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Allergy Season In Arizona: Allergens By Region + Symptoms & Treatment

Allergy Season In Arizona: Allergens By Region + Symptoms & Treatment

Written by:
Dr. Shuba Iyengar, MD, MPH
Dr. Shuba Iyengar, MD, MPH
After graduating from UC Berkeley, Shuba completed medical school at Duke University, earning her MPH in tandem at UNC. After a research fellowship at the NIH, Shuba completed her residency at Stanford, then fellowship in allergy-immunology at Boston Childrens/Harvard.

Shuba returned to the Bay Area to join Dr. Bocian at a large multi-speciality health system where she helped lead an allergy practice. She cofounded Allermi to make expert allergy care more accessible for all.

Arizona, known for its desert climate, is not immune to seasonal allergies. The state's unique weather patterns and diverse plant life contribute to a variety of allergens throughout the year.

From the blooming trees in spring to the dust storms in summer, each season brings its own set of challenges. Furthermore, the type and severity of allergens can vary significantly across different regions of the state.

Here's a breakdown of what to expect during each season.


Spring is typically the peak allergy season in Arizona. This is when plants start to bloom and release pollen into the air. Tree pollens, particularly from Ash, Cedar, Cottonwood, and Pine trees, are prevalent during this time.

Common symptoms include sneezing, runny or stuffy nose, watery and itchy eyes, and coughing. It's recommended to stay indoors on windy days when pollen counts are high and to keep windows closed to prevent pollen from entering homes.

During the summer months, grasses such as Bermuda grass, Kentucky bluegrass, and Timothy grass release their pollen. In addition, the monsoon season can stir up mold spores, causing allergic reactions.

Dust storms, common in Arizona summers, can also trigger allergies. These storms carry allergens that can cause respiratory issues. Wearing sunglasses and avoiding outdoor activities during dust storms can help reduce exposure.

Fall in Arizona sees an increase in weed pollens. Ragweed, Sagebrush, Russian Thistle, and Lamb’s Quarters are the main culprits. These plants release tiny grains of pollen that are carried by the wind across large distances.

Ragweed, in particular, is a significant allergen and can cause a condition known as hay fever. Regularly washing your hands and face, and changing clothes after being outside can help minimize contact with these allergens.

Winter is usually the mildest season for allergies in Arizona. However, indoor allergens can be problematic. Dust mites, pet dander, and indoor mold can cause allergy symptoms.

Using air purifiers, regularly cleaning carpets and bedding, and keeping pets out of bedrooms can help manage indoor allergens.

In conclusion, while Arizona's climate may vary from the rest of the country, residents are not exempt from seasonal allergies. Understanding what triggers these allergies and taking preventative measures can help individuals enjoy each season in this beautiful state.

Allergens by Regions in Arizona

Arizona's diverse geography, ranging from desert to highlands, contributes to a variety of allergens across its regions. Here's a breakdown of what to expect in each area.

Northern Arizona
Northern Arizona, including cities like Flagstaff and Prescott, is known for its forests and cooler climate. The primary allergens in this region are tree pollens, particularly from Juniper, Oak, and Pine trees, especially during the spring season. Mold can also be an issue due to the higher humidity and rainfall in this region.

Central Arizona
Central Arizona, home to Phoenix and Scottsdale, experiences a wide range of allergens. In the spring, Palo Verde, Mesquite, and Olive trees release pollen. Summer brings grass pollens from Bermuda grass and dust storms that stir up mold spores and dust mites. Fall sees an increase in weed pollens, particularly from Sagebrush and Russian Thistle.

Southern Arizona
Southern Arizona, including Tucson and Yuma, has a hot desert climate. Springtime allergens include tree pollens from Cottonwood and Ash trees. The summer monsoon season can lead to increased mold spores. Weed pollens, especially Ragweed and Lamb’s Quarters, are common in the fall.

Eastern and Western Arizona
Eastern Arizona, with its mountainous terrain, sees tree pollens from Cedar and Pine trees in the spring. Western Arizona, which includes the Colorado River region, experiences similar allergens as Central Arizona, with the addition of Salt Cedar tree pollen in the spring.

In conclusion, the allergens in Arizona vary greatly by region and season. Understanding the specific allergens in your area can help you better manage your allergies and enjoy all that Arizona has to offer.


Living with allergies in Arizona can be challenging due to high pollen levels and other allergens. To manage allergies effectively, stay informed about pollen levels, keep your home clean, create a pollen-free zone, practice good personal hygiene, consult with an allergist, carry prescribed medications, wear protective gear, stay hydrated, monitor indoor humidity, and seek relief with natural remedies.

By implementing these tips, you can take control of your allergies and enjoy a better quality of life in Arizona. Remember to consult with a healthcare professional for personalized advice.

Arizona Allergy Season FAQ

When is allergy season in Arizona?
Allergy season in Arizona typically begins in early spring and can last until the first frost in winter. However, the severity and type of allergens vary by season and region.

What are the most common allergens in Arizona?
The most common outdoor allergens in Arizona include tree pollens (from Ash, Cedar, Cottonwood, Pine, Palo Verde, Mesquite, Olive trees), grass pollens (from Bermuda grass, Kentucky bluegrass, Timothy grass), and weed pollens (from Ragweed, Sagebrush, Russian Thistle, Lamb’s Quarters). Indoor allergens such as dust mites, pet dander, and mold can also cause allergies year-round.

Are allergies worse in certain parts of Arizona?
Allergies can be worse in certain parts of Arizona due to regional differences in plant life and weather patterns. For example, Northern Arizona has a higher concentration of tree pollens, while Central Arizona experiences dust storms that can stir up allergens.Can moving to Arizona cure my allergies?

While some people may experience relief from certain allergies due to Arizona's dry climate, new allergies can also develop over time due to exposure to different types of allergens present in the state.


Using multiple over-the-counter allergy treatments is not ideal for getting through allergy season in Arizona. Skip the drugstore and get a personalized all-in-one allergy treatment from the comfort of your home. 

Allermi is a customized nasal spray designed by experienced, board-certified allergists to solve your unique seasonal allergy symptoms. The Allermi formula is backed by science to give you the most effective allergy treatment for your individual allergy symptoms. 

The best part? Allermi nasal spray is easy to use and delivered to your door in Arizona.