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
Baraboo — 95 SEVERE View →
Milwaukee — 85 SEVERE View →
Kenosha — 85 SEVERE View →
Racine — 85 SEVERE View →
Waukesha — 85 SEVERE View →
Janesville — 85 SEVERE View →
Brookfield — 85 SEVERE View →
New Berlin — 85 SEVERE View →
Menomonee Falls — 85 SEVERE View →
Franklin — 85 SEVERE View →
Oak Creek — 85 SEVERE View →
Muskego — 85 SEVERE View →
Mequon — 85 SEVERE View →
Germantown — 85 SEVERE View →
West Allis — 85 SEVERE View →
Mukwonago — 85 SEVERE View →
Oconomowoc — 85 SEVERE View →
Delafield — 85 SEVERE View →
Hartland — 85 SEVERE View →
Pewaukee — 85 SEVERE View →
Whitefish Bay — 85 SEVERE View →
Fox Point — 85 SEVERE View →
River Hills — 85 SEVERE View →
Merton — 85 SEVERE View →
Cedarburg — 85 SEVERE View →
Grafton — 85 SEVERE View →
Sussex — 85 SEVERE View →
Elm Grove — 85 SEVERE View →
Caledonia — 85 SEVERE View →
Mount Pleasant — 85 SEVERE View →
Pleasant Prairie — 85 SEVERE View →
Lake Geneva — 85 SEVERE View →
Watertown — 85 SEVERE View →
Fort Atkinson — 85 SEVERE View →
Hudson — 85 SEVERE View →
Appleton — 80 SEVERE View →
Stoughton — 80 SEVERE View →
Beloit — 80 SEVERE View →
Eau Claire — 73 HIGH View →
La Crosse — 73 HIGH View →
Wausau — 73 HIGH View →
New Richmond — 73 HIGH View →
Marshfield — 73 HIGH View →
Sheboygan — 72 HIGH View →
Fitchburg — 72 HIGH View →
Middleton — 72 HIGH View →
Verona — 72 HIGH View →
DeForest — 72 HIGH View →
Oregon — 72 HIGH View →
Green Bay — 68 HIGH View →
Neenah — 68 HIGH View →
Kaukauna — 68 HIGH View →
Madison — 67 HIGH View →
Sun Prairie — 67 HIGH View →
Waunakee — 67 HIGH View →
Cottage Grove — 67 HIGH View →
Oshkosh — 60 HIGH View →
Menasha — 60 HIGH View →
Altoona — 53 MODERATE 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