The short version
Most spiders in St. George are harmless. Black widows live here, as in every lower-48 state. St. George is outside the brown recluse range, so most 'recluses' here are look-alikes. Identify first, then treat.
- Most house spiders are harmless.
- Black widows live in every lower-48 state.
- Brown recluses don’t live here.
- Skip foggers; they don’t reach hiding spots.
- Yellow bug lights and door sweeps help a lot.
Anyone in St. George who's spotted a spider and wants to know if it matters.
What to look for
Spiders follow their food. More insects means more spiders. Most are harmless and even helpful. St. Webs and egg sacs keep the cycle going.
- 1Silk strands stretched across windows after wind.
- 2Shed spider skins on windowsills and baseboards.
- 3Webs clustered around porch lights and windows.
- 4A shiny black spider with a red hourglass underneath.
- 5Spiders in bathtubs and sinks in late summer.
- 6Round or teardrop egg sacs tucked into eaves and window frames.
Why it’s worth acting soon
- Egg sacs hatch hundreds of spiderlings.
- Webs build up in eaves, corners and garages.
- Widows nest under outdoor furniture and grills.
Treatment options and typical costs
Inspection and Species Identification
$75–$200
Some pros fold the inspection into the first service fee, so ask how it is billed. Either way, treating without identifying is guesswork.
- Time
- 45–90 minutes
- Best for
- Every job; the species decides how much to do
Sealing Gaps, Lighting and Prey Reduction
$150–$450
Moths and midges come to bright white porch lights, and spiders come for the moths and midges; on St. George's summer nights swapping to a yellow bug bulb thins both. Yellow bulbs away from doors make a real difference.
- Time
- 1–4 hours
- Best for
- Long-term reduction; homes near woods, water or fields
Web and Egg-Sac Removal
$100–$250
Sweeping webs is not cosmetic. Web removal around a home takes away hiding spots and forces spiders to rebuild in the open, where they are easier to see and manage.
- Time
- 30–90 minutes
- Best for
- Visible webbing on eaves, porches, sheds and basements
Exterior Perimeter Treatment and Void Dusting
$150–$350
Once webs are down, a technician in St. George applies a residual product along the foundation, around door and window frames, and under eaves. Spiders crossing those bands pick up the product.
- Time
- 45–120 minutes
- Best for
- Heavy exterior activity, widows or recluses confirmed
Prices are typical published ranges. Ask what’s included before you compare quotes.
Where brown recluses live, they like quiet spots under beds and furniture, so a flashlight check along the frame is worth a minute.Which spiders live around St. George.
George homes are house spiders, cellar spiders, jumping spiders and wolf spiders. All are harmless to people. Around St. George, they're western black widows, usually hiding under decks, grills and meter covers. Brown recluses don't live around St. George. Most suspects turn out to be harmless look-alikes. Hobo spiders are common in the Northwest. Despite their reputation, they aren't considered dangerous. Most spiders in St.
Local spiders conditions in St. George.
George sits in a hot desert climate, and that sets the pace for spider activity here: late summer through fall (August-October). In St. George, the area is mostly suburban, so spiders pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. An inspection in St. George usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing St. George's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote. A provider who works St. George and Utah every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options. St.
Leaf piles against the foundation are prime fall shelter for spiders looking for a way inside.When you’ll see more of them.
That's when males wander. Winter lows around 31°F in St. George slow spiders outside, but house spiders carry on indoors. Spring brings a new hatch. Clear egg sacs in winter. You'll see the most in late summer and fall.
Where they hide in houses here.
George have basements, and basements are spider central. Check window wells, storage areas and the sill plate. Clutter gives them endless hiding spots. Plenty of homes in St.
A year of spiders in St. George.
- Spring: new spiderlings hatch. Vacuum webs and egg sacs. - Winter: with lows near 31°F in St. George, a good time to clear clutter and seal gaps. - Fall: males wander indoors. Peak spider season. - Summer: highs near 102°F in St. George bring more insects, and more spiders.
Harmless or worth a closer look?
- Black widow: shiny black, red hourglass underneath. Leave it alone. - Orb weaver: big round web outside. Harmless. - Jumping spider: small, fuzzy, hops. Harmless. - Cellar spider: tiny body, very long legs. Harmless. - Wolf spider: big, hairy and fast. Harmless. - Brown recluse: tan, violin mark on its back, plain legs.
If you think you’ve been bitten.
See a doctor for severe pain, cramping or spreading redness. Raise the area if you can. Use a cool compress. Wash the bite with soap and water. If you can, safely catch the spider for identification.
Fewer spiders, the easy way.
- Lights: yellow bug lights draw fewer insects. - Beds: keep them a few inches from the wall. - Shoes and gloves: shake them out before use. - Webs: vacuum webs and egg sacs every few weeks. - Clutter: store things in sealed plastic bins, not cardboard. - Gaps: add door sweeps and repair screens.
Webs outside: leave some, clear some.
- Garden orb weavers: leave them. They catch flies and mosquitoes. - Gloves: wear them when moving firewood, pots or patio cushions. - Woodpiles: keep them off the ground and away from the house. - Eaves and window frames: a long-handled brush works well. - Doorways and porch lights: brush webs away weekly.
Spider myths.
- Swallowing spiders in your sleep: no evidence it happens. - Every blister is a recluse bite: most aren’t spider bites. - Spiders move in for winter: most house spiders never leave. - Daddy longlegs are deadly: no. They’re harmless.
Spiders and pets.
Some sprays are risky for cats. your vet. A widow bite can sicken a dog or cat. Most spiders are no threat to pets. Ask the company which products are cat-safe.
What a spider visit looks like.
They treat cracks, gaps and hiding spots, not open lawn. They knock down webs and egg sacs around eaves and windows. The tech walks the outside first. Most visits take about an hour. Inside, they focus on corners, closets and the garage.
Sticky traps tell you a lot.
Check them after a week. Set sticky traps along baseboards, behind furniture and in the garage. They show which spiders you have and where they travel.
Outdoor lights and spiders.
Yellow bulbs attract fewer bugs. Porch lights draw insects, and insects draw spiders. Motion-sensor lights help too.
Cellar spiders in the basement.
They're harmless and even eat other spiders. Long-legged cellar spiders hang in basement corners. A dehumidifier and a broom keep them in check.
Spiders in the garage.
Store things in sealed bins off the floor. Garages collect webs, boxes and insects. A door sweep and a sticky trap by the door help.
Questions to ask before you sign.
- Which spiders did you find? - When can kids and pets go back in? - What happens if they come back? - Will you seal gaps or add door sweeps? - Is web and egg-sac removal included? - Where will you treat, inside and out?
What affects the price
- Home size and number of stories.
- Eave depth and roofline height.
- Wooded, wet or open-field surroundings.
- Season and how heavy current activity is.
- Whether a widow or recluse is confirmed.
- Amount of clutter in garage, basement and storage.
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What's your biggest concern about spiders?
When to call for help
if spiders keep coming back after cleaning. High eaves and attics are worth leaving to a pro. Call if a black widow is near where kids play.
What you can do yourself
A pro adds targeted treatment in cracks and voids. They don't reach hiding spots. Skip foggers. Add door sweeps and store things in sealed bins. Switch to yellow bug lights. Start simple.
Spiders in St. George
George that starts outside and works inward usually finds the entry points, moisture, and shelter that matter most before anyone treats. An inspection in St. George has a hot desert climate, and spiders activity here tends to follow late summer through fall (August-October). St. George's neighborhoods, eaves, porch lights, woodpiles and garages are spider favorites. In St. George only gets about 8 inches of rain a year, so spiders gather where insects find water: garages, sprinkler zones and shaded walls. St.
Local research
Spiders in St. George, UT: what the public record shows
Before you compare quotes, it helps to know which spiders actually live in Utah, when they are busiest around St. George, and what the state figures look like. Everything below links to the agency or university page it came from.
Hobo spider detection in Pacific Northwest
An introduced European species that has since spread across the Intermountain West.
Utah State University ExtensionSpider species recorded in Utah
- Hobo spider (Eratigena agrestis) — European funnel weaver 'detected in the Pacific Northwest in 1936', now 'throughout northern Utah' and 'throughout Washington'. Current extension/health stance: not medically si…
When spiders are busiest around St. George
'They are frequently found in Utah homes from August through October' as males seek mates (USU).
'This species is now distributed throughout northern Utah.' 'No significant scientific evidence suggests that hobo spiders have a necrotic (flesh-eating) bite' (USU).
For context, nationally
- Throughout North America, but are most common in the southern and western United States — Black widow distribution. CDC/NIOSH
- In the midwestern and southern United States — Brown recluse distribution. CDC/NIOSH
Sources: Hobo Spider; CDC/NIOSH. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep spiders away
- Fix leaks and standing water in crawl spaces.
- Store items in sealed plastic bins, not cardboard.
- Check meter boxes and grills before reaching in.
- Stack firewood well away from the house.
- Repair torn window and vent screens.
- Cover weep holes with fine mesh, not caulk.
Monitors along baseboards show whether spider numbers are actually falling after treatment.Did you know?
Weight for weight, spider silk is stronger than steel.
Some spiders can survive months without a meal
Questions people ask
Do spider sprays actually work?
Removing webs and egg sacs and sealing gaps works better. They rarely reach hiding spots. Store-bought sprays kill what they touch.
Should I use a fogger or bug bomb for spiders?
They can also be a fire risk if used wrong. Foggers don't reach where spiders hide. No.
Do brown recluses live in my area?
Probably not. Utah is outside the brown recluse range.
Why are there suddenly so many spiders in fall?
It usually settles down in a few weeks. Many end up indoors by accident. Males wander in late summer and fall looking for mates.
Why do spiders keep coming back after I clean?
Usually because the insects they eat are still around. Egg sacs and gaps around doors also keep them coming.
How much is quarterly pest control for spiders?
It's a published estimate, not a local quote. George, ask each company what's typical on your street. As you collect quotes in St. George, for a homeowner who wants spiders kept down rather than treated once, Local quotes vary; ask for a written estimate. In St.
Does every house have spiders?
Nearly, based on the best available room-by-room study. In the 2012 study by Bertone and colleagues, entomologists searched 50 volunteer homes in North Carolina room by room and found spiders in every one, which shows how common spiders are indoors.
Are there dangerous spiders in St. George?
Most other spiders here are harmless. St. Black widows, yes, as almost everywhere.
When are spiders worst in St. George?
Late summer and fall, when males wander.
Nearby cities
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Sources (12)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Spider Exterminator · Updated September 11, 2026 · How we write these guides