Toledo Allergies: Why Toledo Ranks 17th and What Triggers It

Toledo allergies are rougher than those in most large U.S. metros, at least by one national ranking. The Asthma and Allergy Foundation of America (AAFA) ranked the Toledo metro area 17th of the 100 largest U.S. metros in its 2026 Allergy Capitals report, the highest of any Ohio metro. Toledo's pollen scored only average. What pushed its score higher was heavy use of allergy medicine and a relatively small number of allergists, both rated worse than average.

The pollen year itself follows a familiar order: tree pollen in early spring, grass in late spring and early summer, and ragweed from August until the first hard freeze. Allergy medicine handles the symptoms while you take it. Immunotherapy, including the short ILIT course, treats the allergy itself. More on that below.

How the AAFA ranks Toledo

The AAFA scores the 100 most populated metro areas in the lower 48 states on tree, grass and weed pollen, over the counter allergy medicine use, and the number of board certified allergists. The factors aren't weighted equally. Pollen scores count how many days in 2025 a metro's automated sensors recorded "high" or "very high" levels. Each factor then gets a marker of worse than average, average or better than average, set at half a standard deviation from the average.

Here's how Toledo's ratings in each category changed between the last two reports:

Sources: AAFA 2025 and 2026 Allergy Capitals reports.

The pollen marker is the one that moved. The AAFA bases each year's ranking on the previous year's pollen, so the 2026 report reflects the 2025 season. The other two markers stayed put. Medicine use is measured as over the counter sinus and allergy medicine sales per 10,000 allergy patients, and specialists as board certified allergists per patient population. In plain terms, the AAFA's data suggest Toledo area allergy sufferers buy more over the counter medicine than average, and have fewer allergists to go around.

Other Ohio metros ranked much lower in 2026: Akron 57th, Cleveland 65th, Dayton 72nd, Cincinnati 73rd and Columbus 79th. Keep the list in perspective, though. The AAFA itself notes that you could live in its 100th city and still have significant allergies. What matters for you is which pollen you react to.

Toledo allergy season at a glance

Sources: season order from MetroHealth (Northeast Ohio), plant lists and timing from the AAFA and AAAAI (grass, ragweed), mold from Ohio State Wexner Medical Center.

Tell your allergist when your worst allergy symptoms occur to help identify possible culprits.

Spring: tree pollen and the Oak Openings

Trees release the first pollen of the year, so they're behind most early spring sneezing. Across the U.S., the AAFA says trees produce the most pollen from February through April, with each species peaking at its own time. Closer to home, MetroHealth's allergy division director says tree pollen shows up in early spring in the Cleveland area.

Oak, maple, birch, elm and ash are all on the AAFA's list of the trees that cause the most allergy symptoms, along with cottonwood, hickory and walnut. Oak has a long history around Toledo. In the Oak Openings Region, a sandy stretch of western Lucas County, early settlers found oaks among prairie grasses, with the trees spaced so far apart they could drive a wagon through the woods, according to Metroparks Toledo. Metroparks Toledo has described the region as home to more rare and endangered species than anywhere else in Ohio.

If you're watching yellow dust pile up on your car, that's probably not what's making you sneeze. The AAFA explains that visible pollen is heavy and falls near the tree. The pollen behind most symptoms is too small to see and rides the wind into your eyes and nose.

Tree pollen can bother your mouth, too. According to the AAFA, people with a birch pollen allergy may get an itchy or tingling mouth from raw apples, cherries, peaches and pears, a reaction called oral allergy syndrome. Our oral allergy syndrome guide has the full food list.

Late spring and summer: grass pollen

Grass pollen follows the trees. The AAAAI says grass usually pollinates from April through early June in most of the U.S., and MetroHealth places the start of grass season in late spring for the Cleveland area. Common northern grasses include Timothy, Kentucky blue, rye and fescue.

Skipping the mowing won't fully protect you. Grass pollen is light and carried by the wind, the AAFA says, so pollen from grass in other places can still reach you. Grass season can sometimes overlap with tree season too, so late spring can bring both allergens at once.

Fall: ragweed until the first freeze

Ragweed is the big fall trigger. The AAFA calls it the worst offender among weed pollens, says about 1 in 7 people are allergic to it, and reports that ragweed populations are expanding and run especially high in Midwestern and Eastern states. One plant can produce billions of pollen grains that travel hundreds of miles.

The AAFA puts the start around August, with a peak in mid September in most areas. The AAAAI says that in many parts of the country, symptoms now begin in early August and last through October, a longer stretch than the mid August through September window of the past. Either way, relief usually comes with the first hard freeze, and the AAFA notes that as the years get warmer, the first frost is coming later. The AAFA also lists lamb's-quarters, pigweed and cocklebur among the fall weeds. Our ragweed allergy guide covers symptoms and treatment in more depth.

Mold

Mold doesn't count in the Allergy Capitals rankings, but it can make pollen season feel worse. The AAFA says airborne mold spores climb before, during and after storms, and Ohio State Wexner Medical Center notes that counts tend to rise in rainy, damp or foggy weather. Indoors, the AAFA suggests keeping humidity between 30% and 50%, checked with a hygrometer, and running a dehumidifier if needed. Outside, it recommends clearing leaves and piles of dead plants as soon as you can.

How to cut your pollen exposure in Toledo

You can't keep pollen out of the air, but you can keep a lot of it out of your home. These steps come from the AAFA's 2026 report.

1. Check the pollen count. A count is measured from air samples, while a forecast is a prediction, so a count is more accurate. On high days, stay inside when you can, and wear sunglasses and a hat when you can't.

2. Keep windows closed. That goes for the house and the car during your pollen season. Use central air or an air cleaner with a HEPA filter if you have one.

3. Leave pollen at the door. Take off your shoes when you come in, and change and wash your clothes after time outdoors. Dry laundry in the dryer or on an indoor rack, not on a line.

4. Shower before bed. It rinses pollen off your skin and hair so it doesn't end up on your pillow.

5. Rinse your nose. A saline rinse clears pollen and mucus. If you mix your own solution, use distilled or boiled water.

6. Start medicine early. The AAFA suggests starting allergy medicine a couple of weeks before your season begins. Nasal steroid sprays are the most effective type for nose symptoms, and many are sold over the counter.

Allergy testing in Toledo

Oak, grass, ragweed and mold can all cause the same sneezing and itchy eyes, so symptoms alone may not tell you which one is to blame. The AAFA recommends having your allergies evaluated by an allergist. A skin test or blood test can help pin down the trigger, and that matters if you're considering immunotherapy, which is matched to your specific allergens. Our guide to allergy skin tests vs. blood tests explains the difference. If you're not sure you have allergies at all, Allergies or a Cold? walks through the signs.

Longer term options for Toledo allergies

Allergy medicine controls symptoms while you take it, but it doesn't change the allergy. The AAFA suggests talking with an allergist about immunotherapy if medicine doesn't give you complete relief. The AAFA says immunotherapy can change the body's immune response to allergens. Here are the forms to ask about.

Allergy shots (SCIT) follow the longest schedule. The AAAAI describes shots once or twice a week for four to six months during build-up, then every two to four weeks for three to five years. Our guide to allergy shots explains the schedule.

Allergy tablets and drops (SLIT) go under the tongue. The AAAAI says grass tablets are taken daily at home after the first doses in the allergist's office. Tablets are approved in the U.S. for grass, and the AAAAI lists them as an option for ragweed too. Our comparison of allergy shots, allergy drops and ILIT covers which allergens each one treats.

ILIT (intralymphatic immunotherapy) is the shortest course, and for some people a faster alternative to allergy shots. An allergist uses ultrasound to inject FDA approved allergen extract into a lymph node in the groin (just below the waist, near the hip). Giving the extract that way is an off label use. A typical course is about three injections over about two months, the schedule from a 2008 trial in people with grass pollen allergy. In that study, ILIT raised nasal tolerance to grass pollen within four months, and after three years the effect wasn't significantly different from three years of allergy shots, with fewer allergic side effects.

ILIT research is promising but smaller than the research behind allergy shots, and results vary from person to person. The ILIT FDA FAQ covers the off label question in more detail.

Finding ILIT near Toledo

To see allergists who offer ILIT, search near Toledo or browse our Ohio providers page. For a season by season look at allergies across the country, see Seasonal Allergies by Season.