OR pollen report
Eugene Pollen Report
Eugene sits at the southern end of the Willamette Valley — the grass-seed capital of the world — and it regularly posts some of the highest grass pollen counts measured anywhere in the United States. Miles of ryegrass seed fields surround the metro, and when they pollinate in late spring, the entire valley fills with pollen. Add spring tree pollen from oak and ash and a damp, mold-friendly climate, and Eugene is one of the most allergy-intense cities in the country for its size.
Collection coming soon to Eugene
PollyMap is actively recruiting a verified local partner in Eugene. Be the first to know — or apply to be the partner.
While we find a local clinic
Test the air at your own home in Eugene
No allergy clinic is reporting from Eugene yet. Until one does, you can order your own PollyKit — a simple air sampler you hang outdoors or indoors. Send it back and the PollyKit Lab shows you exactly what's floating in your air.
- Pollen from local trees, grasses and weeds
- Airborne mold spores
- Dust mites and other indoor allergens
Hang it outdoors
See which pollen and mold are in your yard this season.
Or hang it indoors
Check bedrooms and living spaces for mold, dust mites and more.
What drives allergies in Eugene
Grasses: ryegrass, the main event (May – July)
The Willamette Valley produces most of the nation's grass seed, and its ryegrass (Lolium) and fescue fields release enormous pollen loads from late May through June. This is Eugene's signature season — counts far higher than most US cities ever record.
Trees: oak, ash, and alder (February – May)
Oregon white oak (Quercus garryana), ash, alder, and birch drive the spring season, starting with alder as early as February. Cedar and juniper from the surrounding hills add to the early mix.
Weeds: modest but present (August – October)
Ragweed is less dominant here than in the Midwest, but plantain, sorrel, and pigweed contribute through late summer and early fall.
Mold: the Willamette Valley's constant companion
Eugene's long, wet season keeps outdoor mold spores active much of the year, with peaks after fall rains return and grass fields are cut in midsummer.
Pollen patterns in Eugene
In Eugene, 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.
Top trees
- Alder
- Birch
- Cedar
- Hazel
- Maple
Top grasses
- Rye
- Orchard
- Timothy
- Bentgrass
Top weeds
- Plantain
- Dock
- Nettle
Top molds
- Cladosporium
- Alternaria
- Penicillium
- Aspergillus
Eugene pollen calendar
Typical monthly intensity across the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tree | ||||||||||||
| grass | ||||||||||||
| weed | ||||||||||||
| mold |
Historical reports
Cities near Eugene
Explore pollen activity in nearby cities reported by the PollyMap network.
Recent reports near Eugene
Published samples from other Oregon locations.
Frequently asked questions
What is the pollen count in Eugene today?
PollyMap publishes real, microscope-verified pollen counts for Eugene — measured from physical air samples, not modeled estimates. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in Eugene right now?
If it's late May or June, almost certainly — Eugene's grass pollen season is one of the most intense in the country. Check the measured reports on this page to see current levels.
When is allergy season in Eugene?
Tree pollen runs February through May, and the famous grass season peaks in late May and June. Weeds carry into fall, and mold stays active through the wet months.
Why is Eugene's pollen so extreme?
The surrounding Willamette Valley grows the majority of America's grass seed. When millions of acres of ryegrass and fescue pollinate at once in late spring, the pollen has nowhere to go but across the entire valley — including Eugene.
Are you an allergy clinic in Eugene? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of Eugene, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the Eugene metro — like a franchise territory. Eugene has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Eugene yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
In the grass-pollen capital of the country, the clinic that publishes real local counts earns serious trust. PollyMap territories in Eugene, Springfield, and the surrounding valley are assigned first-come.
- Your clinic credited on every Eugene pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of Eugene
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