OH · Allergy Season Guide
Ohio Allergy Season Guide
Ohio experiences a humid continental climate with hot, humid summers and cold, snowy winters.
Summary
Ohio has 0 active PollyMap collection sites, and is seeking partners in 5 additional cities. Tree pollen typically dominates early spring, grass pollen peaks in late spring and early summer, and weed pollen (including ragweed) extends from late summer through fall.
PollyMap collection status across Ohio
Statewide allergy overview
Ohio experiences a humid continental climate with hot, humid summers and cold, snowy winters.
Maple, birch, oak, and ash drive the spring tree season. Grass pollen peaks in late May and June, and ragweed dominates from mid-August through the first hard frost.
Heavy leaf litter, agricultural activity, and humid summers produce very high outdoor mold counts from late summer through fall.
Allergy patterns vary by elevation and proximity to coast or mountains within Ohio, but most of the state shares a common seasonal rhythm of spring tree pollen, summer grass pollen, and late-summer to fall weed pollen.
Ohio allergy calendar
Month-by-month intensity for the four major airborne allergen categories.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | Low | Mod | High | V.High | V.High | High | Mod | Low | Low | Low | Low | Low |
| Grass | — | — | Low | Mod | High | V.High | High | Mod | Low | Low | — | — |
| Weed | Low | Low | Low | Mod | Mod | Mod | High | V.High | V.High | High | Mod | Low |
| Mold | Low | Low | Mod | Mod | High | High | V.High | V.High | V.High | High | Mod | Low |
Top weed pollens
Top airborne molds
Major city guides in Ohio
OH
Columbus
View Columbus allergy season guide →
OH
Cleveland
View Cleveland allergy season guide →
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Cincinnati
View Cincinnati allergy season guide →
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Toledo
View Toledo allergy season guide →
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Akron
View Akron allergy season guide →
Latest PollyMap reports for Ohio
Partner Program
Become a PollyMap Collection Partner in Ohio
We work with allergy clinics, naturopathic clinics, universities, and qualified environmental health professionals to build the most reliable, locally-collected pollen network in America.
Partner benefits
- Dedicated local partner profile on PollyMap
- Local exposure to thousands of allergy searchers
- Backlinks from your city and state guide pages
- Lead generation from local allergy patients
- Featured on every local PollyMap report
- Recognition as a pollen data collection center
- Collaboration on local pollen research and reports
Partner requirements
- Receive a PollyKit weekly by mail
- Hang the PollyKit collector for 24–48 hours
- Mail the sample back weekly using prepaid packaging
- Maintain a consistent collection schedule year-round
Test the air at your address
Curious what's actually in the air at your Ohio home or office?
The PollyKit is the easiest air-sampling kit on the market — collect outdoor pollen and airborne mold indoors at your home, office, classroom or rental, then mail it in for a full lab report. Just $39.99.
- Outdoor pollen counts
- Indoor airborne mold
- Lab-analyzed results
- Ships nationwide
What's in the box
- Air sampling rodsx2
- Indoor mold slidex1
- Prepaid lab returnincluded
- Personal results report3–5 days
The only consumer kit that pairs outdoor pollen with indoor airborne mold sampling.
Frequently asked questions
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