Longview pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Longview is medium; ragweed is medium; grass is low. Tomorrow (10 August 2026) levels are similar - grass increasing, ragweed increasing, mugwort at low levels. Over the following five days grass, mugwort, and ragweed will increase. 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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Longview's parks, including Lake Sacajawea and the Cowlitz River corridor, feature alder, cottonwood, and Douglas fir as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Pacific Northwest woodland and the Columbia River valley contribute substantial tree and grass pollen, while the river corridor channels prevailing westerly winds and marine air from the coast.
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):
Low
7/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
None
0/100
-
Ragweed (Ambrosia):
Medium
33/100
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):
Medium
34/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
18/100
-
Ragweed (Ambrosia):
High
58/100
Air quality in Longview
View air qualityPollen forecast for neighborhoods and landmarks in Longview
Frequently Asked Questions
Is pollen high in Longview right now?
On 9 August 2026, overall pollen levels in Longview are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Longview tomorrow?
On 10 August 2026, pollen conditions in Longview will be different from today, with artemisia at low levels and ambrosia, grass increasing
Is pollen expected to decrease in Longview this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Longview?
On 9 August 2026, Ambrosia is the dominant pollen source in Longview. grass are also present but at lower levels. artemisia and cypress are not currently active.
When is pollen season in Longview?
How often is the Longview pollen forecast updated?
The Longview pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Longview 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 Longview 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 Longview, 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 Longview.
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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.