Colusa pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Colusa is high; mugwort is high; cypress, grass, and ragweed are low. Tomorrow (10 August 2026) levels are similar - mugwort remains high, ragweed remains low. Over the following five days cypress, 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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Colusa sits on flat rice-farming country along the Sacramento River, where the dominant vegetation is a mix of rice fields, riverside cottonwood, and valley oak woodlots, shaping the local pollen profile across the seasons. This mix of plant life is fairly typical for the wider area around Colusa. Microclimates within the area can shift the timing slightly from one neighborhood to the next.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
7/100
-
Grass (Poaceae):
Low
7/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
High
70/100
-
Ragweed (Ambrosia):
Low
21/100
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):
None
0/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
High
54/100
-
Ragweed (Ambrosia):
Low
5/100
Air quality in Colusa
View air qualityFrequently Asked Questions
Is pollen high in Colusa right now?
On 9 August 2026, overall pollen levels in Colusa are high. Artemisia is the main contributor to airborne pollen, while ambrosia, cypress, and grass remain at lower levels
Will pollen levels change in Colusa tomorrow?
On 10 August 2026, pollen conditions in Colusa will be different from today, with ambrosia at low levels, artemisia at high levels
Is pollen expected to decrease in Colusa this week?
According to the five-day outlook, ambrosia, artemisia, cypress, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Colusa?
On 9 August 2026, Artemisia is the dominant pollen source in Colusa. ambrosia, cypress, and grass are also present but at lower levels.
When is pollen season in Colusa?
How often is the Colusa pollen forecast updated?
The Colusa pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Colusa 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 Colusa 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 Colusa, 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 Colusa.
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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.