WA · Allergy Season Guide
Seattle Allergy Season Guide
PollyMap is actively seeking a qualified local collection partner in Seattle. This guide uses regional climate and historical allergen data while we recruit a local host.
PollyMap is actively looking for a qualified local partner in Seattle.
We're recruiting a qualified local allergy clinic, naturopathic clinic, university, environmental health professional, or other qualified organization to become the official pollen collection partner for Seattle.
Become the PollyMap Collection Partner for SeattleSummary
PollyMap does not yet have weekly collected pollen data for Seattle. This guide is based on regional climate patterns and historical allergen data while we recruit a local collection partner. Tree pollen peaks in spring, grass pollen in late spring and early summer, and weed pollen in late summer and fall.
Local allergy guide for Seattle
Seattle shares Washington's a cool, wet maritime climate with mild summers, rainy winters, and high year-round humidity. at 175 ft elevation.
Seattle at 175 ft elevation sits within Washington's broader regional climate.
In Seattle, tree pollen — including Alder, Birch, Cedar — typically dominates from late winter through spring. Rye grass is the most common warm-season pollinator, and Plantain drives the largest fall pollen load.
Seattle's local mold profile includes Cladosporium, Alternaria, Penicillium. Spore counts tend to peak after rainfall and during the warm, humid portion of the year.
Local weather — temperature, rainfall, wind, and humidity — drives day-to-day pollen levels. Dry, windy days following warm weather typically produce the highest counts, while heavy rain temporarily clears the air.
Seattle monthly allergy calendar
Typical month-by-month intensity for the four major airborne allergen categories in Seattle.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | High | V.High | V.High | High | Mod | Low | Low | Low | Low | Low | Mod | Mod |
| Grass | — | Low | Mod | High | V.High | V.High | High | Mod | Low | Low | Low | — |
| Weed | Low | Low | Mod | Mod | Mod | Mod | High | High | High | Mod | Low | Low |
| Mold | High | High | Mod | Mod | Low | Low | Low | Mod | Mod | High | V.High | High |
Most common airborne molds
Current PollyMap data for Seattle
Recommended allergy clinic in Seattle
We are currently seeking a qualified local allergy clinic or health provider to become the PollyMap collection partner for Seattle.
Partner Program
Become a PollyMap Collection Partner in Seattle
We work with allergy clinics, naturopathic clinics, universities, and qualified environmental health professionals to build the most reliable, locally-collected pollen network in America.
Partner benefits
- Dedicated local partner profile on PollyMap
- Local exposure to thousands of allergy searchers
- Backlinks from your city and state guide pages
- Lead generation from local allergy patients
- Featured on every local PollyMap report
- Recognition as a pollen data collection center
- Collaboration on local pollen research and reports
Partner requirements
- Receive a PollyKit weekly by mail
- Hang the PollyKit collector for 24–48 hours
- Mail the sample back weekly using prepaid packaging
- Maintain a consistent collection schedule year-round
Frequently asked questions about allergies in Seattle
Test the air at your address
Curious what's actually in the air at your Seattle home or office?
The PollyKit is the easiest air-sampling kit on the market — collect outdoor pollen and airborne mold indoors at your home, office, classroom or rental, then mail it in for a full lab report. Just $39.99.
- Outdoor pollen counts
- Indoor airborne mold
- Lab-analyzed results
- Ships nationwide
What's in the box
- Air sampling rodsx2
- Indoor mold slidex1
- Prepaid lab returnincluded
- Personal results report3–5 days
The only consumer kit that pairs outdoor pollen with indoor airborne mold sampling.
Related guides
State Guide
Washington Allergy Season Guide
Nearby city
Spokane Allergy Season Guide
Nearby city
Tacoma Allergy Season Guide
Nearby city
Vancouver Allergy Season Guide
Nearby city
Bellevue Allergy Season Guide
Library
Pollen species library
Library
Mold species library
Reports
Latest PollyMap reports
Partners
Become a partner
Get local pollen alerts for Seattle.
Subscribe and we'll email you when new local reports are published.
Subscribe to alerts