When the temperature drops, most people assume mosquitoes disappear completely. Unfortunately, that’s not always true. Some mosquito species can survive the winter indoors, hiding in warm, humid spots like basements, bathrooms, and garages. Even in cold climates, these pests can reappear when the heat kicks on or the weather warms up for a few days.
Here’s how you can stop mosquitoes from taking refuge inside your home during the colder months.
1. Eliminate Hidden Sources of Standing Water
Mosquitoes can’t breed without water. During winter, we often forget about hidden spots where water can collect indoors, such as:
Plant saucers and flowerpots
Pet water bowls
Humidifier trays
Drains and sump pump pits
Empty and clean these regularly. Even small amounts of standing water can harbor mosquito eggs.
🪴 Pro tip: Add a layer of sand or pebbles to plant trays to prevent water accumulation.
2. Seal Entry Points
Mosquitoes can squeeze through incredibly tiny gaps. Check for and seal:
Cracks around windows and door frames
Gaps near utility lines or vents
Torn window screens
Applying weatherstripping not only keeps mosquitoes out but also improves your home’s energy efficiency during the winter.
3. Maintain Indoor Humidity Levels
Mosquitoes love moisture. Keeping your home’s humidity between 30–50% discourages their activity. Use a dehumidifier in damp spaces like basements, laundry rooms, or bathrooms.
Bonus: Lower humidity also helps prevent mold growth and makes your indoor air more comfortable in the winter.
4. Store Firewood and Plants Properly
If you bring firewood or potted plants indoors for the season, check them carefully. They can carry mosquito eggs or larvae clinging to damp surfaces.
Keep woodpiles off the floor and away from walls, and inspect plants for any signs of insects before bringing them inside.
5. Use Indoor Mosquito Repellents Safely
When mosquitoes do make their way in, try these safe indoor repellents:
Essential oils like citronella, lavender, or peppermint (diffused or in candles)
Plug-in mosquito traps
Indoor-safe insect sprays (look for EPA-approved products)
Learn more about EPA-registered mosquito repellents on the U.S. Environmental Protection Agency’s website.
6. Keep an Eye on Winter Warm Spells
Even a few warm days in late winter can bring dormant mosquitoes back to life. Stay proactive—inspect your home’s entry points and water sources regularly, especially after a temperature rise.
Conclusion
Winter doesn’t always mean mosquito-free living. By eliminating water sources, sealing your home, and maintaining proper humidity, you can prevent mosquitoes from overwintering indoors and ensure a bite-free start to spring.
For year-round protection, Contact us today!