WI pollen report
Milwaukee Pollen Report
Milwaukee packs a full Midwest allergy season into its warm months, shaped by Lake Michigan's shore. Birch and oak drive an intense late spring, grasses and ragweed carry the summer, and lake-effect humidity keeps mold spores active well into fall. The lake can delay the season's start — but not its strength.
Collection coming soon to Milwaukee
PollyMap is actively recruiting a verified local partner in Milwaukee. Be the first to know — or apply to be the partner.
While we find a local clinic
Test the air at your own home in Milwaukee
No allergy clinic is reporting from Milwaukee yet. Until one does, you can order your own PollyKit — a simple air sampler you hang outdoors or indoors. Send it back and the PollyKit Lab shows you exactly what's floating in your air.
- Pollen from local trees, grasses and weeds
- Airborne mold spores
- Dust mites and other indoor allergens
Hang it outdoors
See which pollen and mold are in your yard this season.
Or hang it indoors
Check bedrooms and living spaces for mold, dust mites and more.
What drives allergies in Milwaukee
Trees: birch, oak, and maple (April – June)
Birch (Betula) is one of Wisconsin's most potent allergens, joined by oak and maple. The season starts late but peaks hard in May.
Grasses: June – July
Timothy and lawn grasses pollinate heavily in early summer across the metro and surrounding farm country.
Weeds: ragweed (August – frost)
Ragweed (Ambrosia) is Wisconsin's signature fall allergen, thriving in the region's fields and disturbed lots until the first hard frost.
Mold: lake humidity and fall leaves
Lake Michigan humidity keeps Alternaria and Cladosporium active through summer, with spikes as leaves drop in October.
Pollen patterns in Milwaukee
In Milwaukee, tree pollen — including Maple, Oak, Birch — typically dominates from late winter through spring. Bluegrass grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Top trees
- Maple
- Oak
- Birch
- Ash
- Walnut
Top grasses
- Bluegrass
- Timothy
- Orchard
- Rye
Top weeds
- Ragweed
- Lamb's quarters
- Pigweed
- Plantain
Top molds
- Alternaria
- Cladosporium
- Aspergillus
- Penicillium
Milwaukee pollen calendar
Typical monthly intensity across the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tree | ||||||||||||
| grass | ||||||||||||
| weed | ||||||||||||
| mold |
Historical reports
Cities near Milwaukee
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Milwaukee today?
PollyMap publishes real, microscope-verified pollen counts for Milwaukee — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in Milwaukee right now?
Milwaukee's worst stretches are May (birch, oak), June–July (grasses), and August–September (ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Milwaukee?
April through the first hard frost: trees in late spring, grasses in summer, ragweed from August until frost, and mold through the humid months.
Does Lake Michigan affect Milwaukee's pollen?
Yes — the lake delays spring near the shore, lake breezes can shift counts between shoreline and inland neighborhoods, and its humidity sustains mold.
Are you an allergy clinic in Milwaukee? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of Milwaukee, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the Milwaukee metro — like a franchise territory. Milwaukee has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Milwaukee yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
Milwaukee, Waukesha, Brookfield, and the North Shore suburbs each make PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Milwaukee pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of Milwaukee
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