Oregon pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Oregon is low; mugwort and ragweed are low. Tomorrow (10 August 2026) levels are similar - mugwort increasing, ragweed increasing, grass at low levels. 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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This area, within easy reach, has hazel and willow thrive along the damp bank, both prolific early wind-pollinators. Located within easy reach, this area has this patch of forest is largely oak and birch, a pairing known for heavy spring pollen output. Here, just around the area, the park's turf and planted trees form a small but steady source of grass and ragweed pollen.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
None
0/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
23/100
-
Ragweed (Ambrosia):
Low
13/100
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 - 10 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
12/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
50/100
-
Ragweed (Ambrosia):
Medium
42/100
Air quality in Oregon
View air qualityFrequently Asked Questions
Is pollen high in Oregon right now?
On 9 August 2026, overall pollen levels in Oregon are low. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels
Will pollen levels change in Oregon tomorrow?
On 10 August 2026, pollen conditions in Oregon will be different from today, with grass at low levels and ambrosia, artemisia increasing
Is pollen expected to decrease in Oregon this week?
According to the five-day outlook, grass and artemisia 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 9 August 2026, Ambrosia is the dominant pollen source in Oregon. artemisia are also present but at lower levels. cypress and grass 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: 9 August 2026 at 20:27 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.