The short version
Most spiders in Anaconda are harmless. Black widows live here, as in every lower-48 state. Anaconda 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.
Homeowners and renters in Anaconda who'd like fewer spiders, and peace of mind about the dangerous ones.
What to look for
Spiders follow their food. More insects means more spiders. Most are harmless and even helpful. Webs and egg sacs keep the cycle going.
- 1Spiders in bathtubs and sinks in late summer.
- 2Fresh cobwebs in corners days after cleaning them.
- 3Webs under deck boards and outdoor furniture.
- 4Shed spider skins on windowsills and baseboards.
- 5A pale spider in a silk retreat high on a wall.
- 6Webs clustered around porch lights and windows.
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
A pro in Anaconda starts by walking the exterior, garage, basement and eaves with a flashlight, noting webs and where insects gather. The goal is to name the species before deciding anything.
- Time
- 45–90 minutes
- Best for
- Every job; the species decides how much to do
Monitoring and Follow-Up
$50–$150 per visit
Trap counts give an honest read. If numbers keep falling, the plan is working. If not, a good pro changes approach.
- Time
- 20–45 minutes
- Best for
- Confirming results; recluse or widow properties
Sealing Gaps, Lighting and Prey Reduction
$150–$450
Sealing gaps also cuts their food supply. Indoor spiders eat flies, silverfish and pantry pests. Fixing those problems starves the spiders.
- Time
- 1–4 hours
- Best for
- Long-term reduction; homes near woods, water or fields
Exterior Perimeter Treatment and Void Dusting
$150–$350
Sprays alone do a mediocre job on spiders, which is why Anaconda pros pair them with dusting. A light dust goes into weep holes, voids and behind fixtures.
- 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.
Lidded plastic bins beat open boxes and loose piles for keeping spiders out of stored clothes and bedding.Which spiders live around Anaconda.
Despite their reputation, they aren't considered dangerous. Most spiders in Anaconda homes are house spiders, cellar spiders, jumping spiders and wolf spiders. All are harmless to people. Around Anaconda, they're western black widows, usually hiding under decks, grills and meter covers. Brown recluses don't live around Anaconda. Most suspects turn out to be harmless look-alikes. Hobo spiders are common in the Northwest.
Local spiders conditions in Anaconda.
A provider who works Anaconda and Montana 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. Anaconda sits in a semi-arid continental climate, and that sets the pace for spider activity here: late summer through fall (August-October). Across Anaconda, the area is mostly rural, 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 Anaconda usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Anaconda'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.
Dense shrubs, mulch and stone walls close to the house give spiders cover right up to the siding.When you’ll see more of them.
Clear egg sacs in winter. You'll see the most in late summer and fall. That's when males wander. Winter lows around 14°F in Anaconda slow spiders outside, but house spiders carry on indoors. Spring brings a new hatch.
Where they hide in houses here.
Clutter gives them endless hiding spots. Plenty of homes in Anaconda have basements, and basements are spider central. Check window wells, storage areas and the sill plate.
A year of spiders in Anaconda.
- Spring: new spiderlings hatch. Vacuum webs and egg sacs. - Summer: highs near 82°F in Anaconda bring more insects, and more spiders. - Fall: males wander indoors. Peak spider season. - Winter: with lows near 14°F in Anaconda, a good time to clear clutter and seal gaps.
Harmless or worth a closer look?
- Black widow: shiny black, red hourglass underneath. Leave it alone. - Brown recluse: tan, violin mark on its back, plain legs. - Wolf spider: big, hairy and fast. Harmless. - Cellar spider: tiny body, very long legs. Harmless. - Jumping spider: small, fuzzy, hops. Harmless. - Orb weaver: big round web outside. Harmless.
If you think you’ve been bitten.
Use a cool compress. Raise the area if you can. See a doctor for severe pain, cramping or spreading redness. If you can, safely catch the spider for identification. Wash the bite with soap and water.
Fewer spiders, the easy way.
- Lights: yellow bug lights draw fewer insects. - Gaps: add door sweeps and repair screens. - Clutter: store things in sealed plastic bins, not cardboard. - Webs: vacuum webs and egg sacs every few weeks. - Shoes and gloves: shake them out before use. - Beds: keep them a few inches from the wall.
Webs outside: leave some, clear some.
- Garden orb weavers: leave them. They catch flies and mosquitoes. - Doorways and porch lights: brush webs away weekly. - Eaves and window frames: a long-handled brush works well. - Woodpiles: keep them off the ground and away from the house. - Gloves: wear them when moving firewood, pots or patio cushions.
Spider myths.
- Swallowing spiders in your sleep: no evidence it happens. - Daddy longlegs are deadly: no. They’re harmless. - Spiders move in for winter: most house spiders never leave. - Every blister is a recluse bite: most aren’t spider bites.
Spiders and pets.
A widow bite can sicken a dog or cat. your vet. Some sprays are risky for cats. Ask the company which products are cat-safe. Most spiders are no threat to pets.
What a spider visit looks like.
The tech walks the outside first. They knock down webs and egg sacs around eaves and windows. They treat cracks, gaps and hiding spots, not open lawn. Inside, they focus on corners, closets and the garage. Most visits take about an hour.
Sticky traps tell you a lot.
Set sticky traps along baseboards, behind furniture and in the garage. Check them after a week. They show which spiders you have and where they travel.
Outdoor lights and spiders.
Porch lights draw insects, and insects draw spiders. Yellow bulbs attract fewer bugs. Motion-sensor lights help too.
Cellar spiders in the basement.
Long-legged cellar spiders hang in basement corners. They're harmless and even eat other spiders. A dehumidifier and a broom keep them in check.
Spiders in the garage.
Garages collect webs, boxes and insects. Store things in sealed bins off the floor. A door sweep and a sticky trap by the door help.
Questions to ask before you sign.
- Which spiders did you find? - Where will you treat, inside and out? - Is web and egg-sac removal included? - Will you seal gaps or add door sweeps? - What happens if they come back? - When can kids and pets go back in?
What affects the price
- Local labor rates and travel distance.
- Crawl space or basement access and moisture.
- Whether outbuildings, sheds and decks are included.
- Number of follow-up visits included.
- Eave depth and roofline height.
- Bundling with an existing general pest plan.
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What's your biggest concern about spiders?
When to call for help
High eaves and attics are worth leaving to a pro. Call if a black widow is near where kids play. if spiders keep coming back after cleaning.
What you can do yourself
Start simple. Switch to yellow bug lights. Add door sweeps and store things in sealed bins. Skip foggers. They don't reach hiding spots. A pro adds targeted treatment in cracks and voids.
Spiders in Anaconda
Across Anaconda, most of the housing is rural, so the usual entry points, moisture spots, and sheltered areas near the structure are what an inspection checks first. Across Anaconda, take a minute to note where you have seen activity and when it appears, so the inspection is faster and the quote more accurate. A local provider who knows Anaconda and Montana can point out the specific conditions that matter most here before you commit to a plan. Anaconda only gets about 14 inches of rain a year, so spiders gather where insects find water: garages, sprinkler zones and shaded walls. Around Anaconda's open land, barns, sheds and woodpiles host widows and wolf spiders. Anaconda has a semi-arid continental climate, and spiders activity here tends to pick up late summer through fall (August-October).
Local research
Spiders in Anaconda, MT: what the public record shows
Before you compare quotes, it helps to know which spiders actually live in Montana, when they are busiest around Anaconda, and what the state figures look like. Everything below links to the agency or university page it came from.
Spider species recorded in Montana
- Western black widow (Latrodectus hesperus) — 'The black widow spider, Latrodectus hesperus, is the most common harmful spider in California' and 'occur in most parts of California' (UC IPM); 'common in Colorado' (CSU); Lat…
- 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 Anaconda
Western black widows are present throughout Montana and shelter in woodpiles, burrowing sites and low-traffic areas around homes; MSU Extension emphasizes habitat modification near entrances (MSU Urban IPM).
MSU Extension Urban IPM: 'The brown recluse is not native to Montana' and no specimen has ever been positively identified in the state by a trained arachnologist or entomologist; 'it is extremely unlikely that any diagnosed spider bite from this area is from a brown recluse.' A recluse could only arrive as a hitchhiker in shipments or boxes.
Rules that apply in Montana
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: Montana State University Extension Urban IPM; CDC/NIOSH; Pest Notes: Spiders (PN 7442); Hobo Spider. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep spiders away
- Put exterior lights on motion sensors.
- Repair torn window and vent screens.
- Keep beds a few inches from the wall.
- Wear gloves when handling outdoor furniture.
- Reduce clutter in closets and storage rooms.
- Switch porch bulbs to warm or yellow LEDs.
Under-sink cabinets get checked for gaps around pipes, which spiders and their prey both use.Did you know?
Male black widows are tiny, patterned and harmless
Cellar spiders hunt and eat other spiders, including widows
Questions people ask
How do I know if I have a black widow?
They hide under furniture, grills and meter covers. Don't handle it. Look for a shiny black spider with a red hourglass underneath.
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 do I choose a spider control company?
Ask them to identify the spiders before treating. Ask what's included and what happens if they come back. Check that they're licensed in Montana.
Do brown recluses live in my area?
Probably not. Montana is outside the brown recluse range.
What attracts spiders to a house?
Spiders follow insects to porch lights, damp spots and clutter. Cut the insects and spiders follow. Food, mostly.
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.
What does a spider spray cost?
Local quotes vary; ask for a written estimate.
Are there dangerous spiders in Anaconda?
Black widows, yes, as almost everywhere. Most other spiders here are harmless.
When are spiders worst in Anaconda?
Late summer and fall, when males wander.
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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