Arizona Allergy Season 2026: What to Expect and How to Prepare

Spring hasn’t officially begun, but allergy season is already underway in Arizona, and experts predict it could be one of the longest and most intense on record. Warmer winter temperatures are triggering an early start to pollen production, impacting residents across the state.

Early Start to Allergy Season

Many states, including Arizona, are experiencing warmer temperatures earlier than usual. This has led to an accelerated start to the spring allergy season. Data from the National Oceanic and Atmospheric Administration (NOAA) reveals this winter was the second-warmest on record for the continental U.S., contributing to increased pollen production .

What’s Causing the Prolonged Season?

Warmer winters and falls are extending the duration of allergy seasons. “The pollens have been staying around much longer than we typically see,” explains Dr. Victoria Nguyen of The Ohio State University Wexner Medical Center . Climate change is likewise a contributing factor, as warmer temperatures and longer growing seasons allow plants to release pollen for extended periods .

Common Allergens in Arizona

Depending on individual sensitivities, allergy symptoms can occur year-round in Arizona. Though, pollen allergies are most prevalent during the spring, summer, and fall. Tree pollen typically emerges first, peaking in early spring, followed by grass pollen. Weeds are also common allergens, particularly later in the summer and fall . Specific trees contributing to high pollen levels in Arizona include olive, mulberry, ash, mesquite, pine, and palo verde .

Managing Allergy Symptoms

The American College of Allergy, Asthma and Immunology notes that symptoms flare up when exposed to allergens . Here are some steps to manage symptoms:

• Preventative Medication: Doctors recommend starting allergy medications, including intranasal steroids and antihistamines, now to manage symptoms before they worsen .
• Minimize Exposure: Reducing contact with allergens can be helpful.
• Seek Medical Treatment: If symptoms worsen or over-the-counter medications aren’t providing relief, consult a doctor .

When Does Allergy Season End in Arizona?

Due to Arizona’s unique climate, allergy season can last year-round . While tree pollen is most prominent through May, grass and weed pollen continue to be factors throughout the summer and fall.

Key Takeaways

• Allergy season in Arizona is starting earlier and expected to be longer in 2026.
• Warmer winter temperatures are a primary driver of increased pollen production.
• Tree, grass, and weed pollens all contribute to allergies in Arizona.
• Preventative measures and medical treatment can help manage symptoms.