OR pollen report
Salem Pollen Report
Salem sits in the heart of the Willamette Valley — the grass-seed capital of the world — and its June grass pollen counts are among the highest measured anywhere. Alder and birch start the season in late winter, ryegrass fields bury the valley in late spring, and the region's wet climate keeps mold active through much of the year.
Collection coming soon to Salem
PollyMap is actively recruiting a verified local partner in Salem. 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 Salem
No allergy clinic is reporting from Salem 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 Salem
Grasses: ryegrass and fescue (May – July)
The valley's grass-seed fields release enormous pollen loads in late May and June. Grass is Salem's signature — and most intense — season.
Trees: alder, birch, and oak (February – May)
Alder (Alnus) starts as early as February, followed by birch, ash, and Oregon white oak (Quercus garryana).
Weeds: modest fall (August – October)
Ragweed is lighter than in the Midwest; plantain, sorrel, and pigweed contribute through late summer.
Mold: the valley's wet constant
Salem's long rainy season keeps Alternaria and Cladosporium active much of the year, with peaks after fall rains and during midsummer field cutting.
Pollen patterns in Salem
In Salem, 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
Salem 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 Salem
Explore pollen activity in nearby cities reported by the PollyMap network.
Recent reports near Salem
Published samples from other Oregon locations.
Frequently asked questions
What is the pollen count in Salem today?
PollyMap publishes real, microscope-verified pollen counts for Salem — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in Salem right now?
In late May and June, Willamette Valley grass pollen counts are among the highest in the country. The measured reports on this page show today's actual levels.
When is allergy season in Salem?
Trees February–May, grass season peaking in June, weeds into fall, and mold through the wet months.
Why is Willamette Valley grass pollen so extreme?
The valley produces most of the nation's grass seed. When millions of acres of ryegrass and fescue pollinate at once, pollen blankets the entire region, Salem included.
Are you an allergy clinic in Salem? 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 Salem, 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 Salem metro — like a franchise territory. Salem has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Salem 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.
Salem, Keizer, and the mid-Willamette Valley make natural PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Salem 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 Salem
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