In northern climates, the onset of winter often brings wistful sadness for the days of summer. But there are positive things to remember when the leaves turn to gold and fall in the gutters. The flies, mosquitoes, and wood ticks of summer are dead. But when it comes to cockroaches, the winter blues are amplified as the disease-spreading vermin move indoors.
Cockroaches do not thrive in cold weather. Most roach species prefer warm, humid environments because cold temperatures can slow their movement, reduce reproduction, and make it harder for them to survive. While some cockroaches can tolerate cooler conditions for short periods, freezing temperatures are often dangerous or fatal to them.
As temperatures begin to drop, cockroaches actively search for warmer places with access to food and moisture. This is one reason why homeowners may notice increased cockroach activity indoors during the fall and winter months.
During the winter, cockroaches typically move indoors or into protected spaces that stay warm. Instead of remaining outside in freezing conditions, they look for environments where they can continue finding food, water, and shelter. Homes, apartment buildings, garages, wall voids, and utility areas often become ideal hiding spots during colder months.
Cockroaches are especially attracted to dark, secluded areas near moisture sources. They may hide behind appliances, under sinks, inside cabinets, around drains, or near heating systems where temperatures remain stable. In multi-unit buildings, roaches can also travel between walls and shared plumbing systems to escape the cold.
The peskiest and most despised roaches have other tricks up their wings. German cockroaches, which are about half an inch in length, proliferate within the interior walls of apartments and other buildings where it is warmer than 50°. They can live the entire winter reproducing and developing in the rafters and sheet rock of your home.
As the hardiest of roaches, Oriental cockroaches have similar winter game plans. These pests need water to survive, and so they spend winter in sewers, floor drains, crawl spaces, and basements.
The hated American roach cannot survive when temperatures dip to 15°F. The bugs spend winter by hibernating in wood piles or decaying trees. They will also move indoors when chilly winds blow.
Start by sealing cracks and gaps around doors, windows, pipes, and foundations to reduce possible entry points. Keeping kitchens and bathrooms clean, wiping up crumbs and spills, and storing food in sealed containers can also help make your home less appealing to cockroaches. Since roaches are attracted to moisture, repairing leaky pipes and reducing standing water around sinks or drains may help limit activity indoors.
Regularly taking out trash, reducing clutter, and vacuuming hard-to-reach areas can further decrease hiding spots where cockroaches may settle during the winter. If signs of cockroach activity continue, using targeted cockroach baits and control products can help address infestations where roaches hide and travel most often.
Cockroaches breed and proliferate in the summer months when temperatures are high and humid conditions prevail. In autumn, there is a massive roach die-off among some species as temperatures dip below 50°F. When temperatures rise again in spring, the nymphs mature into adults and immediately begin breeding to continue their life cycle.
Roaches have been around for 300 million years, so a little cold snap is not going to kill them off. The bugs can dramatically slow their respiration when it’s freezing, going into a temporary coma. And if you live in Southern California, Florida, Texas, Arizona, or any other sunshine state, you can forget about Mother Nature killing your roaches. You need to place some cockroach bait stations around your home, whatever the weather, for proper prevention.