You can get ticks in the winter, especially during mild spells when temperatures rise above freezing.
Cold weather usually makes ticks inactive rather than killing them. Many ticks shelter beneath leaf litter or soil until conditions improve.
Keep taking tick precautions whenever you spend time outdoors, even during winter.
Adult blacklegged ticks, also called deer ticks, can seek hosts during warm fall and winter days.
Your risk depends on temperature, snow cover, habitat, and how much exposure you have to vegetation, wildlife, and pets.
Research on winter tick activity in the Northeast shows adult ticks become active during midwinter warm spells.
When Winter Tick Encounters Are Most Likely
Winter encounters are most likely during above-freezing weather.
Leaf litter, low vegetation, and exposed grass can provide access to passing hosts.
A short walk, yard task, or outing with your dog can create exposure when local conditions are favorable.
Above-Freezing Days and Thawed Ground
Blacklegged ticks become less active during freezing weather.
They may resume movement when temperatures rise.
Adult ticks search for hosts before spring, making them especially relevant in late fall and winter.
Thawed ground and sunny areas can create small pockets of activity.
You may encounter a tick while hiking or walking through a wooded trail even when snow remains nearby.
Winter cold does not reliably eliminate overwintering ticks. Ticks can shelter beneath protective layers.
Leaf Litter, Vegetation, and Snow Cover
Ticks often move through leaf litter, soil pores, and low vegetation.
On a mild day, adult ticks may climb nearby vegetation and attach to clothing, skin, or animal fur.
Continuous snow cover may limit upward movement and host-seeking activity.
Patchy snow, melting edges, tall grass, and exposed leaf litter can leave parts of suitable tick habitat accessible.
Regional Differences in the Northeast and Beyond
In the northeast, winter activity often involves adult blacklegged ticks and brief warm spells.
Areas with milder winters may offer more opportunities for activity than places with prolonged, deep freezing.
Conditions vary across the United States.
Your local tick species, elevation, snow depth, temperature patterns, and wildlife abundance all affect risk.
Seasonal prevention should match your region rather than the calendar alone.
Which Ticks Matter During Cold Weather
Several tick species can affect people, pets, or wildlife in winter.
Adult blacklegged ticks can transmit Lyme disease, babesiosis, and anaplasmosis.
Winter ticks mainly affect large mammals, and brown dog ticks may persist indoors.
Adult Blacklegged Ticks and Human Disease Risk
Adult blacklegged ticks are small, roughly sesame-seed-sized, and can remain active during warm winter periods.
They may attach to you or your dog after contact with leaf litter, brush, or dormant vegetation.
A tick bite does not automatically mean disease transmission. Prompt removal matters.
Blacklegged ticks can carry pathogens associated with Lyme disease, babesiosis, and anaplasmosis.
Watch for symptoms after a bite and contact a healthcare professional if you develop a spreading rash, fever, headache, fatigue, or other concerns.
Winter Tick and Its Impact on Moose
The winter tick, Dermacentor albipictus, primarily affects wildlife such as moose and deer.
It has a different seasonal pattern from blacklegged ticks, with larvae often attaching to hosts in fall and developing through winter.
A heavy tick infestation can cause irritation, blood loss, hair loss, and poor condition in moose.
This species is not the main winter tick concern for human Lyme disease risk.
Its impact on wildlife can be significant.
Brown Dog Ticks in Homes and Kennels
Brown dog ticks can live around dogs, kennels, bedding, cracks, and other sheltered locations.
Indoor warmth may allow them to remain active when outdoor temperatures are too cold.
Inspect your dog after outdoor activity.
Wash bedding as directed and address repeated findings promptly.
If you notice numerous ticks or a continuing infestation, ask your veterinarian or a licensed pest professional for advice on treatment and environmental control.
Reducing Winter Exposure for People and Dogs
You can lower winter exposure by choosing paths carefully and using appropriate protection.
Check your body and pets after time outdoors.
These habits matter most during thaws, in brushy areas, and near tall grass or leaf litter.
Precautions for Hiking and Yard Tasks
Stay near the center of cleared trails when possible.
Avoid brushing against tall grass, shrubs, and low vegetation.
Wear light-colored clothing so you can spot crawling ticks more easily.
For yard tasks, clear leaf litter from frequently used areas.
Do not assume snow eliminates exposure, particularly where melting patches reveal vegetation or ground cover.
Tick Repellent and Protective Clothing
Use a tick repellent according to its label.
Products containing DEET or picaridin can help protect exposed skin.
Permethrin-treated clothing and gear can provide additional protection when used correctly.
Wear long sleeves, long pants, and closed shoes.
Tuck pants into socks for higher-risk activities.
Follow product instructions carefully around dogs, cats, children, and treated fabrics.
Tick Checks and Safe Follow-Up
Check for ticks after hiking, yard work, or playing outdoors. Examine your ankles, behind your knees, waist, groin, armpits, scalp, and other warm, hidden areas.
Look over your dog’s ears, collar area, toes, belly, and between the legs.
If you find an attached tick, use fine-tipped tweezers to grasp it close to the skin and pull upward steadily.
Clean the bite area and your hands. Record the date and watch for symptoms.
Seek medical or veterinary guidance if illness develops or your pet seems unwell.
