​You dip into the garage to grab a box, and there it is — a wolf spider sitting on the wall right next to your hand. Or maybe you noticed a spider sitting in a web in the corner of the patio. If it feels like spiders are showing up more often in your home, you're not imagining it.

Here at Northwest Exterminating, we see a noticeable jump in spider-related calls once temperatures stay above 100°F across Phoenix and Tucson. The connection between Arizona's summer heat and spider activity is straightforward, and it helps explain why so many homeowners see more spiders this time of year.

spider in shed in phoenix az

What Drives Spiders Into Arizona Homes During Summer?

Spiders go where the food is. When extreme heat pushes insects like crickets, earwigs, and ants closer to your home in search of cooler conditions and water, spiders follow right behind them.

It's a chain reaction. The hotter it gets outside, the more insects cluster around foundations, garages, and covered patios. Spiders set up shop nearby because they don't have to go far to eat. Once the insects move inside, the spiders eventually do too.

This is especially noticeable in neighborhoods across the Phoenix metro and Tucson, where homes sit close to desert landscaping. Rock yards, block walls, and concrete patios hold heat during the day and attract insects after dark — which is exactly when most spiders are hunting.

Where Our Technicians Find Spiders Most Often

During quarterly visits, our team consistently finds spiders in the same areas. Knowing where to look makes a big difference in how effectively they're controlled.

Garages are one of the most common areas. They're warm, often cluttered, and the gap under the garage door is one of the easiest entry points for insects and the spiders that follow them. We regularly find webbing along ceiling corners, behind storage shelves, and near the water heater.

Block walls are another hotspot. The hollows inside decorative block fencing create ideal hiding spots for spiders — dark, sheltered, and close to insect activity along landscape borders. Homeowners in Scottsdale, Queen Creek, and Chandler with block-wall perimeters see this regularly.

Pool equipment enclosures, outdoor storage sheds, and covered patios are also common. Any structure that stays relatively undisturbed becomes prime territory. If you're noticing webs in these areas, a pest control plan that treats the perimeter can make a real difference.

Are Black Widow Spiders More Active in Summer?

Yes. Black widows are among the most common spiders we hear about from Arizona homeowners, and their activity does peak during the warmer months. They prefer low-to-the-ground hiding spots — under patio furniture, inside meter boxes, around pool pump housings, and in ground-level storage.

Our technicians commonly find black widow webbing in corners of garages, along the base of block walls, and underneath outdoor stairs. The webs are distinctive — messy, irregular, and strong. If you're seeing webs like that near ground level, it's worth having someone check them out.

One thing we notice in homes across Tucson's east side and the foothills — properties near washes or undeveloped desert tend to see more black widow activity because the surrounding habitat supports larger insect populations that these spiders feed on.

Why Some Homes See More Spider Activity Than Others

Not every home experiences the same level of spider pressure during the summer. Properties with dense landscaping, outdoor lighting, block-wall fencing, irrigation systems, or nearby desert habitat often attract more insects, which means more food for spiders.

We've found that homes near washes, undeveloped desert, or open space often experience higher spider pressure because insect populations tend to be larger in those areas.

This is one reason two homes on the same street can have very different spider problems. The conditions around the property often determine how attractive it is to both insects and the spiders that hunt them.

If you're noticing more webs, more spiders in the garage, or increased activity around patios and outdoor living spaces, it's often a sign that the surrounding environment is supporting the insects they're feeding on.

Why Killing Individual Spiders Doesn't Solve the Problem

If you're swatting spiders one at a time or knocking down webs every few days, you already know — they come right back. That's because the spiders aren't the root issue. The insects attracting them are.

As long as crickets, ants, earwigs, and other prey insects are active around your home's perimeter, new spiders will move in to replace the ones you remove. Store-bought sprays might eliminate the spider you can see, but they don't create the kind of lasting barrier that reduces the insect population drawing them there.

That's where quarterly treatment changes things. By treating the perimeter consistently, you reduce the insects that spiders rely on. Fewer prey insects means fewer spiders setting up near your home.

How Quarterly Pest Control Reduces Spider Activity

Northwest Exterminating's home pest control plans are designed to break this cycle. Each quarterly visit includes perimeter treatment along the foundation, around entry points, and in conducive areas where insects and spiders tend to concentrate.

Our technicians also perform web removal during every service. This eliminates active webs, egg sacs, and the spiders themselves, while the perimeter barrier reduces the insects that attract new ones. Over time, spider pressure around the home decreases significantly.

At Northwest Exterminating, we also offer our Desert Guard. This exclusion service seals common entry points that spiders, insects, and rodents often exploit. It's especially effective for homes in areas with heavy desert pest pressure.

If spiders are becoming a regular problem in your home, reach out to us. We can inspect your property and recommend the right level of protection.

Frequently Asked Questions

What time of year are spiders most active in Arizona?

Spider activity occurs year-round in Arizona, but most homeowners notice the biggest increase from late spring through early fall. Higher temperatures lead to increased insect activity, attracting more spiders around homes.

Do newly built homes get spiders?

Yes. New homes can still attract spiders, especially if they border desert habitat or have landscaping, irrigation, and outdoor lighting that attract insects.

Why do spiders show up in clean homes?

Spiders are attracted to food sources, not dirt. Even a clean home can attract spiders if insects are active around the property.

Are spiders more common near desert preserves and washes?

Often, yes. Homes near washes, open desert, and undeveloped land typically have more insect activity, which can lead to more spiders around the property.

Northwest Exterminating Can Help Keep Spiders Out of Your Arizona Home

Northwest Exterminating has been protecting homes across Phoenix, Tucson, and Southern Arizona since 1990. If spiders are showing up inside your home or building webs around your property, contact us for a free consultation. We'll inspect your home, identify what's attracting them, and put a plan in place to keep them out.