Ohio Allergy Season: Peak, Timing, and Symptoms

Written by Jennifer Gaeng
Published: February 15, 2023
© iStock.com/Sean Pavone
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Ohio is similar to other states when it comes to seasonal allergies. Even though Ohio’s winters are milder than those in many other states, allergens found inside homes can still be problematic. The rest of the year, Ohio is a major source of pollen. Therefore, residents may experience undesirable and difficult-to-treat side effects.

The vast majority of people who suffer from seasonal allergies blame pollen. These allergies only occur during certain times of the year since plants only produce pollen during those times. Ohio’s primary pollen producers include grasses, trees, and weeds.

When is Allergy Season in Ohio?

Ohio wooden sign with agriculture landscape on background
Ohio has many common allergy triggers including trees and grasses.


It depends on the allergen(s) you are sensitive to, but allergy symptoms can occur at any time of year in Ohio. Pollen allergies are most common in the spring, summer, and fall, but reactions to indoor allergens can occur at any time of year.

Due to its cold winters, Ohio normally experiences the onset of its seasonal allergy season around the month of February. Ohio typically has lower levels of spring tree pollen than the majority of other states. Ohio often experiences allergy season from February to late September. However, if you suffer from indoor allergens such as dust, pet dander, or mold, you may discover that your symptoms worsen during the winter months because you spend more time inside.

When is Peak Allergy Season in Ohio?

Ohio has the highest pollen counts in April, June, and September. Staying indoors or delaying outside activities until later in the day will help you avoid inhaling as much pollen during the peak pollen months. You can adjust your plans as needed by checking the local pollen count daily. The winters in Ohio are typically very chilly. This has led to fewer reported incidences of seasonal allergies in the area. Many persons with allergies still need to be careful of indoor allergens, even if seasonal allergens may be less of a concern in Ohio during the winter months. 

Which Plants Cause Allergies in Ohio?

Due to Ohio’s location between the Northeast Mixed Forest and the Midwest Mississippi Valley, some residents experience severe allergic reactions. We have compiled the most typical data for allergy season in Ohio, but it’s important to remember that allergens and allergy seasons differ based on where you live.

Some of the most frequent allergy symptoms experienced by Ohio residents are listed here:

  • Ryegrass
  • Kentucky Bluegrass
  • Orchard Grass
  • Ragweed
  • Russian Thistle
  • Marsh Elder
  • Sorrel
  • Pigweed
  • Sorrel.

Common Allergy Symptoms

Symptoms of allergies include a runny nose, sneezing, itchy eyes, and congestion.


The following allergy symptoms are common in the State of Ohio:

  • Drippy nose
  • Coughing
  • Congestion
  • Sneezing
  • Headaches
  • Sore throat
  • Irritated, teary eyes
  • Hives
  • An increase in asthma symptoms

Allergies typically cause at least one of these symptoms, however, the specific manifestations may differ from person to person.

What Are Some of the Best Allergy Treatments?

Reducing exposure is one of the simplest ways to deal with allergies. You can alleviate your allergy symptoms by avoiding your allergen. The problem is that there is so much airborne pollen that it is difficult to avoid breathing it. By implementing reasonable safety measures, you can still reduce your exposure to triggers.

Ensure there aren’t too many pollens about. Stay indoors if the pollen forecast calls for it.

Put up the shutters or close the windows. When allergies are present, it’s best to keep the windows shut and the air conditioner on. This helps to keep pollen out of the body.

Wear a mask. Putting on a mask before going outside helps protect your lungs from inhaling pollen.

Spend less time outdoors. Those who suffer from severe allergies should spend as little time outside as possible when pollen counts are high. It would be a shame to deprive oneself of the pleasures nature provides, though. Keep in mind that the pollen level is typically lowest in the evening.

High-Efficiency Particle Air Filters should be installed (HEPA). A HEPA filter installed in your air conditioner will significantly reduce pollen levels.

Take baths on a regular basis. Take a lengthy, hot shower as soon as you get back inside to wash off any pollen you may have picked up while outside.

Spend some time cleaning the house. Use a vacuum with a HEPA filter, dust with a damp towel, and increase your frequency of laundry loads when allergy season arrives.

Remove your shoes before entering the home.  Remove your shoes at the door to keep pollen from spreading through the house.

Allergy Medications

While avoiding your symptoms’ triggers is a smart starting step, you may still require additional treatment. When that’s done, you can try out some over-the-counter allergy relief. Common short-term treatments include antihistamines, eye drops, decongestants, and nasal sprays. The medical community also endorses other options.

Talk To Your Doctor

Your primary care physician may recommend seeing an allergist or immunologist for treatment, or they may prescribe medication to help manage your symptoms in the meanwhile. Sublingual immunotherapy and allergy injections may help sensitive people who have severe seasonal allergies.

Learn more about allergy seasons in every state in the USA!

Up Next:

Mississippi Allergy Season: Peak, Timing, and Symptoms
Wyoming Allergy Season: Peak, Timing, and Symptoms
Indiana Allergy Season: Peak, Timing, and Symptoms

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Cleveland, Ohio, USA downtown skyline on the Cuyahoga River at dusk.
Cleveland, Ohio, USA downtown skyline on the Cuyahoga River at dusk.
© iStock.com/Sean Pavone

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About the Author

A substantial part of my life has been spent as a writer and artist, with great respect to observing nature with an analytical and metaphysical eye. Upon close investigation, the natural world exposes truths far beyond the obvious. For me, the source of all that we are is embodied in our planet; and the process of writing and creating art around this topic is an attempt to communicate its wonders.

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