Do raccoons hibernate?

No — that's a common myth. Raccoons enter torpor instead, a lighter, breakable dormancy that sets in during extended cold (commonly cited around 15°F) where they can sleep for days to weeks living off stored fat, per Mass Audubon and the Internet Center for Wildlife Damage Management (ICWDM). Unlike true hibernators, they rouse and forage whenever weather allows, which is exactly why a raccoon can turn up in your yard in the middle of winter.

Where do raccoons den in winter?

Naturally in tree cavities, but in New Hampshire suburbs they frequently den in attics, chimneys, garage ceiling voids, crawlspaces, and under porches — all warmer and drier than a tree, according to Mass Audubon and the Internet Center for Wildlife Damage Management (ICWDM). Raccoons may even share a den with others for extra warmth during the coldest stretches of winter, which is one reason a single attic entry point can turn into a multi-raccoon problem by midwinter.

When are baby raccoons born?

After raccoons mate in January–February and complete a roughly nine-week gestation, kits are typically born in spring, with most litters arriving around April, per Mass Audubon and the Internet Center for Wildlife Damage Management (ICWDM). Attics and chimneys make prime birthing dens, so spring is the highest-risk season for a family of raccoons raising young inside an NH home. Kits stay immobile for weeks, so sealing an entry point too early can trap them and force the mother to tear a new hole.

Is a raccoon out during the day rabid?

Not necessarily. In winter especially, raccoons will forage during daylight to take advantage of warmer temperatures, and that alone is not a red flag. Concern should rise only if the animal also shows disorientation, staggering, aggression, or paralysis — treat that combination as a possible rabies case and contact animal control immediately rather than approaching the animal. Because raccoons are a major rabies vector in the Northeast, any bite or scratch exposure should be treated as a medical emergency.

Why do I hear fighting noises in my attic in January and February?

That's most likely raccoon mating season. Homeowners commonly report thumping and vocalizations from attics in late winter as raccoons breed and females aggressively defend prime birthing den sites from other raccoons. This commotion typically peaks in February and eases once pregnant females settle in for the spring, though it can pick back up briefly around April when kits are born and the mother becomes more protective of the den.

Can raccoons be removed in winter?

Yes. Because raccoons don't truly hibernate, they leave the den every few days even during torpor, which means one-way exclusion doors and professional removal still work through winter. The best strategy is acting before the April kit season begins, since a pregnant or nursing female with dependent kits requires a different, more careful approach that avoids trapping helpless young inside the structure.

Where do raccoons go in the winter?

They den rather than migrate. Raccoons rely on torpor — periods of deep sleep on stored fat below about 15°F — instead of true hibernation, and in New Hampshire neighborhoods that usually means an attic, chimney, or crawlspace rather than a natural tree cavity, which offers far better insulation from the cold. They wake and forage during warmer stretches, so a raccoon den rarely stays completely silent for the whole winter.

When should I raccoon-proof my house?

Fall, roughly September through October, is the best window — raccoons are actively den-seeking ahead of the first frost but kits from the spring litter are already independent. Avoid sealing entry points during the April–June kit season unless a professional has confirmed the den is empty of dependent young. Trim overhanging branches, cap the chimney, and screen soffit vents at the same time to close off every likely entry point at once.

Daniel Brady · NH-Licensed Pesticide Applicator · License #782664

|Reviewed by Daniel Brady

When Are Raccoons Active? Winter, Night & NH Timing

Overwintering Wildlife

Raccoons forage from sunset to sunrise every month of the year and never truly hibernate. Below about 15°F they enter torpor — a light dormancy where they can sleep for days to weeks living off fat reserves — but they rouse and forage again on milder nights or during the warmest part of a cold day. In New Hampshire suburbs they commonly den in attics, chimneys, garage ceiling voids, and crawlspaces rather than tree cavities, and pregnant females give birth inside these structures around April.

At a glance

Activity pattern: NocturnalActive sunset to sunrise — Mass Audubon / ICWDM
Winter strategy: Torpor, not hibernationEnters torpor in extended cold (commonly cited ~15°F), sleeps days to weeks on fat, wakes to forage — Mass Audubon / ICWDM
Den sites: Attics, chimneys, garage voids, crawlspaces, porch voidsWarmer and drier than a tree cavity — Mass Audubon / ICWDM
Breeding: Mate Jan–Feb; kits born ~April~9-week (63-day) gestation; first litters often born inside structures — Mass Audubon / ICWDM

Activity pattern
Nocturnal
Active sunset to sunrise — Mass Audubon / ICWDM
Winter strategy
Torpor, not hibernation
Enters torpor in extended cold (commonly cited ~15°F), sleeps days to weeks on fat, wakes to forage — Mass Audubon / ICWDM
Den sites
Attics, chimneys, garage voids, crawlspaces, porch voids
Warmer and drier than a tree cavity — Mass Audubon / ICWDM
Breeding
Mate Jan–Feb; kits born ~April
~9-week (63-day) gestation; first litters often born inside structures — Mass Audubon / ICWDM

The timing answer

The short of it

The verdict · overwintering wildlife

Nocturnal; winter torpor, not hibernation

Raccoons are nocturnal and do NOT truly hibernate — they enter breakable winter torpor below about 15°F and den in NH attics, chimneys, and crawlspaces, waking to forage on mild nights.

NH activity calendar

When are they active — the whole year at a glance

Raccoons are active in New Hampshire every month, but the calendar swings between mating, denning, and birthing depending on the season.

12-month activity · New Hampshire

Peak · Feb, Apr, JunYou are here · Aug

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

PeakActiveBuildingDecliningDormantCurrent season · Summer

Best window to act · Fall (September–October), before raccoons settle into winter dens, and late summer once kits are independent. Avoid sealing during the April–June kit season unless a professional confirms no young are present.

What else peaks thenFeb Apr Jun

Peaks track late-winter mating (Feb) and spring kit-rearing (Apr–Jun); den-seeking climbs toward Manchester's ~Oct 19 first frost (50% probability, NOAA 1991–2020).

Daily activity

What time of day are they active?

Nocturnal

Raccoons are strictly nocturnal, foraging from sunset to sunrise. Winter bends that rule: rather than braving the coldest part of the night, a hungry raccoon may shift to the warmest hours of the day instead.

Daytime foraging can be normal in winter, exploiting warmer daylight temperatures. But a raccoon that is active by day AND disoriented, staggering, aggressive, or paralyzed should be treated as a possible rabies case — do not approach it, and contact animal control. Any bite or scratch is a medical emergency.

A day in their clock

Dawn

Day

Dusk

Night

Dusk (foraging onset)active
Nightpeak
Pre-dawnactive
Daytimelow

Where they go in winter

Winter behavior

Homeowners often ask whether raccoons hibernate. They don't — but what they do instead explains why one can show up in your yard mid-winter.

Overwintering strategy

Winter torpor

Naturally, tree cavities. In NH suburbs, raccoons frequently den in attics, chimneys, garage ceiling voids, crawlspaces, and under porches — all warmer and drier than a tree. They may share dens with other raccoons for warmth.

Move in
Fall den-seeking runs roughly September through November, ahead of the frost; torpor settles in through November and December.
Winter torpor
Naturally, tree cavities. In NH suburbs, raccoons frequently den in attics, chimneys, garage ceiling voids, crawlspaces, and under porches — all warmer and drier than a tree. They may share dens with other raccoons for warmth.
Spring exit
Torpor breaks roughly February–March, but pregnant females stay in the den and give birth around April — making spring the highest-risk season for raccoons raising young inside a home, not an exit from it.

Season by season

A year in the life

Raccoon activity follows a predictable New Hampshire cycle even though the animals are present all year.

01
Spring
Kits are typically born around April after a roughly nine-week gestation, and attics make prime birthing dens. Because kits are immobile for weeks, spring is the highest-risk season for humane timing — sealing a den now can trap dependent young inside.
02
Summer
Mothers rear kits through June, producing the year's heaviest attic damage, then juveniles begin exploring independently by July and family groups forage together through August.
03
Fall
Raccoons gorge to build fat reserves and seek out winter dens as temperatures fall toward the ~Oct 19 frost. This is the best exclusion window of the year, once kits from the spring litter are fully independent.
04
Winter
Below roughly 15°F, raccoons enter torpor and can sleep for days to weeks on stored fat, but they are not true hibernators — they rouse and forage on milder nights or warm winter days, which is why they can still be removed from a den in January or February.

New Hampshire context

Raccoons in southern New Hampshire

Raccoons are common throughout Manchester, Nashua, and Concord, drawn to attics, chimneys, and garage voids that stay far warmer than a natural den tree through the region's long winters. Because they never fully hibernate, NH's cold season doesn't remove the risk — it concentrates it, with mating-season commotion in late winter followed by an April birthing peak inside structures.

Key local data

Raccoons are the primary reservoir of the raccoon rabies variant across the northeastern U.S., and NH Fish & Game classifies them as a rabies-vector species whose live relocation is restricted by state rule — one reason attic and chimney den removal in southern NH should go through a licensed wildlife control operator rather than DIY trapping (NH Fish & Game; CDC). Fall den-seeking accelerates as temperatures drop toward Manchester's ~Oct 19 average first hard frost (NOAA 1991–2020).

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When to act

Timing your treatment

Because raccoons wake every few days even during torpor, winter isn't off-limits for removal — but timing around the spring kit season matters a great deal.

The right window

Fall (September–October), before raccoons settle into winter dens, and late summer once kits are independent. Avoid sealing during the April–June kit season unless a professional confirms no young are present.

Thumping or vocal noises in the attic, especially in Jan–Feb mating season or spring

Roof or soffit damage from a den entry point

A latrine — a concentrated pile of feces — near the den

Any daytime raccoon showing disorientation, staggering, or aggression

A suspected birthing den with dependent kits

Wildlife & Exclusion

Free inspection and same-day wildlife & exclusion service across southern New Hampshire. NH-licensed #782664. Because raccoons are a rabies-vector species and NH restricts relocation, DIY removal is discouraged — use a licensed wildlife control operator.

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Learn more about this pest

Common Questions

Frequently asked

Sources & references

Mass Audubon — Raccoons
nocturnal activity, winter torpor vs. hibernation, den sites, spring kit timing
Internet Center for Wildlife Damage Management (ICWDM) — Raccoons
torpor behavior, ~63-day gestation, denning in structures, damage management
CDC — Rabies: Wild Animals
raccoons as a leading Northeast rabies reservoir; bite/scratch exposure guidance
NH Fish & Game — Nuisance Wildlife
rabies-vector species handling and relocation restrictions
Garden.org — Frost Dates, Manchester NH (NOAA 1991–2020)
Manchester first hard frost ~Oct 19

Editorial disclaimer: This content is provided for informational purposes only and does not constitute pest control advice. Every property is unique — consult a licensed professional for guidance specific to your situation. Anchor Pest Services is licensed in New Hampshire (#782664).

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

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Last updated Jul 2026

Anchor Pest Services

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When Are Raccoons Active? Winter, Night & NH Timing

The short of it

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Sources & references

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When Are Raccoons Active? Winter, Night & NH Timing

The short of it

When are they active — the whole year at a glance

What time of day are they active?

Winter behavior

A year in the life

Spring

Summer

Fall

Winter

Raccoons in southern New Hampshire

Timing your treatment

Frequently asked