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Overview
At 31.6 inches of yearly rain and an average of 45.7 F, Green Bay experiences a mix of wet spells experiences and dry breaks.
Wisconsin climate patterns, from seasonal storms to humidity shifts, interact with local conditions to influence indoor mold risk.
Green Bay has long winters with significant snowfall and warm summers, so moisture risks shift through the year.
Property Maintenance standards cover exterior upkeep and code compliance.
This guide highlights local moisture drivers, seasonal risk, and prevention steps. For legal rights and landlord obligations, review the Wisconsin mold laws guide.
Sources: [Wisconsin - Climate | Britannica] | [Green Bay Property Maintenance] | [NOAA Climate Normals - GREEN BAY, WI US]
Action Checklist
Green Bay Home Inspection Checklist
Common construction types in Green Bay affect where moisture problems develop. Here is how local building patterns shape what to inspect.
In Green Bay, property Maintenance standards outline exterior upkeep requirements and compliance expectations.
Code enforcement addresses property maintenance violations and public nuisances.
Sources: [Green Bay Property Maintenance]
- With about 31.6 inches of annual rainfall, Green Bay homes benefit from routine gutter cleaning and roof drainage checks.
- Roof flashing, gutters, and downspout extensions.
- Attic insulation and ventilation near eaves.
- Basement walls, sump pits, and floor drains.
- Window frames and sills with condensation.
- Plumbing lines in exterior walls that can freeze and leak.
- Bathroom exhaust fans and vent ducts.
- HVAC condensate lines and drip pans.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - GREEN BAY, WI US]
Warning Signs of Mold in Green Bay
Watch for these signs that moisture is lingering in Green Bay homes and rentals:
- Window condensation that persists during warm weather in Green Bay (average temperature 45.7 F) often signals excess indoor humidity.
- Condensation that returns on windows each morning.
- Musty odors after snowmelt or heavy rain.
- Peeling paint near baseboards or window trim.
- Dark spotting near ceiling corners.
- Soft drywall around tubs or showers.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - GREEN BAY, WI US]
Mold Risk Factors in Green Bay
These are the most common moisture drivers for homes and rentals in Green Bay:
- Annual precipitation near 31.6 inches means Green Bay storm events and small leaks both matter.
- Bay and lake moisture keep exterior surfaces damp in spring.
- Snow and ice can create roof leaks and ice dams.
- Freeze-thaw cycles stress roof flashing and exterior joints.
- Spring snowmelt can keep basements damp.
- Humid summers raise indoor moisture without dehumidification.
Sources: [Wisconsin - Climate | Britannica] | [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - GREEN BAY, WI US]
Green Bay Seasonal Risk Calendar
Winter
Extended heating with an average of 45.7 F creates condensation risk on cold windows and walls. Maintain steady ventilation.
Spring
Thaw and rain keep basements damp. Check drainage.
Summer
Cool summers still bring rain. Inspect roof edges after storms.
Fall
Temperature swings return. Watch for attic condensation.
Sources: [Wisconsin - Climate | Britannica] | [NOAA Climate Normals - GREEN BAY, WI US]
Green Bay Moisture Playbook
Use this short playbook to stay ahead of common moisture problems in Green Bay.
After a Leak
Stop the leak, remove wet materials within 24 to 48 hours, and dry the area with airflow.
Monthly Maintenance
Inspect basements, clear condensate lines, and log indoor humidity.
Seasonal Tune Up
Before storm season, clear gutters and inspect flashing; about 31.6 inches of annual precipitation means small leaks can add up.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - GREEN BAY, WI US]
Mold Prevention in Green Bay
Use these priorities to keep indoor humidity low and avoid recurring growth:
- Keep gutters clear and downspouts extended to manage the 31.6 inches of precipitation this area receives each year.
- Maintain indoor humidity between 30 and 50 percent.
- Dry wet materials within 24 to 48 hours.
- Vent bathrooms and kitchens outdoors.
- Clear gutters and direct downspouts away from foundations.
- Inspect roof flashing and window seals before winter.
- Service HVAC condensate drains annually.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - GREEN BAY, WI US]
State Laws and Rights
Wisconsin mold law snapshot
Wisconsin does not have a mold-specific statute, but habitability rules still apply.
Wisconsin law establishes an implied warranty of habitability through Wis. Stat. 704.07, which applies to all residential tenancies and cannot be waived by lease agreement. Under this statute, landlords must: (1) keep portions of the premises under their control in reasonable repair, (2) maintain equipment necessary to supply services like heat, water, and air conditioning, (3) make all necessary structural repairs, (4) repair or replace plumbing, electrical wiring, machinery, and equipment furnished by the landlord, and (5) comply with local housing codes. If mold develops due to a landlord's failure to address moisture intrusion, leaks, or other maintenance issues, it may constitute a violation of this habitability standard.
Use the full Wisconsin guide for tenant rights, landlord responsibilities, and remedies.