Deer Ticks in Fall and Winter: Why NJ Tick Season Doesn't End When It Gets Cold
The first cold morning arrives in New Jersey. You put away the patio furniture, start raking leaves, and probably stop thinking about ticks.
That makes sense. It can also be a mistake.
While many insects become less active as temperatures drop, adult blacklegged ticks, commonly called deer ticks, enter one of their most important activity periods in fall.
In New Jersey, Rutgers reports that adult blacklegged ticks are active from October through April. Their activity peaks in fall and spring, and they can continue looking for hosts during winter whenever temperatures rise above freezing.
So that warm November afternoon when you're raking leaves, the mild December day when you're walking your dog along the woods, or the 40-degree January weekend when the kids are playing outside? Tick prevention still matters.
Let's look at why deer ticks stay active so late in the year, where you're most likely to encounter them, what that means for Lyme disease risk in New Jersey, and what you can do to make your property less tick-friendly.
Do Ticks Really Stay Active in Fall and Winter?
Yes, especially blacklegged ticks. This is one of the biggest misconceptions we hear about ticks. Cold weather does not automatically mean every tick is dead or dormant until spring.
The CDC's updated 2026 blacklegged-tick surveillance guidance says adults may search for hosts any time winter temperatures are above freezing. Rutgers reports the same pattern specifically for New Jersey.
That doesn't mean tick activity is equally high every day of winter. Snow cover, frozen ground, and very low temperatures can dramatically reduce activity. But give adult deer ticks a mild day and suitable ground conditions, and they can become active again.
That's why we prefer to think of New Jersey tick exposure as seasonal pressure that rises and falls, rather than a season that simply switches off after October.
Fall Is Actually Adult Deer Tick Season in New Jersey
Different life stages are most active at different times. Rutgers NJ Ticks 4 Science currently lists:
Larvae: active April through November, with peak abundance August through October
Nymphs: active April through November, peaking May through July
Adults: active October through April, with peak abundance in fall and spring
That's why focusing only on spring and summer misses part of the story. The tiny nymph stage causes a lot of concern in late spring and early summer because nymphs are so difficult to see. Then fall arrives, the nymphs have matured, and we're dealing with larger adult blacklegged ticks actively searching for hosts.
The New Jersey Department of Health confirms that nymphs mature into adults toward the end of summer and into fall, and that adult ticks remain capable of transmitting Borrelia burgdorferi, the bacterium that causes Lyme disease.
What Does an Adult Deer Tick Look Like?
"Deer tick" and "blacklegged tick" refer to the same species in the eastern United States: Ixodes scapularis.
Adult females are small, but usually easier to notice than nymphs. A female blacklegged tick typically has:
Dark legs
A dark shield near the head
A reddish or orange-brown abdomen
An oval body
Eight legs as an adult
Adult males tend to look darker overall. Don't depend on size alone: an unfed adult tick is small, while a female that has taken a blood meal can become dramatically larger.
And despite a common myth, ticks don't fly or jump from trees. They usually climb low vegetation, extend their front legs, and wait for a person or animal to brush against them. This behavior is called questing. Rutgers notes that adult deer ticks often use vegetation just a few inches above the ground while searching for hosts.
Why Doesn't Freezing Weather Kill Deer Ticks?
Ticks are much better adapted to cold than many homeowners realize. When conditions become unfavorable, blacklegged ticks can shelter in the layer of leaves and organic material near the soil surface. That leaf litter helps protect them from drying out and extreme temperatures.
Rutgers tick expert Dina Fonseca has explained that as long as temperatures rise above freezing, ticks can become active and continue searching for blood hosts. URI's TickEncounter program adds that adult blacklegged ticks aren't necessarily killed by freezing conditions and can resume activity when the ground thaws.
That's why one unusually warm winter afternoon deserves the same basic precautions you'd use on a cool fall hike.
Does Lyme Disease Risk End After Summer?
No. The risk changes, but it does not disappear.
In New Jersey, the blacklegged tick is the primary vector of Lyme disease. It can also transmit organisms associated with anaplasmosis, babesiosis, Borrelia miyamotoi disease, and Powassan virus disease.
The highest number of Lyme disease cases tends to be associated with warmer months, when nymph activity is high. But adult females can also transmit Lyme disease bacteria. CDC says most Lyme transmission requires an infected blacklegged tick to remain attached for more than 24 hours, which is why prompt detection and removal are so important.
New Jersey's own surveillance shows that fall isn't irrelevant. The state's 2025 vector-borne disease surveillance report recorded a smaller fall increase in tick-related emergency-department visits corresponding with adult blacklegged tick activity.
Where Are You Most Likely to Find Deer Ticks Around Your Yard?
When people hear "tick control," they sometimes picture spraying the middle of a neatly cut lawn. That's usually not where we'd focus first. Blacklegged ticks strongly favor humid, shaded environments. Around a North Jersey property, higher-risk areas can include:
Wooded borders and areas where lawn meets woods
Leaf litter, brush and groundcover
Low branches and shaded landscaping
Stone walls and wood piles
Wildlife trails
Rutgers has cited research in which most tick stages were found in woodland habitat and along wooded edges, with far fewer in open lawn. Your main lawn may appear perfectly maintained, but the shaded strip behind the shed or the leaf-covered edge beneath shrubs may tell a completely different story.
Fall Leaf Cleanup Can Put You Right in Tick Habitat
Cleaning up the yard can help reduce tick habitat. But doing the cleanup can also put you directly into it.
Raking leaves, pulling weeds, clearing brush, moving firewood, and walking along wooded property edges are exactly the places where adult blacklegged ticks may be searching for hosts.
So don't stop cleaning the yard. Just protect yourself while you do it. Wear long pants and appropriate footwear. Consider EPA-registered repellent according to its label. Check yourself afterward, especially around the waist, behind knees, around the hairline, under arms, and other hidden areas. CDC also recommends treating clothing and gear with products containing 0.5% permethrin when used according to label directions.
How to Make Your Yard Less Friendly to Deer Ticks
There's no realistic way to promise a completely tick-free outdoor property. What we can do is reduce favorable habitat and lower the chances of people and pets encountering ticks in the areas they use most.
Remove Leaf Litter
Don't let thick layers of leaves accumulate around recreational areas, borders, shrubs, and the edge of the lawn. Leaf litter provides the humid shelter blacklegged ticks need.
Clear Brush and Overgrown Edges
Trim back dense vegetation along frequently used parts of the property. More sunlight and airflow can make those areas less favorable to ticks.
Separate Lawn From Wooded Areas
CDC recommends creating a roughly 3-foot-wide barrier of wood chips or gravel between lawns and wooded areas, creating a clear separation between higher-risk and frequently used areas.
Move Recreation Areas Away From Woods
If possible, locate children's play equipment, seating areas, patios, and other high-use spaces away from brush and wooded edges.
Keep Woodpiles Neat and Dry
Rodents play an important role in the blacklegged tick life cycle. Keeping firewood neatly stacked in a dry area helps reduce sheltered rodent habitat near frequently used parts of the property. Our guide to keeping mice and rats out of your home covers rodent prevention in more detail.
Think in Terms of Zones
This is how we approach tick control at Accurate Pest Management. Not every square foot of a property presents equal risk. Wooded edges, shaded groundcover, wildlife routes, leaf litter, stone walls, and transition zones deserve more attention than the center of a sunny lawn.
What About Professional Tick Control?
Yard treatment can help suppress tick populations in targeted areas. But it should never be presented as a force field. CDC specifically warns homeowners not to rely on pesticide treatment alone to prevent tickborne disease. Habitat management, repellents, protective clothing, tick checks, and prompt tick removal still matter.
That's also how our tick-control program is structured. We first evaluate the property, looking at wooded edges, shaded vegetation, leaf litter, pet areas, play spaces, wildlife movement, groundcover, stone walls, and frequently used parts of the yard. Then we identify priority zones and determine where targeted treatment makes sense.
Because tick pressure changes with life stage, habitat, weather, and season, recurring seasonal protection may make more sense than relying on one application. Our goal isn't just to spray a lawn. It's to understand where the risk is coming from and focus control where people, pets, and tick habitat overlap.
What Should You Do if You Find a Tick Attached?
First, don't panic. But don't wait either. CDC updated its tick-bite guidance in June 2026 and recommends removing attached ticks as soon as possible.
Use clean, fine-tipped tweezers.
Grab the tick as close to the skin as you can.
Pull upward using steady, even pressure. Don't twist or jerk it.
Clean the bite area and your hands with soap and water, rubbing alcohol, or hand sanitizer.
Don't cover the tick with petroleum jelly, paint it with nail polish, or try to burn it off. Those popular home remedies aren't recommended.
If you develop fever, rash, or other concerning symptoms in the following days or weeks, contact a healthcare professional and tell them when and where the tick exposure occurred. Pest-control advice can help reduce exposure, but medical decisions after a tick bite belong with your healthcare provider.
Don't Forget Your Pets in Fall and Winter
Dogs don't stop walking outside because summer ended, and neither do deer ticks. Pets can encounter ticks along wooded edges, leaf litter, brush, trails, and residential yards. CDC notes that pets may carry ticks into a home or yard, although dogs and cats do not directly transmit Lyme disease to people.
Check pets after outdoor activity and speak with your veterinarian about the appropriate year-round tick preventive for your animal. Don't use human pesticides, repellents, or medications on a pet unless a veterinarian or product label specifically says they are safe for that animal. Our post on pet-friendly pest control has more on protecting pets safely.
Frequently Asked Questions About Deer Ticks in Fall and Winter
Are ticks active in New Jersey in October?
Yes. October marks the beginning of the main adult blacklegged-tick activity period in New Jersey. Rutgers lists adults as active from October through April.
Are deer ticks active during winter?
They can be. Adult blacklegged ticks may become active during winter whenever temperatures rise above freezing and conditions allow them to search for hosts.
Does frost kill deer ticks?
A frost does not automatically eliminate deer ticks. They can shelter in leaf litter and resume activity when winter temperatures rise.
Can you get Lyme disease from a tick in winter?
Yes. An infected adult blacklegged tick can transmit Lyme disease bacteria. Winter exposure is lower than during peak nymph season, but it is not zero.
Where are deer ticks most likely to be in my yard?
Focus on wooded borders, brush, leaf litter, groundcover, shaded vegetation, stone walls, and areas used by wildlife rather than only the middle of an open, sunny lawn.
Does tick yard treatment prevent Lyme disease?
Treatment can reduce tick numbers in targeted areas, but no yard treatment eliminates all exposure or guarantees disease prevention. CDC recommends combining yard management with personal protection and regular tick checks.
Cold Weather Doesn't Mean Tick Season Is Over
The temperature drops. Mosquitoes disappear. Summer insects slow down. And it's easy to assume ticks went with them.
Adult deer ticks didn't get that memo. Fall is actually one of their major activity periods, and a mild winter day can put them right back in host-seeking mode.
That's why our approach at Accurate Pest Management looks at tick control as a seasonal property-management problem rather than something that matters only in June. If you're finding ticks on people or pets, live beside wooded or brushy areas, or want to reduce tick pressure around frequently used parts of your property, our tick control services can help identify priority habitat and build a suppression plan. Contact us or call 973-398-8798.
In New Jersey, the first cold day doesn't end tick season. It changes which ticks you need to watch for.
