Because cockroaches are cold-blooded and unable to maintain their internal body temperature, they prefer warmer temperatures. Roaches prefer a warmer atmosphere ranging from 77 to 104 degrees  Fahrenheit. Coincidentally, this is about the same temperature as the average home (or attic) in the United States. When mercury levels drop during the winter period, roaches tend to disappear. They go in search of warmer turf.

A cold-blooded cockroach


What temperature kills roaches?

Roaches that venture outdoors during the winter cannot survive cold weather with temperatures of 15 degrees Fahrenheit or below. When cockroaches are unable to find a warm environment, they enter a state of diapause--a form of hibernation. In most cases, these drops in mercury levels will cause the roaches to reproduce at a lower rate. As a way of conserving their energy, roaches will slow down altogether. According to research conducted by the University of Massachusetts, cockroaches depend on the winter to develop.

What do roaches do during winter?

Cockroaches are arthropods that are cold-blooded, thereby, unable to coordinate their body temperature. These pests can adapt to practically any condition except for extremely colder temperatures (below 15 Fahrenheit).  When in an environment lower than 45° F or over 115 F, these creatures' metabolic rate slows, and their growth stops.

As the weather gets cooler, cockroaches begin to seek a warmer place. Often, they seek refuge within our warm home. So, how do cockroaches get in the house? They start heading indoors as a way to stay warm because their ability to develop and reproduce is hindered as the weather turns cold. In addition, many cockroaches will not survive for long in low temperatures.

Do cockroaches die off in winter?

Rather than die off, cockroaches go into a hibernation-like state referred to as diapause. While in this state, the cockroaches' rate of growth and metabolism is completely decreased. The cockroach will survive during the winter so long as they have plenty of water and food.

How do cockroaches stay warm in the winter?

When the temperatures start to get cooler, there are several places cockroaches go to seek shelter from the cold, such as:

  • The ventilation system of a home will attract roaches in their search for food and acquire access to the warmth inside.
  • Often the best protection for roaches from rain, wind, and cold weather is decaying trees or stumps.
  • Wall cracks and wood piles make excellent sources of warmth for cockroaches when the temperature drops. Wood cockroaches prefer wood piles that are left undisturbed for any period of time.
  • Cracks in the walls and ceiling rafters. These spaces offer pests a place that is warm and insulated, quiet, and away from any danger or predators.
  • A chimney top is another place that is warm and safe where cockroaches enter to hide inside.
  • Plumbing drains and pipes are excellent sources of moisture that are attractive to oriental cockroaches in house. These pipes and drains also make great places to hide and tolerate lower temperatures.
  • Another place cockroaches find safe and warm and a haven for lots of food sources are kitchen counters. They prefer hiding behind a kitchen counter to avert being noticed.
  • All homes have electrical appliances with electric motors. These make excellent hiding spots for cockroaches attempting to find warmth. You might discover roaches hiding in coffee machines, microwaves, cookers, and washing machines, just to name a few.
  • One of the most popular hangouts for a cold cockroach is in a warm, humid basement. The basement (or attic) of a home is often the best place for cockroaches to hide and hibernate year-round.

Cockroaches stays in the dirty kitchen to keep warm


Where do roaches go in cold temperatures?

Roaches do not really “go” anywhere during cold weather. Because they are cold-blooded arthropods, they dislike environments that are below 15 Fahrenheit.

The temperature of their body mimics that of the surroundings they live in. Some roaches will go into a form of hibernation known as diapause, allowing their metabolism to reduce and halt growth.

What season do roaches like best?

Weather that is more humid is what roaches like best. This gives them the opportunity to thrive and reproduce quickly. Of all pests, a cockroach is the most resilient. Throughout the ages, the cockroach has been able to adapt to changes in the weather and environment. This ensures their ability to survive even in the cruelest of winters. Sometimes they have to vary their winter plans, but it’s ultimately with the same goal, to survive!

What temperatures will allow roaches to survive?

Because of their cold-bloodedness, roaches do not like cold weather. They often seek warmth indoors and look for ways to get inside. Several roaches are pests that can survive the wintertime. All they require is an area that is maintained at over 50 Fahrenheit, and there are plenty of sources for food.

How small of an opening can a roach fit through?

Cockroaches are very resourceful when it comes to their ability to get inside and find warmth and food. The German cockroach can squeeze through an area that is only 1/16th of its size. German cockroaches can fit into the tiniest of voids or cracks in rock walls. Creating the ideal place to overwinter the cold season.

Oriental cockroach-like being near water sources and floor drains, this is why they prefer to spend the winter inside basements. These pests search out leak faucets, sewers, and drains, usually in the basement, to keep warm. Often, they will find pet food stored down there as well, which offers an excellent food source.

Your kitchen is often a haven for brown-banded cockroaches. Never leave dirty dishes in the sink overnight. Some indoor species of German cockroaches and brown-banded cockroaches enjoy electric appliances, such as microwave ovens. Here, they find warmth and plenty of crumbs left over inside the appliance.

Normally, the American cockroach in house prefers to hang outside. However, as the weather gets cold and the temperatures drop below 50 Fahrenheit, the roaches then venture indoors for food and warmth. If allowed to come indoors, they may survive year-round. Typically, this species of roach will find a decaying tree or wood pile to hibernate inside during winter.

In order to prevent cockroaches from coming into your home or basement, here are several steps to take:

  • Keep crevices and cracks around your home sealed with caulk.
  • Use sealed containers to seal all food.
  • Avoid leaving dirty dishes in the kitchen sink overnight.
  • Put pet food and other food scraps away after fido has eaten.
  • Take out the trash regularly, using receptacles with lids.
  • Get rid of the clutter.

Cockroaches getting inside the trashcans and garbage bags


Are roaches dangerous to humans?

In a scenario, "I found one oriental cockroach in my house," remember that roaches are carriers of bacteria. Thus they do carry other allergens which can cause humans harm and severe illnesses.

Although tiny, cockroaches can be dangerous to humans. However, because of their resilience, roaches are extremely difficult to get rid of. This is why you need a professional pest control company to set up a plan for pest control treatment. What kind of bugs comes out in the winter?

The winter months are not favored by cockroaches. Yet, some nymph species remain active during winter. Surviving in streams and ponds and even under frozen ice.

These insects remain active throughout the winter months. They survive the cold months as eggs, and in the early spring, they come out as adults. In late summer, most cockroach adults die.

Why you should not leave pet food out overnight?

If you leave your pet’s food and water out overnight, you are inviting roaches to a smorgasbord. You might be thinking, "I found one oriental cockroach in my house", then you are giving your pet the option to self-feed. Yet, food left in the dish will dry out the food and collect bacteria. Instead, opt for feeding Fido or Felix two times a day--in the morning and evening. This way, he or she has fresh food when they are hungry, and you keep the pests at bay.

In addition, when your pet is finished eating, clear away all crumbs around the dishes by sweeping and mopping the floor. Put any leftover food in an airtight container and store it in the refrigerator or pantry.

  • The importance of cleaning up food

Always take the trash outside and put it in covered garbage cans. After feeding pets, ensure to clean food scraps right away. Store food in containers with airtight lids.

Clean floors routinely by sweeping, mopping, and vacuuming. Do not leave food scraps out overnight. It opens invitations to roaches. Inspect the home, attic, and garage; roaches love clutter.

Instead of cardboard boxes, use bins made of plastic with locking lids. Avoid using cardboard or newspaper as fillers when storing stuff. Cockroaches love using this type of material for breeding, so doing that will also help you avoid cockroaches naturally.

Are roaches worse in summer or winter?

One might believe that roaches are worse during the summer than in winter. However, most German cockroach species are able to reproduce and continue living throughout the coldest months. They do so within the interior walls, sheetrock, and rafters of private homes and apartment buildings. Wherever temperatures average at least 50 Fahrenheit, a roach will make itself at home.

When it’s time to call a professional

A cockroach on the floor in a cold weather


When you have a winter roach infestation and need help getting rid of it, you need professional pest control experts. Whether you have problems with the infestation of American cockroaches, Oriental cockroaches, or German cockroaches, A.N.T. Pest Control New Lenox can get rid of them year-round.

When the temperature falls, we can help find all their hibernation spots. Stop keeping your house warm for roaches and get rid of them for good. Call A.N.T. Pest Control today. We will eradicate any cockroach infestation so you can enjoy your warm house without unwanted pests.

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1200 S Cedar Rd #2D/E
New Lenox, IL 60451


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