Fall in Tucson brings cooler temperatures, beautiful sunsets, and unfortunately, an uptick in pest activity. As the desert heat starts to ease, many pests that thrive in the arid climate begin looking for warmth, food, and shelter—often finding it inside your home. Whether you live in the city or in a surrounding rural area, it’s important to know which pests are most active during this season and how to keep them out.
Here are the top five pests Tucson homeowners commonly deal with in the fall—and what you can do to prevent or eliminate them.
1. Scorpions
Scorpions are one of the most feared pests in Southern Arizona, and for good reason. The Arizona Bark Scorpion, in particular, is venomous and known for entering homes in search of moisture and cooler shelter during the dry fall months.
Why They’re a Problem:
Scorpions can hide in shoes, under furniture, or even in your bed. Their sting is painful and potentially dangerous for young children, the elderly, or anyone with allergies.
Prevention Tips:
- Seal all cracks and crevices in your home’s foundation and around windows and doors.
- Eliminate standing water and fix any indoor leaks.
- Keep outdoor areas free of debris, firewood, and clutter where scorpions like to hide.
- Use yellow outdoor lighting to reduce insect activity, which attracts scorpions.
2. Rodents (Mice and Pack Rats)
As temperatures drop, rodents start searching for warm nesting spots—making your attic, garage, or walls prime real estate. Tucson homes are particularly susceptible to pack rats, known for chewing through insulation and wiring.
Why They’re a Problem:
Rodents carry diseases, contaminate food, and cause significant property damage. They reproduce quickly, so even a small infestation can grow rapidly.
Prevention Tips:
- Inspect and seal openings larger than a quarter inch.
- Store food in airtight containers and keep kitchen areas clean.
- Trim back vegetation at least a foot away from the house.
- Regularly inspect attics, crawl spaces, and garages for signs of nesting.
3. Spiders
Many spiders become more active in the fall as they seek shelter and start mating. While most are harmless, Tucson is home to Black Widows and Brown Recluse spiders—both of which can deliver dangerous bites.
Why They’re a Problem:
Spiders often hide in dark, undisturbed areas like closets, garages, and under furniture. While they help control other pests, venomous species pose a risk to families and pets.
Prevention Tips:
- Reduce clutter inside and outside the home.
- Keep outdoor lights off when not needed to reduce insect activity.
- Use weather stripping and door sweeps to limit entry points.
- Vacuum and clean corners, storage areas, and behind furniture regularly.
4. Cockroaches
Cockroaches thrive in Tucson’s desert environment and often invade homes during fall when outdoor food sources become scarce. The American and German cockroaches are the most common household species.
Why They’re a Problem:
Cockroaches are not only unsightly—they’re a health hazard. They spread bacteria, contaminate food, and can trigger allergies and asthma, especially in children.
Prevention Tips:
- Fix water leaks and eliminate moisture sources.
- Keep kitchens and bathrooms clean and dry.
- Store trash in sealed containers and take it out regularly.
- Seal gaps around plumbing and electrical entry points.
5. Termites
Although termites are often associated with spring swarms, subterranean termites in Southern Arizona remain active year-round due to the region’s mild climate. Fall is a great time for homeowners to inspect for signs of activity before major damage occurs.
Why They’re a Problem:
Termites silently destroy wooden structures from the inside out. By the time visible damage appears, the infestation is often well-established.
Prevention Tips:
- Keep wood, mulch, and cardboard away from the home’s foundation.
- Ensure proper drainage and reduce soil-to-wood contact around the structure.
- Schedule regular termite inspections, even if you don’t see signs of damage.
- Consider a preventative barrier treatment if you live in a high-risk area.
Final Thoughts
Fall may bring relief from the summer heat in Tucson, but it also invites a host of pest problems that can threaten your home and health. Staying vigilant during this season is key to avoiding infestations that could escalate quickly. Simple steps like sealing entry points, reducing clutter, and scheduling regular inspections can make a big difference.
While DIY measures can help, some pest problems require professional intervention—especially when dealing with venomous or destructive pests. Acting early in the season can help ensure your home stays pest-free through fall and beyond.
If you’ve noticed signs of pests in or around your home, don’t wait for it to become a bigger issue. Knowing what you’re up against is the first step to keeping your Tucson home protected year-round. We recommend Swift Pest.
