Facts, Prevention, and Relief for Oregon Allergies in 2024

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Oregon may be a beautiful state with relatively pleasant temperatures throughout the year, but that spells bad news for seasonal allergy sufferers. Oregon frequently ranks as one of the worst states for allergies, with incredibly high pollen counts compared to the rest of the country.

Of course, Oregon also has indoor allergies to contend with, including dust, mold, and pet dander. But what can Oregon residents do to deal with such bad seasonal allergy seasons? And which pollen allergies are the most common?

Wyndly can help. Our doctors can provide you with a personalized allergy treatment plan that is designed to help you find long-term relief from symptoms. Get your personalized allergy consultation today, or read on to learn more about the Oregon allergy season.

When Is Oregon Allergy Season?

Oregon has the perfect climate for plant life to thrive. While this gives residents plenty of beautiful greenery to admire, it means that Oregon allergy season is year-round. Unlike many other states, where winter can provide a break from outdoor airborne allergies, Oregon residents will have to contend with them all year.

Allergens by Season

Oregon allergies happen all year. Let’s take a look at each season and the allergies it may bring.


Summer kicks off Oregon grass allergies. Bermuda, wheat, fescue, and orchard grass are the main perpetrators, with pollen counts peaking in June. Oregon has some of the highest concentrations of grass pollen in the country.


Fall is when the weed allergy season starts up in Oregon. Plantain weed and ragweed are the primary culprits. Weed allergy season will typically start in late August and last until the first frost.


Unfortunately, winter doesn’t bring the same relief from allergies that you might expect in other states. Tree allergy season can begin as early as December, with spruce, cypress, hazelnut, and juniper trees starting to release pollen.


Spring is the proper start of tree allergy season in Oregon. Alder and birch trees will start spreading their pollen in late February; then the month of March and April will see sycamore, cottonwood, oak, maple, ash, pecan, locust, and beech trees join the fray. Oregon has some of the highest concentrations of tree pollen in the country.

Common Allergens

Oregon residents have to deal with many different types of tree, grass, and weed pollens thanks to the mild and wet climate.

Common Symptoms

Oregon residents can expect the following allergy symptoms:

  • Runny nose
  • Coughing
  • Congestion
  • Sneezing
  • Headaches
  • Scratchy throat
  • Itchy eyes
  • Watery eyes
  • Hives
  • Aggravated asthma symptoms

As always, reactions will vary from person to person, but in general, allergies will cause one or more of these symptoms to occur.

Allergens Around the State

Different areas of Oregon will have different pollen allergies. Let’s take a look at some major areas of Oregon and the allergies their residents often have.

North Bend/Coos Bay

For the North Bend/Coos Bay areas, spring allergies include oak and willow pollen. Summer allergies include bluegrass, ryegrass, Bermuda, bent, timothy, and sweet vernal grasses. Weed allergies in the fall include ragweed and coyote brush. Winter allergies are often caused by ash trees and ragweed.


The Portland/Eugene/Salem areas will begin spring tree allergy season with willow, privet, juniper, oak, and mulberry allergies. Grass allergies in summer will often be caused by Bermuda, timothy, and orchard grasses; bluegrass; ryegrass; and fescue pollen. In fall, weed allergies take over, with wormwood, orache, amaranth, and sagebrush. Winter allergies are commonly a response to ash and mulberry trees.

Medford/Klamath Falls/Burns/Crater Lake National Park

The Medford/Klamath Falls/Burns/Crater Lake National Park tree allergy season peaks in spring with willow, oak, maple, and juniper trees. Summer grass allergies include bent, timothy, sweet vernal, ryegrass, and fescue pollen. Fall sees the start of weed allergy season with mustard, wormwood, sagebrush, orache, and ragweed. Winter allergy triggers include maple and ash trees.


Spring tree allergies in the Bend/Redmond/Pendleton/Hermiston areas include maple, willow, and juniper pollen. In summer, bluegrass, ryegrass, bent, timothy, orchard, and fescue grasses cause the most problems. In fall, weed allergies are often due to wormwood, ragweed, smotherweed, and sagebrush. Winter allergies are often related to maple tree pollen.

Pacific Allergen Zone Map, Oregon Pollen Hotspots

Testing and Diagnosis

Anywhere with seasonal allergies will have multiple types of pollen floating through the air at any given time. This can make it hard to figure out which allergens are specifically causing your symptoms. But with Wyndly, allergy testing is simple. Just order an at-home allergy test, do a quick finger-prick test, and we’ll be able to get your results. Get your allergy test from Wyndly today.

Here’s how different allergy testing options work:

Old-Fashioned Method: Skin Prick Test at Your Doctor’s Office

Skin prick testing requires you to go to the doctor to find out your allergen triggers. It’s often uncomfortable, and it takes time out of your day. You’ll go to the doctor’s office, they’ll administer a test where they prick or scrape your skin with a needle tipped with different allergens, and then they’ll observe the areas they pricked for itchiness, redness, or swelling. All in all, it can be an uncomfortable experience. You can save yourself time and pain by getting an at-home test instead.

Modern and Efficient At-Home Method

  1. Buy Wyndly’s at-home allergy test. We ship our CLIA-certified test straight to your door.
  2. Take the allergy test and send it back to us. Just do a quick finger prick test to provide us with a blood sample and mail it back when you’re done.
  3. Receive your allergy profile. Our doctor will interpret your results, create an allergy profile, and walk you through a treatment plan.

Treatment and Remedies

No one likes dealing with allergy symptoms. Luckily, you have several options for treating and managing your symptoms. Let’s take a look at some of them.

Limiting Exposure

It’s best to limit your exposure to your allergens as much as possible. Several methods might work for you.

  • Keep your house clean: Keeping your home as clean as possible during allergy season can ensure pollen in your home is kept to a minimum. Vacuum weekly with a HEPA filter vacuum, dust surfaces, and do laundry often to get pollen off your clothes.
  • Keep windows closed: Keeping your windows closed will help keep pollen out. Running your A/C, especially if you have A/C with a HEPA filter, will help prevent pollen from circulating through the air in your home.
  • Shower frequently: Pollen will stick to your skin and hair, so it’s a good idea to shower after you’ve been outside for a while.
  • Check the pollen count: The pollen count will tell you how high the concentration of pollen is in the air on a daily basis. If you see that the pollen count is high, you should try to stay indoors — or at least mask up when you go outside.
  • Cut grass and trim trees: Cutting the grass short and trimming tree branches can reduce the amount of pollen they produce.


When limiting exposure isn’t doing enough to manage your symptoms, you should consider over-the-counter allergy medications. Antihistamines, eye drops, nasal sprays, and decongestants are widely available and can help reduce a variety of common allergy symptoms.

Sublingual Immunotherapy Allergy Drops

Do you want lifelong allergy relief? For that, you should consider sublingual immunotherapy allergy drops. Allergy drops train your immune system to ignore allergy triggers instead of reacting. They’re an equally effective and painless alternative to allergy shots that you can take in the comfort of your own home. Using small, gradually increasing doses of your allergen, you can find long-term relief from your symptoms.

Get Long-Term Relief With Wyndly

If you’re ready to find long-term relief from your allergies, let Wyndly help. You can get a consultation and a personalized treatment plan designed to treat your Oregon allergies. Using sublingual immunotherapy, you can treat your symptoms at the source instead of just managing them.

Get your allergy consultation with Wyndly today.

Oregon Allergy FAQs

Still have questions about Oregon allergies? Here are some common questions and answers to help you out.

How long is Oregon’s allergy season?

Oregon allergy season can last throughout the year.

Why is allergy season so bad in Oregon?

Oregon has a mild and wet climate, which allows trees and grass to thrive. Pollen levels are extremely high in Oregon.

Is Oregon a good state if you have allergies?

Oregon is one of the worst states for allergies because of the high concentrations of pollen and abundant plant life.

When is the Oregon allergy season?

Oregon allergy season can kick off as early as December and go into late November.

What are the worst months?

The worst months are March/April for tree allergies, June for grass allergies, and September for weeds.

Seasonal Allergies By State

Alabama Allergy Season

Arizona Allergy Season

Arkansas Allergy Season

California Allergy Season

Colorado Allergy Season

Connecticut Allergy Season

Delaware Allergy Season

Florida Allergy Season

Georgia Allergy Season

Idaho Allergy Season

Illinois Allergy Season

Indiana Allergy Season

Iowa Allergy Season

Kansas Allergy Season

Kentucky Allergy Season

Louisiana Allergy Season

Maine Allergy Season

Maryland Allergy Season

Massachusetts Allergy Season

Michigan Allergy Season

Minnesota Allergy Season

Mississippi Allergy Season

Missouri Allergy Season

Montana Allergy Season

Nebraska Allergy Season

Nevada Allergy Season

New Hampshire Allergy Season

New Jersey Allergy Season

New Mexico Allergy Season

New York Allergy Season

North Carolina Allergy Season

North Dakota Allergy Season

Ohio Allergy Season

Oklahoma Allergy Season

Oregon Allergy Season

Pennsylvania Allergy Season

Rhode Island Allergy Season

South Carolina Allergy Season

South Dakota Allergy Season

Tennessee Allergy Season

Texas Allergy Season

Utah Allergy Season

Vermont Allergy Season

Virginia Allergy Season

Washington Allergy Season

West Virginia Allergy Season

Wisconsin Allergy Season

Wyoming Allergy Season

When Do Seasonal Allergies Start and End in Each State?

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