OH pollen report
Dayton Pollen Report
Dayton sits in the Great Miami River valley in the heart of Ohio's farm country — and it consistently ranks among the Midwest's tougher allergy cities. Oak and maple bury the city each spring, grasses carry the summer, and ragweed fills the region's field edges every fall until the first frost.
Collection coming soon to Dayton
PollyMap is actively recruiting a verified local partner in Dayton. Be the first to know — or apply to be the partner.
What drives allergies in Dayton
Trees: oak, maple, and ash (April – June)
Oak (Quercus) and maple dominate the Miami Valley canopy. May is the peak.
Grasses: bluegrass and Timothy (May – August)
Lawn and farm grasses across southwest Ohio pollinate heavily in June.
Weeds: ragweed (August – frost)
Ragweed (Ambrosia) thrives in Ohio's farmland, with counts elevated until the first frost.
Mold: river valley humidity
The Great Miami corridor's humidity keeps Alternaria and Cladosporium active from summer into the harvest season.
Historical reports
Cities near Dayton
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Dayton today?
PollyMap publishes real, microscope-verified pollen counts for Dayton — 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 Dayton right now?
Dayton's worst stretches are May (oak, maple), June (grasses), and September (ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Dayton?
April through the first hard frost: trees in late spring, grasses in summer, ragweed in the fall, and mold through the humid months.
Why do allergies spike in Dayton in September?
Ragweed peaks in late summer across southwest Ohio's farm country, overlapping with harvest dust and mold from falling leaves.
Are you an allergy clinic in Dayton? 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 Dayton, 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 Dayton metro — like a franchise territory. Dayton has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Dayton 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.
Dayton, Kettering, Beavercreek, and Centerville each make natural PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Dayton 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 Dayton