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
Brookfield — 85 SEVERE View →
Oak Creek — 85 SEVERE View →
Muskego — 85 SEVERE View →
West Allis — 85 SEVERE View →
River Hills — 85 SEVERE View →
Cedarburg — 85 SEVERE View →
Elm Grove — 85 SEVERE View →
Milwaukee — 77 HIGH View →
Kenosha — 77 HIGH View →
New Berlin — 77 HIGH View →
Menomonee Falls — 77 HIGH View →
Franklin — 77 HIGH View →
Mequon — 77 HIGH View →
Germantown — 77 HIGH View →
Whitefish Bay — 77 HIGH View →
Fox Point — 77 HIGH View →
Pleasant Prairie — 77 HIGH View →
Sussex — 75 HIGH View →
Caledonia — 75 HIGH View →
Mount Pleasant — 75 HIGH View →
Racine — 67 HIGH View →
Sheboygan — 67 HIGH View →
Grafton — 67 HIGH View →
Waukesha — 55 MODERATE View →
Janesville — 55 MODERATE View →
Sun Prairie — 55 MODERATE View →
Middleton — 55 MODERATE View →
Menasha — 55 MODERATE View →
Oconomowoc — 55 MODERATE View →
Delafield — 55 MODERATE View →
Hartland — 55 MODERATE View →
Pewaukee — 55 MODERATE View →
Merton — 55 MODERATE View →
Cottage Grove — 55 MODERATE View →
Watertown — 55 MODERATE View →
Madison — 50 MODERATE View →
Green Bay — 30 MODERATE View →
Appleton — 30 MODERATE View →
La Crosse — 30 MODERATE View →
Fitchburg — 30 MODERATE View →
Verona — 30 MODERATE View →
Waunakee — 30 MODERATE View →
Neenah — 30 MODERATE View →
Kaukauna — 30 MODERATE View →
Mukwonago — 30 MODERATE View →
DeForest — 30 MODERATE View →
Stoughton — 30 MODERATE View →
Oregon — 30 MODERATE View →
Lake Geneva — 30 MODERATE View →
Fort Atkinson — 30 MODERATE View →
Beloit — 30 MODERATE View →
Baraboo — 30 MODERATE View →
Oshkosh — 22 LOW View →
Eau Claire — 22 LOW View →
Altoona — 22 LOW View →
Marshfield — 22 LOW View →
Wausau — 18 LOW View →
New Richmond — 17 LOW View →
Hudson — 17 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