Allergy Season in California: Everything You Need to Know (2024)

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California has fairly warm weather most of the year, but because it has a more coastal climate, pollen counts tend to be lower than in other states with similar weather conditions. There are still many seasonal allergies in California, and indoor allergies can also cause issues for many.

Wyndly is a great resource for allergy sufferers. Our doctors will create a personalized treatment plan to help provide you with long-term relief from your allergies. Schedule a consultation today to get a personalized treatment plan, or read on to learn more about California’s seasonal allergies.

What Are Seasonal Allergies?

Seasonal allergies typically refer to allergies that are triggered by pollen. Pollen is only released by plants during certain times of the year, because of this, these allergies aren’t year round. The primary producers of pollen in California are grasses, trees, and weeds.

When Is California Allergy Season?

Depending on what you are allergic to, you can experience allergy symptoms during any time of year in California. Pollen allergies will flare up in the spring, summer, and fall, while indoor allergies can cause allergic reactions at any point in the year.

California is in the Pacific Northwest, Intermountain & High Desert, Coastal & Central California, and Desert Southwest allergy regions. Each region might have slightly different allergens and allergy seasons, but we’ve compiled the most common information for allergy season in California.

Pacific Allergen Zone Map

What Months Are Allergy Season?

In California, allergy season typically starts around late January and ends in early October. However, if you suffer from indoor allergies, such as allergies to dust, pet dander, or mold, you might notice that they worsen during the winter if you spend more time inside than usual.

When Does Allergy Season Start in California?

California allergy season starts in the spring. California has a milder winter, so seasonal allergies will commonly begin in late January. This is a longer allergy season than some other states, but because of California’s climate, allergy season can be a bit better for allergy sufferers.

When Is Peak Allergy Season in California?

You’ll want to keep an eye on pollen counts in April, May, and September. These months are when seasonal allergies are typically at their peak. During these months, try limiting your time outdoors or going out in the evening when pollen counts tend to be lower in California.

If you have seasonal allergies and are traveling to California during April, May, and September, make sure you have an allergy treatment plan that works for you before your trip. During your trip, check the local pollen count daily to adjust your plans accordingly.

When Does Allergy Season End in California?

California allergy season usually ends in October or November. Winter weather is milder, but residents still get a break from their seasonal allergies. Even though California might not have as many outdoor allergens to worry about during the winter, indoor allergens can still cause issues for allergy sufferers.

Common Allergies in California

While this is not a comprehensive list, some of the most common allergens in California include:

  • Bluegrass
  • Ryegrass
  • Sagebrush
  • Ragweed
  • Russian thistle
  • Mulberry
  • Oak
  • Olive
  • Ash
  • Cedar
  • Eucalyptus

Read more about allergies in California.

Seasonal Allergy Symptoms

The allergy symptoms you will experience in California will vary based on the severity of your allergies and the time of year you are in California.

Symptoms you might experience in California include:

  • Stuffy nose
  • Itchy and watery eyes
  • Congestion
  • Headaches
  • Sneezing
  • Brain fog
  • Post-nasal drip
  • Aggravated asthma symptoms

How to Prepare for California Seasonal Allergies?

If you think you are suffering from seasonal allergies, take an allergy test to identify what allergens are triggering your symptoms. The easiest way to get an allergy test in California is by ordering Wyndly’s at-home allergy test. Get your allergy test today to identify your allergies!

By understanding what allergies are causing your symptoms, it will be easier for you to avoid your triggers and find effective treatments.

Who Are Allergy Doctors in California?

In California, there are several different types of providers you can go to for your allergies. The most common types of allergy doctors are allergists, immunologists, and ENTs. When choosing an allergy doctor, the most important thing is choosing a provider you trust.

It is also important to work with a doctor who will consider both your test results and your allergy history to make sure they make sense together. You should also consider how long you will need to wait to be seen by them and how convenient it is for your schedule.

At Wyndly, our allergy doctors will work with you to get you long-term relief from your symptoms. Our doctors will create a personalized treatment plan for you based on your allergy test results and your allergy history.

Allergy Symptom Relief and Treatment

Allergies can feel difficult to manage, but there are several different methods you can try out to decrease or eliminate your allergy symptoms.

Limit Exposure

An effective method of decreasing your symptoms is limiting your exposure to the allergens that are triggering your allergies. While pollen can be difficult to avoid, there are ways that you can decrease your exposure to pollen in California.

  • Check daily pollen count: Keep an eye on pollen levels to see how high they are in California for the day. If it’s a high pollen count, try limiting your time outside that day. Pollen tends to be at its highest in the morning and afternoon in California. Evening hours will be the best time to go outside during the California allergy season.
  • Trim trees, mow the lawn, and pull weeds: By keeping tree branches trimmed, grass short, and your lawn free of weeds, you can reduce the pollen that will be released directly around your home in California.
  • Wear a mask outdoors: Wearing a dust mask when you go outside in California can help prevent pollen from getting in your airways.
  • Clean regularly: Pollen is a very sticky substance, meaning it’ll get in your home and on you and your clothes. Be sure to clean your house and do laundry frequently. Also, make sure to shower after being outdoors to wash off any pollen.
  • Keep windows closed: Opening your windows will allow for more pollen to get into your home. If you can, keep your windows closed and run your A/C instead for the duration of the allergy season in California.
  • Install a HEPA filter: Installing a HEPA filter on your A/C can help reduce the pollen levels circulating in your home.


Over-the-counter (OTC) medications are widely available in California, and they provide short-term relief from your allergy symptoms. If you find that antihistamines, nasal sprays, and eye drops don’t provide enough relief from your seasonal allergies, you can look into allergy treatments that will provide long-term relief instead of just masking your symptoms.

Sublingual Immunotherapy

If you want lifelong relief from your seasonal allergies in California, sublingual immunotherapy is the best solution. Sublingual immunotherapy involves exposing your immune system to small doses of the allergens that trigger your allergies. Through this exposure, your body becomes desensitized to your allergies, providing long-term relief. Sublingual immunotherapy is just as effective as allergy shots, but it can also be taken from the comfort of your home.

Getting sublingual immunotherapy in California is easy and convenient. You can get it shipped right to your home!

The Best Allergist in California for Seasonal Allergies

If you are looking for the best doctor to treat your seasonal allergies in California, look no further than Wyndly. At Wyndly, our allergy doctors will create a personalized treatment plan for your allergies to get you long-term allergy relief from your California seasonal allergies.

Take our easy online assessment now to see if our doctors can get you long-term allergy relief from your seasonal allergies in California!

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