The Most Common Pests You’ll See in the Fall and Winter Months

Ants

You know that cozy feeling when fall rolls in — the air cools down, you pull out your favorite hoodie, and maybe you finally get to enjoy a warm drink on the porch without melting? Well, while you’re enjoying the season, pests are feeling something very different: homeless.

That’s right — as temperatures drop, bugs and rodents start looking for the same things we do: warmth, food, and shelter. And unfortunately, your home checks all three boxes.

Here’s a breakdown of the most common pests we see in Rialto, Fontana, and the surrounding Southern California areas during the cooler months, what brings them inside, and why a recurring pest control service is the best way to keep them out for good.

🕷️ Spiders – The Unwanted Roommates

When the weather cools down, spiders head indoors looking for warmth and food — aka, the bugs already hiding in your home. You’ll often see them around baseboards, garages, attics, and ceiling corners.They’re not trying to be rude — they just prefer your climate-controlled home to the chilly outdoors.

What they eat: Other insects, which means if you’re seeing more spiders, there’s probably already a food source in your home.

Why it’s best to act fast: A few spiders can turn into webs in every corner before you know it. Regular pest control helps cut off their food supply and keeps both bugs and spiders away.

🐜 Ants – The Winter Wanderers

You’d think ants disappear in the colder months, but around here, they just move indoors. Kitchens, bathrooms, and wall voids are their favorite hangouts.

Where they come from: Outdoor colonies seeking warmth and moisture.

What they want: Food crumbs, grease, and water leaks.

Why they keep coming back: Once they find a reliable food source, they leave behind pheromone trails — basically, a “follow me” map for the rest of the colony.

Why recurring service matters: One-time sprays can kill the ants you see, but they don’t stop new colonies from forming. Consistent treatments break the cycle before it starts.

🐭 Mice and Rats – The Winter Crashers

When the nights get cooler, rodents make their move. You might hear scratching in the walls, find droppings in the pantry, or notice insulation in the attic getting torn up.

Where they come from: Gaps under doors, roof vents, garages, and even plumbing lines.

What they’re after: Warm shelter and an easy meal — pet food, bird seed, and crumbs.

Why you shouldn’t wait: Rodents chew through wires, contaminate food, and multiply fast. A single pair can turn into dozens by the time winter’s over.

How TruPest handles it: We locate entry points, set traps, and use exclusion methods to seal up your home — so the rats move out and can’t move back in.

🪳 Cockroaches – The Hidden Guests

Cooler weather doesn’t stop roaches; it just pushes them inside. In Southern California, German cockroaches and Turkistan roaches are the most common culprits.

Where you’ll find them: Kitchens, bathrooms, behind appliances, and under sinks.

What they eat: Just about anything — crumbs, grease, even soap residue.

Why you don’t want them: They reproduce rapidly, contaminate surfaces, and can trigger allergies or asthma.

The fix: Professional treatments target the areas they hide and breed — not just the ones you see. Follow-up visits ensure they don’t return once temperatures rise again.

🦟 Fleas and Ticks – The Sneaky Hitchhikers

Even in fall and winter, fleas and ticks can survive on pets or in shaded outdoor areas. If your pets go outside, they can easily bring these pests in with them.

Where they hide: Carpets, bedding, and furniture.

What they eat: Blood from pets (and sometimes humans).

Why recurring pest control helps: Ongoing treatments kill both adult fleas and developing eggs, keeping your pets and home protected year-round.

🌡️ Why Recurring Pest Control Is Worth It Year-Round

Pests don’t just disappear when the weather changes — they adapt. Once they’ve found their way inside, they can breed, hide, and return even stronger next season.

That’s why TruPest Solutions offers recurring pest control services that protect your home through every season. Our 5-Point Service covers:

1. Full inspection

2. Web removal

3. Power spray around exterior walls and foundations

4. Lawn granulation

5. Interior treatment if needed

This proactive approach keeps bugs and rodents from gaining a foothold in the first place — not just treating them once they’ve already moved in.

📞 Keep Pests Out This Fall and Winter with TruPest Solutions

If you’re seeing more spiders, ants, or hearing scratching in the attic, it’s time to act. Don’t wait for things to get worse — protect your home now with professional pest control you can trust.

Call TruPest Solutions today at 951-334-5288 or visit TruPestSolutions.com to schedule your seasonal pest control service and keep your home pest-free year-round.