OH pollen report
Cincinnati Pollen Report
Cincinnati's bowl-like Ohio Valley geography traps pollen and humidity, giving the metro one of the tougher allergy climates in the Midwest. Oak and hickory hammer the hillsides in spring, grasses run through humid summers, and ragweed counts are heavy from August to frost. The valley's muggy air keeps mold spores active through every warm stretch.
Collection coming soon to Cincinnati
PollyMap is actively recruiting a verified local partner in Cincinnati. 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 Cincinnati
No allergy clinic is reporting from Cincinnati 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 Cincinnati
Trees: oak, hickory, and maple (March – May)
Oaks (Quercus) dominate the wooded hillsides that ring the metro, with hickory, maple, and ash contributing. April is the typical peak.
Grasses: fescue and bluegrass (May – July)
Lawn grasses pollinate heavily in June, with Ohio Valley humidity making the season feel worse.
Weeds: ragweed (August – frost)
Ragweed (Ambrosia) fills the region's field edges and riverbanks. Fall counts are reliably high until a hard frost, and the valley's still air lets pollen accumulate.
Mold: the valley's humid constant
Cincinnati's muggy summers and damp falls keep Alternaria and Cladosporium active for months, with spikes after storms.
Pollen patterns in Cincinnati
In Cincinnati, 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
Cincinnati 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 Cincinnati
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Cincinnati today?
PollyMap publishes real, microscope-verified pollen counts for Cincinnati — 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 Cincinnati right now?
Cincinnati's worst stretches are April (oak) and September (ragweed), with grass and mold heavy through humid summers. The measured reports on this page show today's actual levels.
When is allergy season in Cincinnati?
March through the first hard frost: trees in spring, grasses in early summer, ragweed from August onward, and mold through the humid months.
Why does Cincinnati's geography make allergies worse?
The metro sits in a river valley bowl ringed by wooded hills — pollen and humid air settle in and linger, while the hills themselves are dense with oak and hickory.
Are you an allergy clinic in Cincinnati? 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 Cincinnati, 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 Cincinnati metro — like a franchise territory. Cincinnati has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Cincinnati 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.
Cincinnati spans Ohio, Kentucky, and Indiana — plenty of PollyMap territories from Hyde Park to Northern Kentucky and West Chester. First clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Cincinnati 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 Cincinnati
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