Full Breakdown
Early Allergy Season in Western Washington Linked to Climate Change
4/15/2026, 5:23:12 AM
Impact of Climate Change on Allergy Patterns
Western Washington is experiencing an earlier onset of allergy season, a phenomenon attributed to climate change. According to the Asthma and Allergy Foundation of America, growing seasons now commence approximately 20 days earlier and extend 10 days longer than they did three decades ago. Andy Spears, a representative from the foundation, noted that the amount of pollen released by trees has increased, along with its allergenicity, which refers to the strength of allergic responses to pollen.
The region's allergy sufferers are particularly affected due to the prevalence of birch, cedar, and alder trees, which release tree pollen first. As spring progresses, the overlap of tree pollen with the onset of grass pollen season creates a significant allergenic combination. Seattle ranks 45th in the foundation's Allergy Capitals report but has the third-highest grass pollen score among analyzed cities.
Weather Patterns and Pollen Release
The 2024 winter brought severe weather events, including a bomb cyclone and multiple atmospheric rivers, leading to intense rainfall that impacted the 2025 spring growing season. Spears explained that such wet conditions can accelerate plant growth and flowering, resulting in increased pollen levels. The Allergy Capitals report indicates that these trends are expected to continue into 2026.
Additionally, the increased flooding and rainfall associated with climate change have been linked to heightened mold growth, another significant allergen. This shift not only exacerbates existing allergies but also introduces new allergens, such as ragweed, into areas previously unaffected.
Recommendations for Allergy Sufferers
For individuals affected by seasonal allergies, limiting outdoor activities during high pollen counts is advisable. Various resources, including the Weather Channel, Pollen.com, and the Pollen Wise app, provide pollen count information. Spears recommends practical measures such as wearing head coverings outdoors, washing hands, and changing clothes upon returning inside to minimize pollen accumulation in homes.
Furthermore, keeping windows closed during high pollen periods, running HVAC systems, changing air filters, and using air purifiers can help reduce indoor allergen exposure. Spears emphasizes that with the availability of monitoring apps and improved air quality solutions, managing seasonal allergies has become more feasible.
Conclusion
The early arrival of allergy season in Western Washington underscores the broader implications of climate change on public health. As pollen levels rise and new allergens emerge, residents are encouraged to adopt preventive measures to mitigate allergy symptoms. While the challenges posed by climate change are significant, advancements in allergy management offer some hope for those affected.