The short version
Most spiders in Florence are harmless. Black widows live here, as in every lower-48 state. Brown recluses turn up in parts of South Carolina, so get a suspect spider identified. Identify first, then treat.
- Most house spiders are harmless.
- Black widows live in every lower-48 state.
- Brown recluses live in this area; know the violin mark.
- Skip foggers; they don’t reach hiding spots.
- Yellow bug lights and door sweeps help a lot.
Homeowners and renters in Florence who'd like fewer spiders, and peace of mind about the dangerous ones.
What to look for
Most are harmless and even helpful. Webs and egg sacs keep the cycle going. Spiders follow their food. More insects means more spiders.
- 1Shed spider skins on windowsills and baseboards.
- 2Fresh cobwebs in corners days after cleaning them.
- 3Webs across doorways or gates each morning.
- 4Dead insects wrapped in silk along ledges.
- 5Egg sacs, round or teardrop-shaped, tucked in eaves and frames.
- 6Spiders wandering across walls at night.
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.
- Recluses hide in boxes, shoes and stored clothing.
Treatment options and typical costs
Inspection and Species Identification
$75–$200
Most spiders found in Florence homes are harmless house spiders, cellar spiders or orb weavers. A careful look in Florence separates those from a black widow or, where they occur, a brown recluse.
- Time
- 45–90 minutes
- Best for
- Every job; the species decides how much to do
Web and Egg-Sac Removal
$100–$250
Around Florence, this starts outside, then moves to garages, basements and crawl spaces. The debris is bagged rather than left to hatch.
- Time
- 30–90 minutes
- Best for
- Visible webbing on eaves, porches, sheds and basements
Monitoring and Follow-Up
$50–$150 per visit
Ask for a written note of what the follow-up found. Tracking traps shows whether the plan works.
- Time
- 20–45 minutes
- Best for
- Confirming results; recluse or widow properties
Exterior Perimeter Treatment and Void Dusting
$150–$350
Once webs are down, a technician in Florence 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.
Basements stay dark, damp and quiet, which is everything a spider wants.Which spiders live around Florence.
They're tan, with a dark violin shape on the back. Most spiders in Florence homes are house spiders, cellar spiders, jumping spiders and wolf spiders. All are harmless to people. Around Florence, they're southern black widows, usually hiding under decks, grills and meter covers. Brown recluses turn up in parts of South Carolina.
Local spiders conditions in Florence.
A provider who works Florence and South Carolina 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. Florence sits in a humid subtropical climate, and that sets the pace for spider activity here: late summer through fall (August-October). Across Florence, 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 Florence usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Florence'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 vent that closes properly keeps spiders from using it as a winter doorway.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 36°F in Florence slow spiders outside, but house spiders carry on indoors. Spring brings a new hatch.
Where they hide in houses here.
Check crawl vents, the crawl door and the undersides of porches. Inside, check closets and corners. Recluses like undisturbed spots: boxes, closets, shoes and attic storage. Many houses around Florence have crawl spaces, and cellar spiders and widows love them.
A year of spiders in Florence.
- Spring: new spiderlings hatch. Vacuum webs and egg sacs. - Summer: highs near 93°F in Florence bring more insects, and more spiders. - Fall: males wander indoors. Peak spider season. - Winter: with lows near 36°F in Florence, 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
- Bundling with an existing general pest plan.
- Door sweeps, screens and sealing work.
- Lighting changes recommended or performed.
- One-time visit versus recurring plan.
- Wooded, wet or open-field surroundings.
- Whether a widow or recluse is confirmed.
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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. if spiders keep coming back after cleaning. if you suspect a recluse indoors. Call if a black widow is near where kids play.
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 Florence
Florence has a humid subtropical climate, and spiders activity here tends to follow late summer through fall (August-October). An inspection in Florence that starts outside and works inward usually finds the entry points, moisture, and shelter that matter most before anyone treats. With about 48 inches of rain a year and humidity near 71%, Florence supports plenty of insects, and spiders follow them. In Florence's neighborhoods, eaves, porch lights, woodpiles and garages are spider favorites.
Local research
Spiders in Florence, SC: what the public record shows
Before you compare quotes, it helps to know which spiders actually live in South Carolina, when they are busiest around Florence, and what the state figures look like. Everything below links to the agency or university page it came from.
Spider species recorded in South Carolina
- Southern black widow (Latrodectus mactans) — 'Found in the southeastern region and has been found as far north as Ohio and as far west as Texas' (UF/IFAS); confirmed in Pennsylvania (Penn State) and one of two dangerous sp…
- Brown widow (Latrodectus geometricus) — 'Introduced into Florida and is now found throughout the state', spread into South Carolina; spiky egg sac 'much like the seed of a sandspur'; venom reported 'as toxic as the bl…
- Joro spider (Trichonephila clavata) — 'Established in Georgia, North Carolina, South Carolina, Tennessee, Alabama, and spreading to adjacent regions. There are also isolated populations found in Maryland, Virginia,…
When spiders are busiest around Florence
Joro spiders: 'Every late fall for the last few years, we've seen a massive uptick in the number of Joro spiders in South Carolina' (Clemson).
Joro spiders were 'Initially just found in the Upstate, they can now be found in the Piedmont and Sandhill regions, too' (Clemson). Brown widows have spread into South Carolina (Clemson HGIC). UC Riverside places the brown recluse range boundary at the westernmost tip of the state only.
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: CDC/NIOSH; EENY 560: Southern Black Widow, Latrodectus mactans; Brown Widow Spider (HGIC factsheet); Joro Spider: Trichonephila clavata (Circular 1273). Figures are quoted as the source prints them. How we check our sources
Simple ways to keep spiders away
- Move fixtures away from doors where possible.
- Reduce clutter in closets and storage rooms.
- Inspect items brought in from sheds and garages.
- Keep garage doors closed and weatherstripped.
- Fix leaks and standing water in crawl spaces.
- Switch porch bulbs to warm or yellow LEDs.
Compare quotes on what they include: web removal, treatment, sealing and any follow-up visit.Did you know?
Some spiders can survive months without a meal
Cellar spiders hunt and eat other spiders, including widows
Questions people ask
Why are there suddenly so many spiders in fall?
Many end up indoors by accident. It usually settles down in a few weeks. Males wander in late summer and fall looking for mates.
Can I just leave the spiders alone?
Recluses and widows are different. Around Florence, it's worth knowing which you have. Most house spiders are harmless and eat other pests.
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.
What attracts spiders to a house?
Spiders follow insects to porch lights, damp spots and clutter. Cut the insects and spiders follow. Food, mostly.
Do spider sprays actually work?
They rarely reach hiding spots. Removing webs and egg sacs and sealing gaps works better. Store-bought sprays kill what they touch.
How much does spider extermination cost?
Across Florence, for homeowners the range is a benchmark, and the technician's inspection sets the actual price. Ask each company quoting in Florence what they usually find in your part of town. Across Florence, catching a spider problem early keeps it in the cheapest bracket, as Local quotes vary; ask for a written estimate.
Why do spider bites often turn out to be infections?
Across Florence, in Suchard's study of 182 suspected spider-bite patients at a single California emergency department from January 2006 to November 2007, published in 2011, 85.7% received an infection diagnosis. A good pro in Florence can explain why their plan matches what they found at your place.
Are there dangerous spiders in Florence?
Black widows, yes, as almost everywhere. Most other spiders here are harmless.
When are spiders worst in Florence?
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