OH pollen report
Cleveland Pollen Report
Cleveland's Lake Erie shoreline shapes its allergy seasons: lake-effect humidity feeds mold, the metro's mature oak and maple canopy drives a strong spring, and ragweed fills the region's fields and vacant lots every fall. The lake can temper the start of spring, but once the season arrives, it runs full strength through the first frost.
Collection coming soon to Cleveland
PollyMap is actively recruiting a verified local partner in Cleveland. 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 Cleveland
No allergy clinic is reporting from Cleveland 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 Cleveland
Trees: oak, maple, and birch (April – June)
Oaks (Quercus), maples, and birch dominate the metro's canopy. The lake can delay bud-out slightly near the shore, but May is reliably the peak.
Grasses: Timothy and bluegrass (June – July)
Lawn and meadow grasses pollinate heavily in early summer across the metro and the surrounding farm country.
Weeds: ragweed (August – frost)
Ragweed (Ambrosia) is Northeast Ohio's signature fall allergen, thriving in the region's abundant disturbed soil. Counts stay high until a hard frost.
Mold: lake-fed humidity
Lake Erie humidity keeps Alternaria and Cladosporium active from late spring through fall, with spikes after storms and during damp autumns.
Pollen patterns in Cleveland
In Cleveland, 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
Cleveland 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 Cleveland
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Cleveland today?
PollyMap publishes real, microscope-verified pollen counts for Cleveland — 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 Cleveland right now?
Cleveland's worst stretches are May (trees), June (grasses), and September (ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Cleveland?
April through the first hard frost: trees in spring, grasses in early summer, ragweed from August onward, and mold through the humid months.
Does Lake Erie affect Cleveland's pollen?
Yes — lake breezes can hold pollen down near the shore while suburbs spike, and lake-fed humidity sustains mold. Real local measurements matter more than regional forecasts here.
Are you an allergy clinic in Cleveland? 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 Cleveland, 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 Cleveland metro — like a franchise territory. Cleveland has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Cleveland 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.
Cleveland's east and west suburbs — Lakewood, Parma, Shaker Heights, Mentor — each make PollyMap territories. First clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Cleveland 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 Cleveland
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