Spiders in Wisconsin

Weather-driven spiders risk forecasts for Wisconsin cities and counties.

Spider sightings in Wisconsin homes peak in fall when males wander seeking mates, and during damp conditions that increase insect prey. Our spider forecasts identify weather conditions driving indoor spider encounters.

Seasonal Pattern

Spiders are active in Wisconsin from spring through fall, with indoor sightings peaking September through November. Wolf spiders, common house spiders, and occasional brown recluse sightings are reported statewide. Males actively seek mates in autumn, increasing indoor encounters.

Weather Influence

Spider activity is linked to temperature (50-80°F activity range), humidity, and rainfall. Moist conditions attract the insects spiders feed on, increasing spider populations near homes. Cooling fall temperatures push spiders indoors seeking warmth. Low wind favors web construction.

Current Spiders Risk by Location

Location County Score Risk Level
La Crosse — 75 HIGH View →
Brookfield — 73 HIGH View →
Oak Creek — 73 HIGH View →
Muskego — 73 HIGH View →
Mequon — 73 HIGH View →
Germantown — 73 HIGH View →
West Allis — 73 HIGH View →
Sun Prairie — 73 HIGH View →
Middleton — 73 HIGH View →
Mukwonago — 73 HIGH View →
Oconomowoc — 73 HIGH View →
Delafield — 73 HIGH View →
Hartland — 73 HIGH View →
Pewaukee — 73 HIGH View →
Whitefish Bay — 73 HIGH View →
Fox Point — 73 HIGH View →
Merton — 73 HIGH View →
Cedarburg — 73 HIGH View →
Elm Grove — 73 HIGH View →
Stoughton — 73 HIGH View →
Watertown — 73 HIGH View →
Fort Atkinson — 73 HIGH View →
Eau Claire — 68 HIGH View →
Fitchburg — 68 HIGH View →
Milwaukee — 65 HIGH View →
Kenosha — 65 HIGH View →
Racine — 65 HIGH View →
Waukesha — 65 HIGH View →
Janesville — 65 HIGH View →
Sheboygan — 65 HIGH View →
Madison — 63 HIGH View →
Altoona — 63 HIGH View →
Oshkosh — 60 HIGH View →
Menomonee Falls — 60 HIGH View →
Neenah — 60 HIGH View →
Menasha — 60 HIGH View →
Kaukauna — 60 HIGH View →
Lake Geneva — 60 HIGH View →
Beloit — 60 HIGH View →
Cottage Grove — 58 MODERATE View →
Appleton — 55 MODERATE View →
River Hills — 50 MODERATE View →
Marshfield — 50 MODERATE View →
New Berlin — 45 MODERATE View →
Franklin — 45 MODERATE View →
Verona — 45 MODERATE View →
Waunakee — 45 MODERATE View →
Grafton — 45 MODERATE View →
Sussex — 45 MODERATE View →
Caledonia — 45 MODERATE View →
Mount Pleasant — 45 MODERATE View →
Pleasant Prairie — 45 MODERATE View →
DeForest — 45 MODERATE View →
Oregon — 45 MODERATE View →
Hudson — 45 MODERATE View →
Wausau — 43 MODERATE View →
Baraboo — 30 MODERATE View →
New Richmond — 28 LOW View →
Green Bay — 10 LOW View →

How We Calculate Risk Scores

Our scoring engine analyzes real-time weather data including temperature, humidity, rainfall, soil conditions, and wind. Each pest has a unique model calibrated to its behavioral patterns. Scores update every 3 hours. Learn more about our methodology

Spiders FAQ

What is the spiders risk in Wisconsin right now?
Spider risk varies by location based on current weather conditions. Use the table below to see scores for specific cities. Risk levels range from Low (0-29) to Severe (80-100).
Spiders are active in Wisconsin from spring through fall, with indoor sightings peaking September through November. Wolf spiders, common house spiders, and occasional brown recluse sightings are reported statewide. Males actively seek mates in autumn, increasing indoor encounters.
Spider activity is linked to temperature (50-80°F activity range), humidity, and rainfall. Moist conditions attract the insects spiders feed on, increasing spider populations near homes. Cooling fall temperatures push spiders indoors seeking warmth. Low wind favors web construction.

Spiders a Problem?

Connect with a Wisconsin pest specialist who can inspect and treat your property.

(217) 993-8391