Dr. Burton Schaber
Know Allergy
Portland, OR · Portland metro and Tualatin Valley edge
Portland, OR Pollen Count Today
Portland allergy risk is shaped by urban forest, Columbia and Willamette River moisture, west-side grass fields, foothill air, marine-influenced weather, early tree pollen, summer grass, and damp-weather mold.
Today's pollen count in Portland
Today in Portland, Oregon, the forecasted pollen level is none with an allergy index of 0. The primary allergen is Tree. Use the forecast below to see whether conditions are likely to rise, ease, or stay steady over the next few days.
AllergyAva shows forecasted pollen levels and allergy risk estimates for Portland. Actual exposure can vary by neighborhood, weather, and time outdoors.
Pollen Level
No Risk0
Google UPI (0–5)
Primary Allergen
Tree
Pollen exposure is minimal. Symptoms from outdoor pollen are unlikely for most people.
83°
Temp
75%
Humidity
15
Wind mph
Pollen: Includes data from Google Maps · Weather: AllergyAva estimated fallback
5-Day Pollen Forecast
Best day this week
Mon - None
Worst day this week
Fri - Low
Mon
75°/55°
0
None
Tree0
Grass0
Weed0
Today
81°/59°
2
Low
Tree0
Grass0
Weed2
Tomorrow
81°/59°
2
Low
Tree0
Grass0
Weed2
Thu
81°/59°
2
Low
Tree0
Grass0
Weed2
Fri
81°/59°
2
Low
Tree0
Grass0
Weed2
None
Very Low
Low
Moderate
High
Very High
Allergen Breakdown
Tree
None
Ava Personal Risk
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Weather-allergy synergy
Why conditions feel this way today
Breezy weather in Portland can lift pollen from trees, grasses, weeds, and outdoor surfaces even when the index is not at its weekly peak.
- Temp
- 83°F
- Humidity
- 75%
- Wind
- 15 mph
- Rain chance
- 45%
24-hour allergy risk curve
Best outdoor window today in Portland
Better
No clearly better outdoor window while alerts, storm risk, or strong wind are present.
Avoid
Storm periods, gust fronts, and exposed outdoor areas.
Extra caution
Stay indoors during storms, especially if pollen or asthma affects your breathing.
Data Confidence & Sources
Pollen Forecast
- Source
- Includes data from Google Maps · Pollen API (1×1 km grid resolution)
- Last Daily Update
Pollen models recalculate once daily
Weather Conditions
- Source
- AllergyAva estimated weather fallback
- Last Refresh
Weather data updates every 15–30 minutes
Local pollen exposure can vary by micro-vegetation, wind gusts, structural barriers, and time spent outdoors.
Check pollen in another city or ZIP code
Local allergy care
Allergists near Portland, OR
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.
Dr. Gregory Owens
OHSU Allergy and Clinical Immunology Clinic
Dr. Jessica Macdougall
OHSU Allergy and Clinical Immunology Clinic
Showing 3 of 9 published allergist profiles in this area.
City allergy guide
Portland allergy profile
Today's risk+
Portland's allergy pattern reflects western Oregon moisture, urban tree canopy, river corridors, foothill air, and nearby Willamette Valley grass influence. Alder, cedar, birch, maple, oak, ash, cottonwood, and other trees can drive the early season.
Grass pollen becomes more important from late spring into early summer, especially when warm dry weather follows a wet growth period. Mold can remain relevant during damp stretches because river moisture, leaf litter, shaded yards, and forested edges all support spore exposure.
Portland's guide sections below focus on recurring local exposure patterns. Today's none Tree reading is the live risk signal, while the seasonal and neighborhood notes explain where exposure can still differ during normal routines.
Seasonal guide+
November-January
Moist-season mold and early activity
Outdoor pollen is often lower, but damp leaves, shaded soil, indoor allergens, and occasional early tree activity can still trigger symptoms.
February-May
Early tree pollen season
Alder, cedar, juniper, birch, maple, oak, ash, cottonwood, and pine can overlap during Portland's spring warmups.
May-July
Grass pollen peak
Ryegrass, fescue, bentgrass, orchard grass, lawns, parks, and nearby valley fields can drive strong grass exposure.
August-October
Weeds and fall mold
Ragweed, dock, plantain, pigweed, disturbed soil, and damp leaf litter can contribute as summer dries into fall.
Treatment and planning tips+
Rain breaks
Rain can briefly clear pollen, but watch for mold during damp periods and pollen rebound when warm dry weather follows.
Parks and greenways
Tree-lined trails, forested parks, river paths, and grassy fields can feel different depending on the season's main allergen.
Windows
Cool marine air is tempting, but keep windows closed during high tree or grass pollen windows if symptoms flare indoors.
Portland seasonal pollen calendar
Moist-season mold and early activity
November-January
Outdoor pollen is often lower, but damp leaves, shaded soil, indoor allergens, and occasional early tree activity can still trigger symptoms.
Early tree pollen season
February-May
Alder, cedar, juniper, birch, maple, oak, ash, cottonwood, and pine can overlap during Portland's spring warmups.
Grass pollen peak
May-July
Ryegrass, fescue, bentgrass, orchard grass, lawns, parks, and nearby valley fields can drive strong grass exposure.
Weeds and fall mold
August-October
Ragweed, dock, plantain, pigweed, disturbed soil, and damp leaf litter can contribute as summer dries into fall.
Common pollen triggers around Portland
| Trigger | Typical season | What to know |
|---|---|---|
| Tree pollen | Spring | Often drives early-season symptoms |
| Grass pollen | Late spring to summer | Can rise around lawns, parks, and open areas |
| Ragweed/weed pollen | Late summer to fall | Major fall allergy trigger |
| Mold spores | Varies | Often affected by moisture and decaying leaves |
Local exposure factors
Portland's river and urban forest allergy factors
These local factors explain recurring exposure differences around Portland; the current index, primary allergen, and weather cards above remain the canonical source for today's live reading.
Urban forest and early trees
Alder, cedar, maple, birch, oak, ash, cottonwood, and other trees can raise spring exposure around neighborhoods, parks, and greenways.
River corridors and moisture
The Columbia and Willamette river corridors can influence humidity, pollen settling, and mold irritation during damp periods.
West-side grass influence
Grass fields, lawns, parks, and Willamette Valley grass pollen can become more noticeable from late spring into early summer.
Foothill and marine weather
Marine air, foothill breezes, and warm dry breaks after rain can change whether trees, grasses, or mold dominate the day.
Frequently asked questions about pollen in Portland
What is the pollen count in Portland today?
Today in Portland, Oregon, the pollen level is none with an allergy index of 0. The main allergen to watch is Tree.
Why can Portland pollen differ from Eugene or Salem?
Portland has more urban forest, river corridors, marine influence, foothill air, and metro heat effects. Eugene and Salem sit deeper in the Willamette Valley grass belt.
What months are worst for allergies in Portland, Oregon?
February through May is usually important for tree pollen, May through July is the main grass pollen period, and damp fall or winter stretches can raise mold irritation.
Does rain help Portland allergies?
Rain can temporarily lower airborne pollen, but damp conditions may increase mold exposure. Warm dry weather after rain can also restart tree or grass pollen release.
Which Portland outdoor areas can trigger allergies?
Tree-lined neighborhoods, forested parks, river paths, grassy fields, lawns, and shaded damp areas can all affect symptoms depending on the season.