Do Ticks Survive the Winter in the Northeast?
Quick Answer: Yes. Ticks survive winter in the Northeast by sheltering under leaves, soil, and snow. They can become active on mild days above 35–40°F, so Lyme disease risk continues year-round.
Ticks survive winter beneath snow and leaf litter.
They can become active during mild winter days.
Lyme disease risk continues year-round in the Northeast.
The Winter Myth That Puts People at Risk
Many assume freezing temperatures wipe out ticks. As a Lyme disease specialist, I can tell you this isn’t the case. Ticks survive winter in the Northeast by sheltering under leaves, soil, and snow, allowing them to reemerge as soon as conditions warm.
This means Lyme disease is not just a summer problem.
Winter tick exposure contributes to delayed Lyme disease diagnosis, especially when patients and clinicians wrongly assume ticks are inactive during colder months.
Why Ticks Survive Winter in the Northeast
Blacklegged ticks (Ixodes scapularis), the main carriers of Lyme disease, are remarkably resilient. They do not die simply because the thermometer dips. Instead, they:
- Enter a dormant, low-metabolic state
- Shelter in damp, protected areas
- Benefit from insulation provided by snow and leaf litter
Moisture is often more important than temperature. In snowy winters, overwintering ticks may actually be better protected than during dry conditions.
Understanding what attracts ticks to humans can also help explain why winter exposure still occurs during milder weather.
Snow: Nature’s Insulation
Snow acts like a protective blanket. Just a few inches help stabilize ground temperatures, preventing ticks from freezing.
- Adult ticks and nymphs survive beneath snow cover
- Larvae overwinter in protected areas and emerge as nymphs in spring
- Studies in the Northeast estimate survival rates of 50–80%
When we talk about ticks in snow, we are describing a survival strategy—not a death sentence.
Are Ticks Active in Cold Weather?
Ticks do not fully hibernate. On days above 35–40°F, they may climb vegetation and search for a host.
Hunters, hikers, pet owners, and even backyard gardeners can encounter them during winter thaws.
I have diagnosed patients with Lyme disease in every season—including January and February. Winter Lyme disease risk is real.
Ticks may also become active during warm spells after snowfall, increasing the chance of unnoticed winter exposure.
Why This Matters for Year-Round Prevention
- Winter does not reset the tick population
- Snowy winters often improve survival
- High survival rates may contribute to larger nymph populations in late spring—the peak season for Lyme transmission
These dynamics may help explain why Lyme cases often surge following milder, snowier winters.
Year-round prevention strategies remain essential in endemic regions.
Learn more in: Lyme disease prevention strategies.
Protecting Yourself in Every Season
Prevention remains important—even in February.
- Perform tick checks after outdoor activity
- Clear leaf litter and brush piles from yards
- Protect pets with veterinarian-recommended tick preventives
- Seek medical evaluation promptly for symptoms of Lyme disease
After outdoor exposure, showering may help remove unattached ticks before they bite.
See: Do ticks wash off in the shower?
Did You Know?
Snow doesn’t kill ticks—it protects them. That’s why ticks survive winter in the Northeast and Lyme risk persists year-round.
Frequently Asked Questions
Do ticks die in freezing temperatures?
Can you get Lyme disease in the winter?
Where do ticks go in winter?
Clinical Takeaway
Cold weather does not eliminate Lyme disease risk. Ticks survive winter in the Northeast, and patients should remain vigilant throughout the year.
Awareness, prevention, and timely treatment remain just as important in winter as in summer.
Related Articles
High number of Lyme disease diagnoses through the winter in England
Powassan virus encephalitis contracted during winter months
Can pets harbor ticks, even in the winter?
After tick bite, how long for disease transmission?
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
