WA
Washington Pollen Reports
Washington experiences a cool, wet maritime climate with mild summers, rainy winters, and high year-round humidity.
No active PollyMap Partner in Washington yet
We're seeking a pollen partner in Washington.
PollyMap doesn't publish cheap forecast estimates — the kind that guess what might be in the air and are often wrong by the time you read them. Every report on PollyMap is real airborne pollen and mold, captured by a PollyKit air sampler and counted under a microscope by a trained local partner.
We're actively seeking an allergy clinic or qualified collector to become the Official PollyMap Partner for Washington. Exclusive territory, weekly content, and AI-assisted analysis included.
Pollen patterns across Washington
Alder, birch, and cedar lead a strong late-winter and early-spring tree season. Grass pollen is intense from May through July, and the Willamette and Puget lowlands are among the heaviest grass pollen regions in North America.
Washington pollen calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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Featured cities in Washington
Don't see your city? PollyMap partners can serve any city in Washington — request a local report below.
Don't see your city?
We cover every city in Washington through our partner network. Request a report for your town and we'll route it to the nearest certified allergist.
Latest reports
Frequently asked questions
When is allergy season in Washington?
Allergy season in Washington typically runs from late winter through fall. Tree pollen rises first, followed by grass pollen in late spring and early summer, and weed pollen (especially ragweed) in late summer and fall.
What pollen is highest in Washington?
In Washington, the highest-pollen species are typically Alder, Birch, Cedar in spring, Rye grass in early summer, and Plantain in fall.
What months are worst for allergies in Washington?
For most people, April and May (tree pollen) and September (ragweed) are the most difficult months in Washington, with grass pollen creating a third peak in June.
Does Washington have mold allergies?
Yes. The region's climate supports both outdoor and indoor mold exposure — particularly Cladosporium, Alternaria. Outdoor mold spore counts often rise after rain and in fall when leaves decay.
How can clinics become PollyMap collection partners?
Qualified allergy clinics, naturopathic offices, universities, and environmental health professionals can apply to host a PollyKit and become an official PollyMap collection partner. Applications are reviewed by the PollyMap team.
Become the lead collection partner for Washington.
PollyMap is actively seeking allergy clinics and qualified collectors in Washington.
Apply today