Oregon pollen forecast - today, tomorrow and the week ahead
Today (30 August) pollen in Oregon is high; ragweed is high; grass is moderate; mugwort is low. Tomorrow (31 August 2026) levels are similar - grass remains moderate, ragweed remains high, mugwort increasing. Over the following five days ragweed will increase; grass and mugwort will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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In Oregon, hazel and willow take root along the nearby water, prolific early pollinators. Around Oregon, oak and birch grow thick in the nearby woods; birch is a notorious spring allergen. Near Oregon, a nearby park tops up the local grass and ragweed count with lawn grass and plantings.
Today - 30 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Moderate
31/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
25/100
-
Ragweed (Ambrosia):
High
70/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 31 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Moderate
42/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Moderate
32/100
-
Ragweed (Ambrosia):
High
70/100
Air quality in Oregon
View air qualityPollen forecast for neighborhoods and landmarks in Oregon
Sports venues in Oregon
Frequently Asked Questions
Is pollen high in Oregon right now?
On 30 August 2026, overall pollen levels in Oregon are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Oregon tomorrow?
On 31 August 2026, pollen conditions in Oregon will be different from today, with ambrosia at high levels, grass at moderate levels and artemisia increasing
Is pollen expected to decrease in Oregon this week?
According to the five-day outlook, artemisia and grass pollen levels are expected to gradually decrease, while ambrosia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Oregon?
On 30 August 2026, Ambrosia is the dominant pollen source in Oregon. grass and artemisia are also present but at lower levels. cypress are not currently active.
When is pollen season in Oregon?
How often is the Oregon pollen forecast updated?
The Oregon pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Oregon come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Oregon based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Oregon, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Want to see pollen forecasts for other cities in United States?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 30 August 2026 at 14:32 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Oregon.
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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.