
They don’t want food, they want warmth.

These pests enter through:

  • Tiny cracks around windows, siding, and door frames
  • Gaps near attic vents, chimneys, and soffits
  • Openings around electrical outlets or ceiling lights

Once inside, they gather in attics, wall voids, and window frames, often by the hundreds.
You’ll see them on sunny walls and windows as they seek warmth during cool fall days.

The Problem With Indoor Stink Bugs

While stink bugs don’t bite, chew, or reproduce indoors, they can:

  • Emerge by the dozens on warm winter days
  • Release a strong odor when crushed or disturbed
  • Leave behind small droppings or stains on walls and curtains

Their smell comes from a defensive gland that releases a pungent odor — similar to cilantro or spoiled fruit — when they feel threatened. It’s unpleasant, and once they’re inside, they’re tough to completely remove without professional treatment.

Why Stink Bugs Invade Homes in Fall

How to Prevent Stink Bugs From Entering

Fall prevention is the best way to stop stink bugs before they become a problem.

Here’s what Gunter recommends for Kansas City homeowners:

  • Seal up entry points — Use silicone caulk around window and door frames, siding joints, utility pipes, and attic vents.
  • Repair screens — Replace or patch holes in window and vent screens.
  • Close attic gaps — Check for loose fascia boards or gaps around soffits and rooflines.
  • Turn off outdoor lights when possible — Stink bugs are drawn to light at night.
  • Schedule a professional exterior barrier treatment — The best way to stop stink bugs is to create an invisible, protective barrier around your home before they get in.

FAQ: Why Stink Bugs Invade Homes In The Fall

Q1: Why do stink bugs come inside during the fall?
Because temperatures drop below 60°F, driving them to seek warm, protected indoor spaces for winter shelter.

Q2: Do stink bugs cause damage inside the home?
Not typically — they don’t bite or chew, but they release a foul odor and can stain surfaces when crushed.

Q3: How can I keep stink bugs out of my house?
Seal cracks around doors, windows, and attic vents; repair screens; and consider a professional exterior barrier treatment.

Q4: What attracts stink bugs to my home?
They’re drawn to warmth, light, and easy entry points around doors, vents, and siding gaps.

Q5: Can pest control completely eliminate stink bugs?
Professional treatments can drastically reduce infestations and prevent overwintering, but seasonal maintenance is key to long-term control.

Gunter’s “Residential Plus” Pest Control Program

If you’re already seeing stink bugs indoors, or want to keep them out for good, our Residential Plus Pest Control Program is Kansas City’s best year-round protection plan.

Here’s what it includes:

  • Quarterly visits to keep pests away every season
  • Fall exterior barrier treatment to block overwintering pests (stink bugs, boxelder bugs, spiders, and more)
  • Safe, low-impact products for your home and family
  • Free re-treatment guarantee if pests return between visits

With Gunter, you’ll get a long-term solution, not a short-term spray.

Serving the Entire Kansas City Area

We treat homes in:

Trust Kansas City’s Family-Owned Pest Experts Since 1950

At Gunter Pest & Lawn, our family has been protecting Kansas City homes for four generations.
We know exactly how to stop fall invaders — including stink bugs — before they take over your home.

Key Takeaways: Why Stink Bugs Invade Homes In The Fall

  • Seasonal behavior: Stink bugs enter homes from September through November seeking warmth, not food.
  • Entry points: They slip in through cracks, vents, soffits, and gaps around doors and windows.
  • Indoor impact: They don’t reproduce indoors but can emit strong odors and appear in large numbers.
  • Prevention first: Seal gaps, fix screens, and turn off outdoor lights to discourage them.
  • Professional help: A fall barrier treatment is the most effective prevention method.
  • Ongoing protection: Gunter’s Residential Plus Program offers year-round defense against pests including stink bugs.

Why Stink Bugs Invade Homes In The Fall Video

For Bugs…It’s Gunter Pest & Lawn!

Call (816) 444-2847 or request a free quote at www.gunterpest.com.

Be Sure To Check Out Some Of Our Services:

Termites   —    Rodents    —    Ants     —    Bed Bugs

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